Fat-Soluble Vitamins
Carrot Nutrition: Beta-Carotene, Eye Health, and the Fat Absorption Rule
Carrots are best understood through beta-carotene bioavailability: what you absorb depends on preparation and fat intake.
BeginnerVitamin A and Retinol: How Your Body Uses It and Why Too Much Is Toxic
How vitamin A works in the body, why retinol and beta-carotene aren't equal, what RAE units mean, and why preformed vitamin A turns toxic past the upper limit.
IntermediateVitamin 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