Marks Daily Apple
Serving up health and fitness insights (daily, of course) with a side of irreverence.
14 Jan

The Primal Blueprint Carbohydrate Curve

GraphYesterday, low-carb blogger Dr. Michael Eades (he of Protein Power) posted a message from his friend and fellow low-carb guru Richard Feinman as sort of a call-to-action in public policy-making for upcoming 2010 USDA guidelines. Dr. Eades and Dr. Feinman have suggested that we ought to quickly find a way to help the USDA arrive at a sensible recommendation for carbohydrate consumption. Feinman asked:

“how can the benefits of carbohydrate restriction that you have experienced personally or in your immediate environment be translated into reasonable recommendations that the USDA could put out?”

In conjunction with my forthcoming book “The Primal Blueprint”, I have been working on an easy-to-understand explanation of how carbohydrates impact the human body and the degree to which we need them (or not) in our diet. I have also developed a chart (not the one above) that is intended to assist those who want to go “Primal” in visualizing the impact of carbs consumed within certain ranges. I was going to hold off on releasing this information until my book is published, but decided to introduce it here in response to Dr. Eades’ post. Since the choice of how many and what types of carbs in one’s diet depends on the context of one’s life (current weight, disease condition, activity levels, etc), I see carb intake as a “curve” ranging from “allowable” to “desirable” to “unhealthy”.

The following descriptions illustrate how carbohydrates impact the human body and the degree to which we need them, or not, in our diet. The ranges represent daily averages and are subject to variables like age, current height and weight and particularly training volume. For example, a heavy, active person can be successful at a higher number than a light, moderately active person. In particular, hard training endurance athletes will experience a greater need for carbs and can adjust their personal curve accordingly. This is a topic I address further in the book (e.g. – experimenting with adding 100g of carbs per hour of training per day), on and in a future “primal” book dedicated to endurance athletes. Here then is my “Primal Blueprint Carbohydrate Curve.”

300 or more grams/day Danger Zone!

Easy to reach with the “normal” American diet (cereals, pasta, rice, bread, waffles, pancakes, muffins, soft drinks, packaged snacks, sweets, desserts). High risk of excess fat storage, inflammation, increased disease markers including Metabolic Syndrome or diabetes. Sharp reduction of grains and other processed carbs is critical unless you are on the “chronic cardio” treadmill (which has its own major drawbacks).

150-300 grams/day – Steady, Insidious Weight Gain

Continued higher insulin-stimulating effect prevents efficient fat burning and contributes to widespread chronic disease conditions. This range – irresponsibly recommended by the USDA and other diet authorities – can lead to the statistical US average gain of 1.5 pounds of fat per year for forty years.

100-150 grams/dayPrimal Blueprint Maintenance Range

This range based on body weight and activity level. When combined with Primal exercises, allows for genetically optimal fat burning and muscle development. Range derived from Grok’s (ancestors’) example of enjoying abundant vegetables and fruits and avoiding grains and sugars.

50-100 grams/day – Primal Sweet Spot for Effortless Weight Loss

Minimizes insulin production and ramps up fat metabolism. By meeting average daily protein requirements (.7 – 1 gram per pound of lean bodyweight formula), eating nutritious vegetables and fruits (easy to stay in 50-100 gram range, even with generous servings), and staying satisfied with delicious high fat foods (meat, fish, eggs, nuts, seeds), you can lose one to two pounds of body fat per week and then keep it off forever by eating in the maintenance range.

0-50 grams/day – Ketosis and Accelerated Fat Burning

Acceptable for a day or two of Intermittent Fasting towards aggressive weight loss efforts, provided adequate protein, fat and supplements are consumed otherwise. May be ideal for many diabetics. Not necessarily recommended as a long-term practice for otherwise healthy people due to resultant deprivation of high nutrient value vegetables and fruits.

Drop me a line in the comment boards. I’d love to hear your thoughts on this.

