Which vitamin is a coenzyme used to build nucleic acids and we can get from eating dark green veggies, as well as from synthesis by bacteria in our colon?

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consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.

it is either c or d and i know for sure it is not a or b