A newsletter on ketogenic and carnivore diets, covering ketone physiology, vitamin A toxicity and experimental interventions, with citations to the scientific literature. Issues range from in-depth argument on a single question to brief notes on substances the author has tried.

Michael Easter, author of The Comfort Crisis, publishes three posts a week on health, fitness, nutrition, mindset and performance, mixing podcast interviews, personal essays and a monthly roundup of studies and ideas. A reader gets practical takeaways and stories about resilience, longevity and living better.

A newsletter from a former New York Times journalist and health coach covering strength training, nutrition and longevity, with video demonstrations, quick whole-food recipes and occasional audio essays. It mixes critical commentary on health media and longevity hype with practical training and cooking guidance.

A London-based newsletter that turns human nutrition research into practical food advice for everyday problems like winter immunity, evening cortisol and afternoon tiredness. Each issue checks popular food claims against actual trial evidence, though some sections are behind a subscription paywall.