Further Reading:

The Definitive Guide to the Primal Eating Plan

The Definitive Guide to Insulin, Blood Sugar and Type 2 Diabetes (and You’ll Understand It)

Primal Fitness

You want comments? We got comments:

Imagine you’re George Clooney. Take a moment to admire your grooming and wit. Okay, now imagine someone walks up to you and asks, “What’s your name?” You say, “I’m George Clooney.” Or maybe you say, “I’m the Clooninator!” You don’t say “I’m George of George Clooney Sells Movies Blog” and you certainly don’t say, “I’m Clooney Weight Loss Plan”. So while spam is technically meat, it ain’t anywhere near Primal. Please nickname yourself something your friends would call you.

  1. Something that is almost always overlooked in these stories and articles and is also overlooked in the above article, is the issue of the person’s size, for instance a 6’5″ guy wanting to maintain a 220 lb weight can eat more carbs than say someone who is 5’10” and wants to maintain weighing 165.

    Steve B wrote on January 25th, 2009
  2. Steve B, that’s why we give you a range. If you are way bigger or way smaller, you can also go outside that range a bit

    Mark Sisson wrote on January 25th, 2009
  3. Yeah, in a way I felt like I was being told I could not lose weight on 150 carbs or less per day above, but being how obese I am, I can lose this way for a long time. I am 33 yrs old by the way. A co-worker in his late 50s found out he had type 2 diabetes and he went on a plan of 150 carbs per day or less and he went from weighing about 260 to about 180 in about 8 months on his 5’10” inch frame by eating that way. Inspired by his success I am now succeeding at it too. This is the longest I have succeeded on an restricted eating plan in years.

    Steve B wrote on January 25th, 2009
  4. Congratulations on your success so far, Steve. Keep it up!

    jesse wrote on January 26th, 2009
  5. Mark,

    I consume a lot of carbs- averaging 250-300 grams per day, about 150 grams of fat and about 70 grams of protein average day. Weight 68 Kilos at 6 feet.

    Almost all my carbs comes from carrots ( i eat raw carrots about a kilo for lunch at times), bananas, sweet potatoes, oranges, apples. I do have digestion issues if i eat too much wheat or grains. a slice of bread sometimes is ok. my question is..are grains real issue or carbs in general?

    Amit wrote on January 27th, 2009
  6. Amit, Depends. How old are you? Do you exercise a lot? What is your body comp or body fat? Grains are definitely a big part of all this, but excess carbs from other sources are still a potential problem. If not now, then maybe iinto the future. OTOH, you may be a lucky one who lives comfortably on the higher end of the carb curve.

    Mark Sisson wrote on January 27th, 2009
  7. Mark,

    is there a protein curve? or can we basically eat protein ad infinitum (slight exag. there, but provided we eat it with fat, fruits and veggies)

    Roelant wrote on January 29th, 2009
  8. funny that fats are not good for you!

    sameul McGivens wrote on February 19th, 2009
    • Your comment seems rather random. And many fats are not only healthy, but essential.

      Avi wrote on May 23rd, 2011
  9. For the last 2 weeks I have not eaten refined sugar, white flour etc, but my carbs do creep up, the average is 130-180g per day.

    is this OK? I hate attached todays nutrition here:

    I walk for 1-2 hours per day, sprint once per week and lift heavy weights for 1 hour 3x per week.

    I am thinking that since the carbs come from lentils which i consider a ‘healthy’ food that this is ok…although wonder how absolute the ‘100g per day of carbs’ rule is.

    any thoughts?

    alex wrote on May 7th, 2009
  10. ps. I want to gain at least 3kg of muscle and find it very difficult to gain weight in the past – easily lose it if my calories drop below 2500kcal/day

    alex wrote on May 7th, 2009
  11. Alex, you are on the right plan. If you want to build muscle, your body has to “need” the extra muscle. The only way that happens is for you to work out more intensely (not more time) so signals arer sent to your genes to add strength and size to muscle. Your calories are probably OK now, even a little high. I would cut back on the lentils a bit. I don’t know your body fat, but I wouold suggest that to gain muscle from here, you might want to reduce your walking a bit for a few weeks and see what happens. Ultimately, you may find that the body you have now is the ideal one for the amount of work you do…unless you increase the load on it.

