Question

d. Natural source of Vitamin D​

Answer 1

SUN is the natural source for vitamin D

from foods:-

Few foods naturally contain vitamin D. The flesh of fatty fish (such as trout, salmon, tuna, and mackerel) and fish liver oils are among the best sources .An animal’s diet affects the amount of vitamin D in its tissues. Beef liver, cheese, and egg yolks have small amounts of vitamin D, primarily in the form of vitamin D3 and its metabolite 25(OH)D3. Mushrooms provide variable amounts of vitamin D2 .Some mushrooms available on the market have been treated with UV light to increase their levels of vitamin D2. In addition, the Food and Drug Administration (FDA) has approved UV-treated mushroom powder as a food additive for use as a source of vitamin D2 in food products. Very limited evidence suggests no substantial differences in the bioavailability of vitamin D from various foods