Vitamin C FAQ
Can vitamin C boost energy?
It may. Research by the National Institutes of Health found that low levels of vitamin C correlated with fatigue.
Do other nutrients increase or block its absorption?
There is no real scientific evidence either way, but vitamin C in general is easily absorbed. However, says Levy, most people suffer from lack of magnesium and too much calcium, which increases oxidation and works against the antioxidant action of vitamin C. To solve the problem, he recommends taking magnesium supplements, as well as vitamin C, at any time of day, separately or together.
How much is safe to take for a cold?
Unless you have kidney disease, says Levy, there’s no need to be concerned about taking too much. He recommends taking a gram of vitamin C every hour or so, until you feel better. If you get diarrhea, take lower doses, take it less often, or take a liposomal form. Anyone with kidney disease should consult a knowledgeable practitioner before taking supplements.
How much vitamin C can you get from food?
It’s estimated that five daily servings of fruits and vegetables provide 200–250 mg.