    Mark Sisson wrote on May 7th, 2009
  12. Mark,
    I have lost 15 lbs since about mid-Feb going from 167 lbs to 152 lbs by doing fairly high intensity cardio, circuit weights 2-3xs weekly with some yoga and pilates thrown in. My plans are to lose another 10 lbs the same way. Since about mid-April, I have kept my carbs to 100-150g per day and try hard to eat 1200 -1500 calories a day. The trouble I’m having is getting enough protein because I am lactose an soy intolerant and I just can’t tolerate meat 3xs daily. I tend to compensate with nuts (good?), peanut butter and boiled eggs. I think this might be leading to high levels of selenium on my fitday chart. Can you recommend a few non-meat sources of protein excluding dairy and soy?

    Thanks a bunch,

    Tracy wrote on May 7th, 2009
  13. Tracy, good work so far. All I can add for non-meat protein is chicken and fish (of course) and then find a good protein powder and have a soothie once a day. You should be fine getting 100-120 grams protein total each day.

    Mark Sisson wrote on May 7th, 2009
  14. Mark,

    I appreciate the time you take to reply us :)

    I am currently around 18% body fat – according to a cheap electronic device. I am 185cm tall and weight 72.5 kg. I aim to reduce body fat a few points and also to bring my overall body weight up to at least 75kg.

    It’s interesting that you say my calories are maybe slightly too high – on fitday it says I burn about 3100 per day just through my metabolism, walking and lifting 3x per week.

    Regarding intensity – I always used to work chest/triceps, back/biceps and legs/shoulders with 3×10 reps. Now I have changed my plan since 2 weeks ago:

    I now do the whole body and use a 5 second up / 5 second down cadence for much higher time under tension, and I usually do 5 sets of 5. This means I do about 20% less weight than before, 5 less reps in total, but double the total time under tension. If you have any thoughts on how effective this is at stimulatng muscle mass gain I’d love to know :)

    alex wrote on May 8th, 2009
  15. i found a product called ‘Just carbs’ (

    It lists ‘Insulin Spike’ under product information!!!

    alex wrote on May 8th, 2009
  16. I have been losing weight after reading (my age 50)the “Protien Powder” I started in Nov-08 and now in May have lost 55 lb (280-225) I keep between 0-30 grams of carbs a day and i work two jobs 16 hour days. I take a host of supplements and protien powder drinks along with meat protien and low carb wraps (3-grams-per wrap) and have salad at least once a day. I work out on average 3 days two- three hour workouts. I feel great and dont miss the carbs. i will congtinue this way for at least 30 more lbs (loss) and will bring up carb intake to 50-carbs to loose additional 15-25 lb to bring my weight down to a healthy 175 LB. My question is i read in a nutriontion book for dummies that a healthy carb intake level is 130 carbs for brain and heart function and anthing lower will be harmful. Can i maintain a helthy lifestyle at 175 lbs on 100 carbs a day with an increasae of power- lifting? Thanks i enjoyed your blog and the added responces were very informative.

    Harry Rionero wrote on May 10th, 2009
    • You lost weight after reading “protein powder”?

      Avi wrote on May 23rd, 2011
  17. Harry, congrats on your great progress. There is no nutritional requirement for carbs in the human diet. The body makes up to 200 grams a day from the protein and fat you consume. So, yes, you can maintain a totally healthy lifestyle and even increase powerlifting on 100 grams carbs/day. There’s no reason to do two-to- three-hour workouts, though.

    Mark Sisson wrote on May 15th, 2009
  18. Hi mark

    what’s your view on a south beach type diet? Is the induction phase a good kick off?

    M wrote on May 16th, 2009
    • South beach has it’s good points. Induction phase is best. I think they allow way too many carbs, grains, etc later on.

      Mark Sisson wrote on May 16th, 2009
      • The South Beach Diet would be good if they didn’t have so many artificial, strange foods in the plan.

        Low fat foods, fake eggs. why not just eat real food?

        The one really good thing about it is the recipes from South Beach Florida. The seviche is particularly good and illustrates the point that food that is healthy can be extremely delicious and satisfying which I think is the key to success with any diet plan.

        Louise wrote on May 28th, 2009
        • I lost weight in the Induction phase of SBD, but as soon as I re-introduced whole grains, all the “healthy” ones – brown rice, whole wheat, barley etc. – I started gaining weight, so I’m back to Phase 1 + fruits + a small amount of grains. I would ultimately like to go fully Primal.

