Weekend Link Love – Edition 460

weekend_linklove in-lineRESEARCH OF THE WEEK

Preformed vitamin D, the kind found in eggs, fish, and meat, is about 5 times as bioactive as vitamin D3. This makes animal foods a rich source of vitamin D and may explain why human skin lightened after the adoption of agriculture—so they could replace the vitamin D they no longer got from hunted meat.

Deficiencies of carnitine (a nutrient found in meat) may explain some autism cases.

Some people may be overdoing vitamin D supplementation.

Given a prompt, airport visitors are more likely to walk than ride the people-mover.

Using alcohol to reduce executive control improves creative problem-solving (but not divergent thinking).

Reducing dietary advanced glycation endproducts has no effect on inflammation or cardiovascular health in overweight/obese adults.

Life purpose increases sleep quality.


Episode 177: Dr. Loretta Breuning: Host Elle Russ chats with Dr. Breuning about her research into the best way to manage these crazy neurochemicals we’ve inherited from our ancestors.

Each week, select Mark’s Daily Apple blog posts are prepared as Primal Blueprint Podcasts. Need to catch up on reading, but don’t have the time? Prefer to listen to articles while on the go? Check out the new blog post podcasts below, and subscribe to the Primal Blueprint Podcast here so you never miss an episode.


My 10 favorite high-fat Primal keto recipes—a guest post I recently did for Greatist.com.

Fighting yourself to lose weight (or do anything) never works.


How useful are gut biome profiles?

Activity trackers have the potential to provide great data for analyzing population health, but there’s still a long way to go.


Trade routes during the Copper Age spanned long distances.

For all our access to artificial lighting, our daytime light exposure is downright pathetic.

You make your own barriers.”

The Vatican has outlawed gluten-free bread for Holy Communion.

This past winter, California storms destroyed the only road leading into and out of a small community in Big Sur, forcing residents to hike everywhere. You’ll never guess what happened to their health.

Another reason not to eat boxed mac and cheese.

A religious tradition everyone can get behind.


Facebook live event I’ll be doing: Hang out with celebrity nutritionist, Primal Kitchen Cookbook contributor, and Body Love author, Kelly LeVeque, as she takes a deep dive into her health and wellness journey with me and Primal Kitchen COO, Morgan Buehler, on July 21 at 11 AM Pacific.

Contest I’m excited about that ends tomorrow at midnight—so hurry: This one. Win a Primal birthday cake kit.

Big announcement I’m excited about: The South Bend, Indiana, Primal Kitchen restaurant is officially opening on July 21! Go give ’em (and your micronutrient profile) some love.

Success story I’m digging: Andrea Boyer took her health on a 180º with Primal principles after being diagnosed as pre-diabetic and with Celiac. Today she’s loving life and coaching others to take back their vitality.

I want some: Avocado pit totems.

Concept I’d never considered: Tennis grunts are strategic.



One year ago (Jul 16– Jul 22)


Mice eating their bones – that’s self-sufficiency!

– You reminded me of something, Catherine. The day I turned 18, my parents kicked me out of the house. One of the most important first steps I took on the road to self-sufficiency was to start consuming my own hair and fingernails for extra protein.

About the Author

Mark Sisson is the founder of Mark’s Daily Apple, godfather to the Primal food and lifestyle movement, and the New York Times bestselling author of The Keto Reset Diet. His latest book is Keto for Life, where he discusses how he combines the keto diet with a Primal lifestyle for optimal health and longevity. Mark is the author of numerous other books as well, including The Primal Blueprint, which was credited with turbocharging the growth of the primal/paleo movement back in 2009. After spending three decades researching and educating folks on why food is the key component to achieving and maintaining optimal wellness, Mark launched Primal Kitchen, a real-food company that creates Primal/paleo, keto, and Whole30-friendly kitchen staples.

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28 thoughts on “Weekend Link Love – Edition 460”

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  1. The Deirdre Larkin youtube was very inspirational, I do believe many people program themselves to believe that aging takes more from us than really needs to happen. The Vitamin D links were interesting, I may need to rethink my intake of D3, I take 5000 IU daily plus I eat sardines quite a bit, think I will scale back.

    1. K1/K2 requirements are measured in micrograms, which is a very small, almost trace amount. If you eat a healthy Paleo diet you probably don’t need to supplement.

    2. Yes. The fact that the article doesn’t mention K2 makes it worthless.

  2. What do you mean they kicked you out? Did they make you find a place to live and work to pay for yourself? I think I remember you said you worked as a contractor. Didnt you go to college for a biology degree?

    1. Is that one reason why you love Ayn Rand so much, because you’ve had to pay your own way?

  3. Loved the list of keto recipes…totally trying the “potato” salad made with cauliflower. And always love freezer fudge…that’s one I even made back in my vegan days. Not at all surprised about the vitamin D findings…totally makes sense to me that the preformed vitamin D from animal sources would be more easily absorbed. Sardines are a great source. And I’m totally a believer in getting some D from the sun…just got back from the pool!

