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

Dear Mark: What Are the Differences Between Vitamin K2 MK-4 and MK-7?

For today’s edition of Dear Mark, I’m answering a question about the different forms of vitamin K2. Everyone knows the importance of vitamin K2—at least around these parts—but very few understand the differences between the various forms of vitamin K2. What are the respective benefits of vitamin K1, vitamin K2 MK-4, and vitamin MK-7? Where can we find each one?

Let’s find out:
Hi Mark,

Have you ever done an in-depth look at the differences between vitamin K2 MK-4 and MK-7?
No. I’ll do one now.

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13 Keto Frozen Treats

A special thanks to Courtney Hamilton at Paleohacks.com for today’s keto recipe roundup.

Popsicles, ice cream, and icy drinks—did you say goodbye to all these summer treats when you embarked on a keto diet? Well, with these recipes, you can have your frozen goodie and fuel ketosis, too.

These low-carb frozen keto treats include everything that’s great about an icy-cool dessert, but cut out all the sugar, additives, and excess carbs.

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10 Keto Hacks to Try…Or Not

When I say “hack” or “biohack,” what does that call to mind for you? Taking 20 supplements per day, shining special lights into your ears, stem cell injections? Simpler things like wearing blue light blocking glasses or turning your shower to cold for 30 seconds?

The term has become ubiquitous in modern parlance, to the point where its meaning has become blurred. On the one hand, hacking can be about optimizing—taking your health and fitness to the next level once you have the basics dialed in, or adopting strategies aimed at living well over 100. On the other hand, a hack can also be a shortcut or trick designed to reap certain benefits without putting in the usual work. (Whether that’s a clever maneuver or a form of “cheating” depends on the context and whom you ask.)

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Dear Mark: Safe Tick Repellent, Fish Intake on Mediterranean Diet, and Therapeutic Value of Wine

For today’s edition of Dear Mark, I’m answering a few questions from recent comment boards. First, with all the scary tick-related news coming out lately, are there any non-toxic tick repellents that actually work? Are there essential oils that repel and/or kill ticks? Is there a safer way to use insecticides? Next, were the people in the Mediterranean keto study actually eating a kilo of fish on their fish days? And is the wine an important part of the Mediterranean diet? Is the wine therapeutic or just for pleasure?

Let’s find out:

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15 Low-Carb, Keto-Friendly Desserts

A special thanks to Courtney Hamilton at Paleohacks.com for today’s keto recipe roundup.

Yes, you can have desserts while on keto! These totally sugar-free and low-carb recipes prove that it’s not only possible, but also deliciously satisfying.

The trick to keto desserts is relying on healthy fats to provide richness while using low-carb sweeteners like monk fruit or stevia.

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What is Mediterranean Keto?

As I’ve written before, although most people’s lipid numbers improve across the board, some people get interesting cholesterol responses to Primal ketogenic diets. LDL skyrockets, even LDL particle number. The jury’s out on whether or not they indicate negative health concerns or if keto dieters are a special breed that hasn’t received enough study. (There may be a few genetic profiles, such as APOE4 carriers, that react differently to certain dietary inputs.) Either way some people just want their cholesterol numbers to look good in a conventional way. These days, whenever I run into someone in the real world with these or similar concerns, I tell them to try “Mediterranean keto.”

What is that, anyway?

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