for something so important to the body, why does our bodily unable to produce its own vitamins?

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for something so important to the body, why does our bodily unable to produce its own vitamins?

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Anonymous 0 Comments

Produce them from *what?*

Let’s imagine we had an enzyme that could produce, say, Vitamin A. Well, that enzyme has to produce Vitamin A *from some precursor*, because our bodies cannot just conjure the required atoms into existence. And that just moves the problem back one step – now we have to consume that precursor, so that precursor is now an essential vitamin.

Ultimately no form of life makes *everything* it needs to live – at some level *everything* has to get *something* from the environment around it, because the law of conservation of mass implies that everything we make has to be made of something else that already existed.

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