          Mamatha wrote on June 7th, 2009
  19. Hi Mark. First of all .. What a fantastic site you have. I’ve cut my carbs right back from way over 300g a day to between 50-120g a day for three weeks now. My weight started at 292 pounds and now just after three weeks i am down to 267, a loss of 25 pounds !! The first two weeks the weight just fell of due probably to water loss. This last week i have not lost much at all, just a few ounces. Will this be a slow process to lose weight Mark ?

    Paul wrote on May 16th, 2009
    • Paul, great work so far. Off to a good start. Understand that after the initial shock to your body, most people can settle into a comfortable 1-2 pounds per week of FAT lost indefinitely – or until you hit a desirable body composition. For you, staying well under 100 grams total carbs per day will be key for a while. Walk as much as you can and do a few weight sessions each week. The concept of “slow process” mean nothing if you can change your body composition for the rest of your life in a way that is basically painless and requires little in the way of sacrifice (other than eliminating sugars). Keep us posted!!

      Mark Sisson wrote on May 16th, 2009
  20. I don’t think Mark ever answered the question regarding “net” carbs, but I’ve taken a look at his fitday and the way he writes about it, and he’s *including* fiber in the total number.

    Which, of course, makes it a LOT harder to hit that 100 mark. I can easily hit 150g total with about 100 net by eating normal healthy primal-like foods, but to get the total number below 100 I actually have to make decisions like, “tomatoes or cucumbers?” or “eggs or avocado?”. OR, I must strike out the little “add-ups” like a Viactiv calcium chew or that “2 bites of sandwich” that I would normally, being a foodie with friends who let me taste… despite the fact that those are very enjoyable on a day to day basis.

    Sorry, long comment to deliver a short answer.

    abqandrea wrote on June 1st, 2009
  21. I take in 50-100 g per day and I have found through experimenting that is where I need to stay! It’s funny how some people are so different with their cab allowances. I blow up if I take in more than 120 for too long.

    women's exercise wrote on June 2nd, 2009
  22. Sorry for my ignorance and my bad english, Then, if i eat 100gr of carbs or less i will not win weight NO MATTER how many calories i eat? Just curious, Thanks

    hector wrote on June 3rd, 2009
    • Hey Hector, I think it depends on the person – for me if I keep it around 50g or so I can eat a heroic amount of calories and not pack on the pounds. Some people are less sensitive and can go up to 150g or so. I like having the wiggle-room with the carbs just in case I end up under-estimating…

      The great thing is – with all the fat and protein you get that ‘satisfied’ feeling much quicker than with carb-y nutritionally-empty foods. So even on days where I think I’m eating massive calories, its nothing like what “massive calories” would look like for a high-carb “conventional” meal.

      Ryan Robitaille wrote on June 12th, 2009
  23. I am a nutritionist – and I love this carbohydrate curve – it is spot on in my experience. I am an RN who discovered the zone diet some 12 years ago, did some uni papers a couple of years ago to get to degree level in human nutrition, discovered they still push the whole grains a lot – though the carb / protein ratios are being explored in some of the papers. I’m still not convinced about grains. I’ve gone way more paleo, virtually no carbs now since starting crossfit 2 months ago. I can say definitively that the very best diet for me now is primal with a ratio of 1:1 carbs and protein and some good fats, (not too much though). I am 110 lbs and 5′ 2″ almost 50, I have arund 80 – 100 gms of both carbs and protein a day. I supplement with a range similar to Marks multi, plus omega 3, vitamin D and probiotics.
    I’m never felt better. As a result of these cahnges, right now I am at pretty much ideal weight, but still want to see my abs (working on it!) All the things I suffered prior to diet, exercise and supplements have gone – cravings, PMS, severe menstrual pain, low energy, excess weight, reactive hypoglycemia, pre- menopausal symptoms, constipation. Also gone swollen knees (auto-immune, vit D and omega 3 helped here). ALL gone.

    I for one will help spread the word through my work.

    Julianne wrote on June 24th, 2009
    • That’s great Julianne. I had severe chronic fatigue and buy eating lots of healthy fats and limiting carbs I too have seen a great improvement in my health.