  4. Now I got the answer to my question:
    “Why am I so creative”
    Now I have confirmation: the gin/vodka/whiskey shot

  5. PSA: the people-mover at the airport isn’t for standing in place. It’s there to help you walk faster to the gate that’s a mile away, but must be reached in eight minutes. I feel like the Flash power-walking on those things.

  6. Interesting study on getting people to walk instead of ride the “people movers” as I call them. I love the idea of promoting more activity by simply avoiding those sorts of things. It seems so silly how people won’t get active (either due to time restraints or laziness) yet there are such simple ways to move throughout the day. Take the stairs and park your car a little further from the door, and you already have more far more movement in your day than normal!

    Also just a clarification, it is not a new thing that gluten-free hosts are not permitted in a Catholic Mass. To my knowledge it has always been Church teaching that the host must contain a substantial amount of wheat for the sacrament to be valid. It sounds like this was just recently reiterated, but the article made it sound like this was a new “rule.” The explanation of the reason behind that gets pretty philosophical pretty fast, but suffice it to say it follows necessarily from other Catholic teachings of sacraments and the Eucharist. It is not meant to exclude gluten-free people at all.

    1. It is unfortunate that the archaic laws of the Catholic Church make it something of an exclusive organization, but that’s always been the case. Apparently they either don’t know or won’t recognize that the wheat Jesus ate has long since been hybridized out of existence.

      1. Once the church decided that you can literally eat the body of Christ in crackers and drink his blood in the form of wine, they kind of lost all authority to decide what type of bread is capable of becoming little pieces of Jesus flesh. Once you jump the shark, what’s the point in nitpicking the details?

    2. How does it not exclude people with Celiac’s disease? They are expected ruin their health in order to meet their religion’s requirements? Italy itself has a very high incidence of Celiac disease so this certainly does affect and exclude many people from the Catholic rituals.

      1. Either the bread or the wine is sufficient, so if you cannot take the bread, you can take the wine and it is “enough”, so there is no exclusion there.

          1. There is an alternative called mustum, which is fermented grape juice just strong enough to be considered wine, but not alcoholic as such.
            If you are a celiac alcoholic Catholic who feels excluded from Communion because of these issues, please contact your priest.

        1. Do you really want to drink wine from a cup that a dozens of other people have drunk from? I don’t. So it’s exclusion in either case, no matter how you look at it. The Church badly needs to update many of its policies, but that’s not likely to happen. They pride themselves on being rooted in the Dark Ages.

          1. It does not bother me. No one is going to force you to drink from the cup. If you are Catholic and have concerns about taking Communion because of dietary, hygienic, or substance abuse problems, talk to your priest.

            And the Church is rooted about 2000 years ago, not in the Dark Ages. 🙂 But I don’t think people’s issues with the Church’s Traditions and traditions are material to the focus of MDA, so it’s probably best to let that matter rest…

    3. So if you are Celiac you are SOL and bound for hell? Seems pretty silly to me. I can’t believe people still believe this obviously wrong myth.

  7. Summer sun exposure stimulates far higher levels (5-10k IU daily) of D3 production than the recommended dosages. And that’s in our modern world where we live under cover for quite long periods. How did our recent ancestors, or even just outdoor workers, thrive if such levels were dangerous?

    The guidelines for intake of D3 are related purely to those designed to prevent rickets, etc., which is around 400-600mg daily. We should appreciate that a dose to prevent a deficiency is not the same as a much larger dose intended to provide a therapeutic result.

    1. You are right but maybe there is a difference between D3 supplement and D3 made with sun exposure? Just a thought.

      1. Apparently some supplements are D2 and some are D3. I’ve only ever taken D3 which is the kind produced by sunlight.

      2. I, too, suspect there are subtle differences between natural sun-derived vitamin D and the D3 we ingest from a bottle. I’m pretty sure that what we get from sun exposure is superior, but for most of us that isn’t a year-around option. I’m not a fan of tanning booths so I supplement with D3. I have no idea whether the body can actually utilize the supplemental D3 to the same extent, even though its presence does show up in blood tests. My guess is probably not.

  8. On the autism story, I don’t like that they are assuming there are a disproportionate amount of boys than girls who present with milder forms of autism. This is disregarding the reality that girls are often being missed or misdiagnosed. Doctors are expecting girls to behave the same as boys do on the spectrum, but that just isn’t reality. So, for a girl to be diagnosed often takes many doctors and sometimes years. I think ignoring that fact skews the data to be practically useless.
    Also, they have seen a much higher mutation of the MTHFR gene in autistic kids. Although I don’t know that one single thing can be blamed for autism.

  9. I really love the avocado pits art but boy do they have big avocado where they live!

  10. Your older post about headaches….. I went back and read it. I am surprised, being a man of nutrition, health and biomechanics that you did not mention Chiropractic. Chiropractic is a natural, safe, healthy way to treat headaches as many headaches are due to physical misalignment (subluxation) of the spine.

    1. Excellent point. Some people would benefit from seeing a chiropractor and I’ve gone to one in the past. A chiropractor can do a lot for pain. I personally found that when I started supplementing with MSM not only did my neck & back pain reduce but it also eliminated 99% of my migraines. Not sure why that is but thought I’d mention it.