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L. Amber O’Hearn on Should Humans Eat Mostly Fat and the Rest Meat?

L. Amber O'Hearn - Peak Human Podcast


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L. Amber O’Hearn has an eclectic background, with academic publications in several fields including theoretical mathematics, cognitive psychology, computational linguistics, and more recently, evolutionary nutrition and biology. She has been studying and experimenting with low-carb, ketogenic diets since 1997, and is particularly interested in evolutionary constraints and interspecies differences. Amber has been eating a nearly plant-free diet since 2009

Use code “PeakHuman” at Nutrisense for $25 off a CGM


At Nose to Tail, we have products such as primal ground beef that includes liver, heart, kidney, and spleen for all the amazing nutrients and none of the hassle or taste you may not be used to. We ship boxes straight to you and have free shipping options. We also have biltong if you want grass finished meat on the go. This is a traditional South African meat snack that’s air dried, soft, and delicious. We have body care products made from beef tallow and only a couple other natural ingredients.

We also have seasonings to go along with these wonderful products and make cooking that much easier. Make a custom box today at and take advantage of the free shipping options. That’s how these interviews are all possible along with all the other content we produce on youtube and social media. Thanks for supporting the ranchers, my other producers, and my team!

The other way you can take advantage of this win-win-win situation is at where we have the Sapien Tribe. It’s a private members community where you get the extended show notes for these podcasts, discounts on NoseToTail products, zoom calls with Dr. Gary and myself, and a lot more. There’s also the Sapien Program if you’d like some help making a lifestyle change. Go to to find out more. Now onto the show!

Also check out our new beef tallow body care products

Biltong (South African air-dried beef specialty)

and custom patch hats

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  • [1:00] - Amber’s background, history, education and interests related to nutrition and a long-term carnivore lifestyle

  • [9:00] - Amber’s introduction in 2009 to keto and carnivore through pregnancy

  • [15:45] - Plant antinutrients and health

  • [24:40] - Carnivore + Fruit and Ray Peat

  • [34:35] - “Zooming out” on Plants vs Meat studies and the risks vs costs

  • [42:45] - Plant compounds, antioxidants and oxidative stress

  • [53:00] - Ineffectiveness of RDA’s based on individual diets and vitamin deficiencies

  • [1:03:15] - mTOR, Valter Longo, and longevity diets

  • [1:14:30] - High fat diet vs. high protein

  • [1:20:35] - Can the Carnivore community fall into the vegan community nutrient deficiency trap?


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