If you take multiple vitamins and supplements, it can be challenging to know how to time each dosage. Here's the best time to take them and why it matters. 

You might want to take vitamins and supplements at certain times of the day based on their effects, says Dimitar Marinov, MD, an assistant professor at the Medical University of Varna, Bulgaria.

For example:

Important: While the time of day doesn't change how effectively your body absorbs supplements, whether or not you take them with a meal does. Some vitamins, like B and C, are best to take on an empty stomach while others, like vitamins A and K, need to be taken with foods containing fats for proper absorption.

You should take water-soluble vitamins and minerals on an empty stomach as your body will more easily absorb and metabolize them, says Alana Kessler, a registered dietitian and nutrition consultant based in New York City. 

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