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Vitamine D

Constituents

Vitamine D2 = ergocalciferol

Vitamine D1 = cholecalciferol

Provenience

main: - animal: fish, milk, eggs, cheese, sausages irradiated by UV rays (sun) produce vitamin D3 limited: - vegetal: skin of mushrooms irradiated by UV rays (sun) produces vitamin D2

Action

The liver, and especially the kidney transform these vitamins into dihydroxyergocalciferol or dihydroxycholecalciferol

dihydroxycholecalciferol

These polyols are the true active ingredients that - ensure the absorption of calcium in the blood - incorporate calcium into the bones

Estimated average needs

adult: 5.0 μg / d child / adolescent: 12.5 μg / d pregnant woman: 20 μg / d breastfeeding woman: 20 μg / d

Deficiency

- rickets - softening of bones - tetanus crises