How does our body acquire vitamin D from sunlight?

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Vitamin D is primarily acquired through skin exposure to sunlight, specifically UVB rays, which initiate a chemical reaction converting 7-dehydrocholesterol in the skin to previtamin D3. This is then transformed into vitamin D3 (cholecalciferol) and subsequently converted in the liver and kidneys to its active form, calcitriol. For deeper understanding, it's recommended to research "vitamin D synthesis" for comprehensive explanations. Engaging in discussions with specific questions based on prior research can lead to more productive exchanges.
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Can anyone explain how we acquire vitamin D or which chemical reaction takes place ?
 
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Can I ask how much you've looked into this yourself? Just typing into google "vitamin D synthesis" provides many in depth explanations. Generally it's best not to ask cold questions here. If you've done this and there's something specific you don't understand or would like some clarity on that's fine, just ask about that specifically.
 

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