the animal based nutritional research foundation is doing wonderful research https://donorbox.org/give-today-transform-tomorrow-fueling-a-radical-2026-864420 this is @Paul Saladino MD organization and i owe him a lot of gratitude for his original carnivore book that opened my eyes to the ancestral animal based diet we forgot in the modern age. before that i floundered with plant based diets and all the standard teachings of medical school vilifying cholesterol and pushing vitamin supplements.

vitamin D has never been isolated from humans in a form distinct from vitamin D₃ (cholecalciferol). In humans, only vitamin D₃ has been identified This compound is produced in the skin when 7‑dehydrocholesterol is irradiated by UV‑B light. The term "vitamin D₁" was initially used but was later discovered to be an artifact—a mixture of vitamin D₂ and another compound The first pure vitamin D to be isolated and identified was vitamin D₂ (ergocalciferol), but this was from plant/fungal sources (like irradiated yeast), not from humans

100 YEARS OF VITAMIN D: Historical aspects of vitamin D - PMC

Vitamin D has many physiological functions including upregulation of intestinal calcium and phosphate absorption, mobilization of bone resorption, ...

History of the discovery of vitamin D and its active metabolites - PMC

Before the twentieth century, it was not possible to describe the essentials of a diet that could support life, growth and reproduction of higher a...

great sci fi books i've read over the last few years: Delta-V by Daniel Suarez Kill Decision by Daniel Suarez Daemon by Daniel Suarez Freedom TM by Daniel Suarez Nexus by Ramez Naam Silo Series by Hugh Howey Sand Chronicles by Hugh Howey Project Hail Mary, by Andy Weir All Systems Red, by Martha Wells Recursion, by Blake Crouch The Long Way to a Small, Angry Planet, by Becky Chamber Red Rising, by Pierce Brown Exhalation, by Ted Chiang We Are Legion, by Dennis E. Taylor Children of Time, by Adrian Tchaikovsky