how do vitamin tablets work?

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For example you can get vitamin D from the sun, so how can it be put in a small tablet?

In: Chemistry

You don’t get vitamin D from sunlight. Sunlight hitting your skin causes a chemical reaction that creates Vitamin D out of other things your body already has.

But our bodies are not our only sources of Vitamin D, or any vitamin. Our food gives us a vast majority of the vitamins and minerals we need, including Vitamin D. Vitamin D is high in some fatty fish, Eggs, Cheese, and Beef Livers.

So any of these could be used as sources of the Vitamin D to make it into pill form. However, I think normally it’s artificially created nowadays. I’m not 100% sure though on that part.

its also in food and can be created synthetically

“Vitamin D isn’t naturally found in many foods, but you can get it from fortified milk, fortified cereal, and fatty fish such as salmon, mackerel and sardines. Your body also makes vitamin D when direct sunlight converts a chemical in your skin into an active form of the vitamin (calciferol).”