Vitamin D
Fat-Soluble Vitamins A, D, E, and K: Why They Behave Differently from B and C
Fat-soluble vitamins A, D, E, and K store in body fat and liver, require dietary fat for absorption, and can build up to toxic levels. Here's the science.
BeginnerHow Calcium Absorption Works: Dairy, Vitamin D, and the Bone Density Evidence
Calcium absorption varies widely by food source. Dairy absorbs at ~30%, broccoli at ~50%, spinach at ~5%. Here's the science behind why.
IntermediateMushroom Nutrition: The Vitamin D Trick and the Umami Mineral Source
Mushrooms make vitamin D2 under UV light and supply ergothioneine, selenium, copper, and B vitamins. Here is what the research shows and how to cook them.
BeginnerSalmon Nutrition: EPA, DHA, and the Farmed vs Wild Question
The health benefits of salmon come down to EPA and DHA. See the full nutrient profile, what the farmed vs wild data shows, and the underrated vitamin D story
BeginnerVitamin D: How Your Body Makes and Uses It
How vitamin D is made from sunlight, processed by the liver and kidneys, and used to regulate calcium, bone health, and immune function in the body.
Beginner