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

Archive for the ‘ Dear Mark ’ Category

20 Jun

Dear Mark: Primal Sun Protection and Stigmasterol Stability

For today’s edition of Dear Mark, I’m answering two questions. First up concerns the effect going Primal has on your skin’s resistance to sun damage. While there isn’t any specific research examining ancestral eating and sun damage, several lines of evidence suggest a protective effect. Second, what’s the deal with stigmasterol, AKA Wulzen anti-stiffness factor? […]

13 Jun

Dear Mark: Bikram Yoga; Stored Toxins Impairing Fat Loss

For today’s edition of Dear Mark, I’m answer two questions from readers. First, does Bikram yoga qualify as sprinting or high intensity training? It’s certainly intense, and it’ll make you sweat bullets and work hard to the point of nausea, but does it actually accomplish the same training effects as sprinting or intervals? Find out […]

6 Jun

Dear Mark: Dried Sardines, Pullup Alternatives, and Blood Donation for Women

For today’s edition of Dear Mark, I’m answering three questions from readers. First concerns an alternative form of a food I’ve always urged people to consume: small dried whole fish. Are the omega-3s still viable after the drying process? Next, pullups are a fantastic exercise that everyone with the ability should perform, but not everyone […]

30 May

Dear Mark: Are Probiotics Useless, Gluten-Free Diets Dangerous, and GMOs Completely and Utterly Safe?

For today’s edition of Dear Mark, I’m answering three questions from a single reader who just read an article from Vice. The article makes pretty bold assertions about topics that have already received a good deal of attention here on the blog. First, are probiotics actually useless? A new study cited in the article seems to […]

23 May

Dear Mark: Cycling Harder Than Running, High-Fat Football Training, and Orange Theory

For today’s edition of Dear Mark, I’m answering three questions about training. First, why might cycling feel harder than running at the same heart rate, and what should be done about it? Second, is it safe or smart for a footballer to try to become a fat-burning beast when he’s currently in-season? Are there lessons can […]

16 May

Dear Mark: Higher BMI and Mortality Risk, Calories When Meal-Skipping, HIIT After Fasting

For today’s edition of Dear Mark, I’m answering a couple questions from you guys. First, there’s a new paper out claiming that the ideal BMI for overall mortality is an overweight one—27, to be exact. Is this really the case? Should we all pack on a few extra pounds to see us through into old […]

9 May

Dear Mark: Lead in Bone Broth, Cooked and Cooled Potatoes, and Stress Strategies

For today’s edition of Dear Mark, I’m answering three questions. First one concerns the lead content in bone broth. A 2013 study reported elevated levels of lead in chicken bone broth. And not the canned or boxed stuff, but the real thing: broth made from actual chicken bits. Should you worry? Second, do cooked and […]

2 May

Dear Mark: Is Caloric Density the Answer?, Fat Starving the Brain, and High-Intensity Primal Endurance Training

For today’s edition of Dear Mark, I’m answering three questions from readers. First, should the primary focus in constructing a healthy diet be caloric density? Is the key to weight loss and optimal health the consumption of bulky, low-calorie foods? Next, a new study seems to show that fat “starves the brain.” Is this true? […]

25 Apr

Dear Mark: Saturated Fat Jet Lag, Collagenous Amino Acids, and Different Cutting Diets

For today’s edition of Dear Mark, I’m answering three questions. The first concerns a recent study seeming to show that saturated fat disrupts our circadian rhythms, especially saturated fat at the wrong time of day. Should we—yet again—trade butter for soybean oil? Second, how necessary are the amino acids found in collagen? Aren’t they found […]

18 Apr

Dear Mark: Just Outside of Goal Weight, Skipping Breakfast and Coffee, and Quark

For today’s edition of Dear Mark, I’m answering four questions. First up, I discuss what to do—and really, what not to do—as you approach your goal weight but keep coming up short. Second, why do breakfast skippers also tend to be the biggest coffee drinkers around? Is it just correlation or is there a causative […]

11 Apr

Dear Mark: Vegetarianism Causes Cancer?; Glucosamine Useless?; Decision Fatigue Debunked?