      If I eat a few too many chips or something it starts going downhill pretty quick. I am getting certified as a nutritional counselor so I can share this vital information more effectively.
      We are here as a testimonial that this way of eating really works!

      Louise L wrote on June 24th, 2009
  24. One question I have is on fiber. If I eat 30-40 grams of fiber a day (which is where I have been the last few days) do I subtract that from the carbs that I have eaten. For example, I ate 175 grams of carbs yesterday. Do I subtract the 34 grams of fiber and apply it to my chart above? So am I really in the 141 gram range, or on the 175 gram range?

    Richard Hasting wrote on June 25th, 2009
  25. Primal Blueprint looks at gross carbs, so you are at 175. 30-40 grams of fiber a day is a lot of fiber.

    Mark Sisson wrote on June 25th, 2009
  26. I need to stay below 40 because I’m T2 diabetic and my BG is still int he 120s even with metformin 500 XR twice daily!
    I think I need to cut them even lower until I lose my fat at least. I need to lose 150 lbs still.

    Linda wrote on July 5th, 2009
  27. If you say all carbs get turned into sugar whats makes the carbs from berries and fruit any different than grains, if two people get 1500 calories from primal and one gets 500 from grains the other 500 from berries do you think their will be an body composition changes? I don’t.
    Mark I doubt you will answer this or even consent to the posts existence.

    Bob M wrote on July 6th, 2009
    • Bob, if I responded to every comment here, I would never have time to work (to pay for this “free” site). Most of the time my knowledgeable readers do very well answering questions in the comment section without my input. Also, in most cases, we’ve covered the topic ad infinitum over the past three years and 3,000,000 words. This post is just a snapshot. That’s why I wrote the book.

      All carbs do turn to “sugar” as you put it. But…the 500 calories from grains will also contain gluten, phytates, lectins and other antinutrients in addition to the glucose load. You can get 500 calories of pasta, bread or cereal in a fairly small amount of food. Conversely, 500 calories of berries is a significant bulk of food (it would take over six cups of blueberries)…and even if you did eat it all, you’d get antioxidants, polyphenols and other beneficial phytonutrients along with some low-glycemic fructose. It’s not always just about the carbs.

      Mark Sisson wrote on July 6th, 2009
  28. Great site here! Anyone care to take a stab at how many “net” carbs I should eat daily? I’m female, 5’5 1/2, 231 pounds, 38 yrs old, just joined a gym where I’m walking 1 hour, 3-4 times a week building up to 5-6 times a week. I’m on Benicar for high blood pressure. Doc said I can get off the med if I loose 40-50 lbs. I’ve done Sugar Busters in the past and lost 18 pounds in 6 weeks so I know my body responds well to lower & better carbs. I hope it’s okay to ask this here. If not, sorry in advance.

    Irene wrote on July 12th, 2009
  29. Hey Irene,

    If you decide the MDA approach is the way to go, I would wager heavily that next 4th of July you will love “the new you.” Please do give yourself this gift that you so deserve ! Best wishes with your health and wellness.


    Eddie wrote on July 12th, 2009
  30. As a Type 2 diabetic of 24-years, I found that I needed to keep my daily carb level at 50 or less. By doing so, I have been able to get off all my diabetes meds (Byetta, Metformin & Levemir). I was in fair control before I started this in January of this year (2009), but I expect to have the glucose numbers of a young healthy person soon.

    David wrote on August 3rd, 2009
  31. Hi David,

    That’s great! You’re are making real progress. Proving that taking control of your own health really works.

    I suggest a few things that should really make your efforts take off. If you make sure not to eat too much protein, you will also help control your blood sugar because 1/2 of all protein can be converted to glucose. I know this because I help my husband with this. Also, make sure that your fat intake is around 80% of your daily totals. Why? Because this will really lower your blood sugar and it’s how sugars were controlled before insulin was developed. There is a doctor in Europe who helps people who are so sick that they are facing amputation and he brings them back from the dead doing this. His name is Dr. Jan Kwasniewski, M.D. He is a Polish Doctor who created The Optimal Diet. Just make sure the fats are healthy. See my fat page for this.

