How long it takes for vitamins and supplements to work depends on factors like the type of vitamin, your diet and hydration, ...

Women who might become pregnant should be especially cautious with vitamin A supplements or avoid them entirely .

For example, 3,000 IU of vitamin A (as retinol) is 900 mcg RAE. About 18,000 IU beta carotene, which is less potent than ...

If I am taking vitamin A, what is a reasonable dose? I have seen reports that taking too much can cause liver damage, but ...

You’ve thought about the best time to take probiotics, so the natural next question is: When is the best time to take vitamins? To a more complicated question, there’s a more complicated answer, but ...

Several medical conditions can affect the need for B12, as well as a vegan diet.

Dosage of Vitamin D Needed To Achieve 35 to 40 ng/ml (90-100 nmol/L) Historically, 400 IU (10 ug) of vitamin D was recommended for better health because it closely approximated the amount of ...

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