For today’s edition of Dear Mark, I’m answer three questions. First, does long-term vegetarianism cause cancer or alter our genetic code? Some media coverage of the latest vegetarianism study seemed to suggest as much. Next, is glucosamine just totally useless if you’re not going to fork out a ton of money for pharmaceutical grade stuff? […]

4 Apr

Dear Mark: Do I Need to Eat More, Testosterone Levels, HRV and Carbs

For today’s edition of Dear Mark, I’m answering three reader questions. First, if things are going well on a relatively low-calorie intake, should you just keep on keepin’ on or should you increase food intake to “get ahead” of your needs? Next, what’s the deal with a study showing a high-carb diet is better for […]

28 Mar

Dear Mark: Staying Aerobic, Glycogen Depletion, and Sleep-Low for Strength Training?

For today’s edition of Dear Mark, I’m answering three reader questions. First, do anaerobic workouts—sprints, lifting, etc.—interfere with your ability to become a fat-burning, aerobic beast, or can you integrate them? Next, in last week’s post I talked a lot about glycogen depletion in the context of the “sleep-low” carb partitioning. How can we actually […]

21 Mar

Dear Mark: Bodyweight with Weights; Glycemic Index Versus Load

For today’s edition of Dear Mark, I’m answering a pair of questions from readers. First comes from Gaspare, who heard me talking on Joe Rogan’s podcast in January and wonders whether bodyweight training and weight training can complement each other. It turns out they can. Then, I discuss glycemic index, glycemic load, how foods can have […]

14 Mar

Dear Mark: Red Blood Cell Fatty Acid Content and Obese Paleo Figurines

For today’s edition of Dear Mark, I’m answering a pair questions that, well, question some of the fundamental principles of Primal living and eating. First up concerns a study seeming to show that linoleic acid (from seed oils) is a healthier, less inflammatory choice than olive oil or fish oil. Could it be true? Find out […]

7 Mar

Dear Mark: Do High Protein Diets Cause Colon Cancer?

For today’s edition of Dear Mark, I’m talking about a new rodent study has just been released that seems to identify the general low-carbish, Primal-ish way of eating as bad for GI tract health. I know, I know. It seems odd, especially since so many people get relief from digestive disorders, inflammatory bowels, and irritable guts after […]

29 Feb

Dear Mark: Grass-Fed vs Grain-Finished, Lamb Feedlots, and What About Grass-Fed Eggs?

For today’s edition of Dear Mark, I’m answering a few questions about grass-feeding several of you raised in last week’s comment section. First, is there a difference between grass-fed and grass-finished?What is the difference between grass-fed and grass-finished? Next, is it true that lamb is by definition grass-fed? Are there actually lamb feedlots, or can we […]

22 Feb

Dear Mark: Paleo Diet Fattening?

For today’s edition of Dear Mark, I’m answering one question. It’s a burning one, though, judging from the deluge of emails I’ve received in the past few days. A new study has just come out purporting to show the deleterious effects of a “paleo diet” on weight gain, fat gain, and glucose tolerance in type […]

15 Feb

Dear Mark: A Few Collagen Questions

For today’s edition of Dear Mark, I’m answering some questions from the comment board of last week’s collagen post. You guys came up with some really interesting, useful ones that deserve closer examination. First, I explore whether—and how—increasing one’s collagen intake could conceivably worsen a person’s lipid profile. There’s actually a possibility, believe it or […]

8 Feb

Dear Mark: How Many Sprints Per Week, How to Play and Train with Babies, and the Best Nighttime Snack

For today’s Dear Mark, I’m answering three questions. First, how often can a person sprint safely and effectively? There are many factors to consider when determining the amount of sprinting a person can handle each week, like stress levels, sleep, and other training, so it’s tough to give a specific number. Next, what are new parents […]

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