    Louise - Curemyfatigue wrote on August 3rd, 2009
    • Thanks, Louise,

      One day last week I converted my diet into calories by macronutrient and, that day, my diet was about 70% fat. I’m sure it was inaccurate but was probably in the ballpark. I do eat coconut oil and will be interested in seeing my lipid panel at the end of this month. Hopefully the numbers will back up the good things I’ve read, and not the dire predictions of the cardiologists I’ve mentioned it to. I also eat almonds and, tomorrow, I am driving to pick up 1/2 of a grass fed cow – the farmer is about 1.5 hours away. I have read The Optimal Diet. I don’t think the total amount of protein in my diet has changed much, perhaps a little. Thanks again for your tips.

      David wrote on August 3rd, 2009
  32. Thanks so much for this information! I was looking all over for a daily carb intake listing, and this was perfect! I now now that I’ve been maintaining pretty well in the Primal Blueprint Maintenance Range. :)

    Adjo (ey-joe) wrote on August 14th, 2009
  33. HEY READ THIS!!!!

    i’ve gone through the charts and the USDA recommends i eat 130 g carbs a day, which actually hits inside your maintenance range. i’m currently doing about 50-60 g carbs a day, and i would say that is best for me, but still… what exactly is the problem with the USDA guidelines, as is? who cares about the USDA, anyway? booo, i say!

    jellysoda wrote on August 27th, 2009
    • The USDA wants you to base your diet on grains and 45-65% carbs

      LittleMissGrok wrote on August 27th, 2009
  34. Just started the book and was wondering about the “whole grain issue” as it relates to having Oatmeal every morning…. which I do. Some diets close to the Primal concept like the Zone think Oatmeal is a “good carb” and an exception to “the rule”….. What say anyone else on this?

    Tom Skinner wrote on September 17th, 2009
    • Hey Tom,
      oatmeal is technically gluten free, though most manufacturers do it on lines where other gluten products are processed so if you aren’t buying gluten free oatmeal…it still has gluten in it.
      Also, oatmeal has avenin protein in it, which appears to have similar effects to gluten. I would just stay away from grains as much as possible, all of them…including rice, corn, quinoa, etc.
      it still is a carb, so choose wisely what you choose for the day!

      danielle wrote on October 4th, 2010
      • Quinoa is not a grain.

        Avi wrote on May 23rd, 2011
        • grain, kernel, seed…it is the part of the plant that it needs to reproduce itself and should not be eaten because it contains toxins.
          Coffee and cocoa, soy, peanuts fall under that category, too. So do nuts.

          But, MDA allows Chocolate, coffee and nuts in small amounts.

          Arty wrote on September 25th, 2011
  35. Hi all, Im on a doctor restricted diet and doing well 18 pds down last month. Im 152lbs ‘5ft 5″ so im going on vacation and its imperitive to my diet that i dont gain more then 2 lbs. from what i gathered from this site is if i stay around 50 carbs i should be able to maintain my current weight? thanks for any input. michelle

    michelle wrote on September 18th, 2009
  36. Sam
    you’re very wrong with your analysis as there’s no way to determine wether humans ate animal or plan sources from bone scans.

    That being said the norm was not ketosis but fat metabolism (which involved ketones anyway, no matter if you eat lot of carbs) at rest and carb metabolism during spurts of energy. As Jared Diamond noted the majority of hunter-gatherer societies that live in condition almost identical to the one paleo humans ate, are very organized in gathering and they’re in hunting and they always have a supplies of nuts, seeds, fruits, vegetables. All the primitives Jared interviewed said they thought leaves were the healthiest curative foods and that no human could do without them.

    I read a book about the traditional Innuit culture and they not only ate berries and Nikkaru (the veggie-based stomach contant of caribou) but they also made huge efforts to make sure they have plant matter to eat other than meat.

    Danny wrote on October 2nd, 2009
  37. Glucose is not a poison.
    It seems to me that the concept that every carb turns into “sugar” (well, glucose) is used as a way to suggest that eating whatever carb is like eating white sugar.

    But the point about glucose is not what glucose does per se but whether we allow the body to make good use of it.

