Like HowStuffWorks on Facebook!

Vitamin & Supplement Facts

Vitamin and supplement facts can help you determine whether you need to complement your diet. Read up on the facts before you head to the store.

Top 10 Supplements for Hot, Humid Climates

When the temperature is high and the humidity makes it feel even hotter, your body has to work harder. Do you know which supplements can help?

You Might Need Half as Much Vitamin D as Previously Thought

A reanalysis of a previous study changes the RDA for vitamin D. HowStuffWorks explains why. See more »

How Dietary Supplements Work

There's a lot of information (and misinformation) out there about dietary supplements. Learn the facts about them in this article at HowStuffWorks. See more »

Everything You've Read About Vitamin D Is Wrong

Your doctor may have told you to start taking vitamin D. HowStuffWorks tries to make sense of the conflicting science on this supplement. See more »

Can vitamin C help prevent dengue fever?

Some people swear by vitamin C to prevent colds. But is vitamin C powerful enough to prevent dengue fever? Find out. See more »

10 Supplements That Do Not Work as Advertised

Some supplements are touted as miracle cures, and while they may have benefits, they don't live up to the hype. Find out about 10 such supplements. See more »

Best Herbal Supplements

Curious about which herbal supplements are best suited for your needs? Learn about the best herbal supplements and common uses. See more »

Electrolyte Supplements Explained

Electrolyte supplements on the market are targeted to athletes needing to rejuvenate. Find out if you could benefit from electrolyte supplements. See more »

Daily Recommendations for Vitamins, Minerals and Supplements

Vitamins, minerals and supplements are beneficial to your health with the right dosage. See daily recommendations for vitamins, minerals and supplements. See more »

What vitamins stop you from being cold all the time?

If you are cold all the time, the culprit could be a vitamin deficiency. See what vitamins can stop you from being cold all the time. See more »

What vitamins help keep you alert?

Some vitamins can help you stay alert and are a better alternative to unhealthy snacks. Learn what vitamins help keep your alert. See more »