What is vitamin D cholecalciferol?

Vitamin D is a fat-soluble vitamin, often referred to as the “sunshine vitamin”. Vitamin D is important for good overall health and strong and healthy bones, It’s also an important factor in making sure your muscles, heart, lungs and brain work well and that your body can fight infection.
Your body can make its own vitamin D from sunlight. You can also get vitamin D from supplements and a very small amount comes from a few foods you eat.

Functions

Vitamin D is produced when your skin is exposed to sunshine. The amount of vitamin D that your skin makes depends on such factors as the season (i.e., there’s usually less sunshine in winter months), the time of day (the sun’s rays are most powerful between 10 am and 3 pm), the amount of cloud cover and air pollution, and where you live (cities near the equator have higher UV levels). It’s the UV (ultraviolet) light in sunlight that causes your skin to make vitamin D.

Rich Foods

1) sunlight Promotes vitamin D synthesis from cholesterol in the skin.
2) Cod liver oil 1 tsp: 440 IU (over 100% DV)
3) Sardines (fish) 3 ounces: 164 IU (41% DV)
4) Salmon (fish) 3 ounces: 400 IU (100% DV)
5) Mackerel (fish) 3 ounces: 400 IU (100% DV)
6) Tuna (fish) 3 ounces: 228 IU (57% DV)
7) Raw Milk 1 cup: 98 IU (24% DV)
8) Caviar 1 oz: 33 IU (8% DV)
9) Eggs 1 large: 41 IU (10% DV)
10) Mushrooms 1 cup: 2 IU (1% DV)
etc..