Meet Mark

Let me introduce myself. My name is Mark Sisson. I’m 63 years young. I live and work in Malibu, California. In a past life I was a professional marathoner and triathlete. Now my life goal is to help 100 million people get healthy. I started this blog in 2006 to empower people to take full responsibility for their own health and enjoyment of life by investigating, discussing, and critically rethinking everything we’ve assumed to be true about health and wellness...

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Category: Diet & Nutrition

Can I Eat Fruit On a Keto Diet?

Question: “Can I eat fruit on a ketogenic diet?”

Answer: “Sure, if you want!”

I’m kidding, of course. I know why people ask this question. It’s because in the keto world fruit is a confusing, often contentious topic. You’ll sometimes see keto folks draw a hard line in the sand, saying that all fruits, or sometimes specific fruits, are “not allowed” on a ketogenic diet. I’ve written before about why I feel it’s inappropriate to label foods as “keto” or “not keto.” People need to consider their own goals, health, activity level, and food preferences when formulating their eating strategies.

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15 Easy One-Pot Keto Recipes

Thanks to Paleohacks for today’s awesome keto recipe roundup!
Following the keto diet is a snap with these easy, one-pot recipes!
Skip the complicated recipes and keep dirty dishes to a minimum with these nourishing and delicious keto meals that are anything but boring. Think egg roll in a bowl with ground pork and plenty of deliciously stir-fried veggies, or whip up a quick pesto chicken for a simple Italian-inspired dinner. You can even update the classics with ultra-creamy tuna zoodle casserole.
Whatever you choose, there will be no slaving over a pot. We promise.

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Does Vegetarian Collagen Exist?

I’ll start with the bad news: There are no vegetarian collagen sources. Every collagen supplement you see on the shelf came from a living organism. Though somewhere down the line someone will probably grow legitimate collagen in a lab setting, it’s not available today or for the foreseeable future.

Now, some good news: Vegans and vegetarians probably need less dietary collagen than the average meat eater or Primal eater because a major reason omnivores need collagen is to balance out all the muscle meat we eat. When we metabolize methionine, an amino acid found abundantly in muscle meat, we burn through glycine, an amino acid found abundantly in collagen. If you’re not eating muscle meat, you don’t need as much glycine to balance out your diet, but it’s still a dietary necessity.

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Dear Mark: Iron Followup

Last week’s post on iron levels got a big response and garnered a ton of questions from you guys. Today, I’m going to clarify a few things and answer as many questions as I can. First, do iron and ferritin levels mean different things for men and women? If so, how do those differences manifest? What about premenopausal women vs postmenopausal women? Second, what do we make of the fact that ferritin is also increased in times of inflammation? Is there a way to distinguish between elevated ferritin caused by inflammation and elevated ferritin caused by high iron? Third, is desiccated liver a good option for liver haters? And finally, I share some exciting plague news.

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Is Iron the New Cholesterol?

One thing I’ve realized being in this game for so long is that if you’re convinced that meat truly is deadly, you’re not going to stop looking for reasons why. They’ve tried blaming just about every part of meat over the years, including the protein itself, the saturated fat, the cholesterol, the methionine, the char on BBQ, and even the obscure compounds like TMAO or Neu5gc. The latest component of meat they’ve zeroed in on is iron—the essential mineral responsible for energy production and a host of other vital functions.

The experts’ track record with all the other “evil meat components” has many of my readers skeptical, so they asked me to weigh in on iron.

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Explaining Keto and Hair Loss (and Why Any Dietary Change Might Cause It)

So you start your keto diet, and things are going well. You’re dropping excess fat, your carb cravings are noticeably reduced, your energy is steady throughout the day… and then one day you start to have the sneaking suspicion that you’re shedding more hair than usual. After a few days, it’s unmistakable: your hair is definitely falling out at an alarming rate.

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