    According Dr. Jan Kwasniewski there’s no point in forcing the body to convert proteins into glucose and it’s therefore better to eat as many carb as much glucose is needed to fuel the brain.

    This is perfectly in tune with Mark figures.

    So we’re supposed to get enough carbs to fuel our brain and certain bursts of intense activity and to get energy at rest, at night and between meals from fat metabolism.

    So glucose per se is harmless and usefull. In fact not only every carb becomes “sugar” but also at least 50% of protein, when a very low carb diet is followed, are turned into sugar.

    So eventually everything turns into sugar. The point though is whether you’re using that sugar to fuel needed process, or wether that sugar is in excess and is going to be stored.

    Sugar is a quick-burning fuel that can’t be stored in any big amount.
    Hence by its very nature it is supposed to fuel short-term intense activity.

    Fat on the other hand is a slow-burning fuel that can be stored without limit and even thin people have enough fat to survive for 30 days without eating.
    Hence by its very nature it is supposed to fuel us at rest, between meals, at night.

    The problem with poor high-carb eating is that people switched the two metabolism, training their body to expect sugar to fuel everything including at rest. That’s why people are suffering from low-blood sugar, hypoglycemia at night, mood swings and tiredness after a meal; because their body is accostumed to burn sugar exclusively but the body quickly runs out of it burning also the glucose that should be needed for the brain.

    If we just train the body to burn fat at rest and between meals again, we won’t need an ultra low carb diets or revolting no carb diets and won’t even need to call sugar (aka glucose) a poison.

    Danny wrote on October 2nd, 2009
    • How do you train the body to use fat as a fuel source other than not over eating carbs?

      You don’t even need to train the body to use fat. It just will in the abscence of “sugar”.

      Why people think that 100-150 grams of carbs is “low-carb” is beyond me. It is kinda hard to even reach 150 grams if you are not eating food with added sugar.

      puddingtime wrote on October 2nd, 2009
      • I should have said “retrain”
        Anyway you re-retrain the body to burn mostly fat by stopping eating more carbs than you can use.

        Since the brain alone burns around 90 grams of carbohydrate and glycolitic enzyme are upregulated and angry for sugar immediately after a bout of intense activity, 100-150 grams of carbs is a good amount to fuel those processes that are better suited for carbs and letting the body burn fat at rest, preventing the sugar crash many people experience nowadays.

        Eating nuts, veggies and fruits you can easily reach those numbers without problems. In fact dieters in the first stages of Atkins complain of how hard is to maintain their carb low enough even eating just veggies. They quickly add up.

        Danny wrote on October 2nd, 2009
        • Sounds pretty logic to mee. Good stuff, made me think that ketosis may not be that good? Maybe more ideal to stay just out of it?

          George Clooney wrote on April 13th, 2010
  38. I believe in the long-term health benefits of low-carb eating. That said, I’ve always been ‘slender’ (NOT skinny, I hate that word!) and have to work to maintain my weight. I’m a very active 5’4 and 117lbs. How does a person like me keep my weight with meat, vegs, nuts and fruit? I always end up losing. Any suggestions welcome.

    Jackie wrote on October 7th, 2009
    • Raw dairy is your friend.

      Arty wrote on September 25th, 2011
  39. All wild mammals have a dietary consumption of 3-5g of protein per day. This is obtained by either direct consumption in carnivores or gut fermentation in herbivores.

    On a natural grass diet cattle They obtain nearly all their energy in the form of amino acids and volatile fatty acids via gut fermentation. Cattle despite being strict vegetarians gain about 25% of their energy from protein and 75% from fat. They get virtually no energy from carbohydrate. Grass fed cattle have a body fat content of <1%.

    I have 20 years experience as a food scientist.

    food dood wrote on October 26th, 2009
  40. Only your red blood cells, retina and a tiny part of your brain require glucose – no more than 60g per day. Many cells such as those in the heart muscle and the cells lining the gut can only use fat for energy.

    food dood wrote on October 26th, 2009

Leave a Reply

If you'd like to add an avatar to all of your comments click here!

© 2015 Mark's Daily Apple

Subscribe to the Newsletter and Get a Free Copy
of Mark Sisson's Fitness eBook and more!