The latest science behind the 10 most popular, plus answers to that age-old question: Should you take them?

They seem like a safety net for better nutrition. Are they important for everyday health?

The case for a high fiber diet is strong. Will a supplement help you meet your quota?

30 to 50% of Americans are low in vitamin D. Are supplements the answer? It’s complicated.

Kids need calcium for growth. Adults need it for bone health. Who should take it in pill form?

How to know if fish oil is for you

What researchers now know about the classic cold antidote

Probiotics may have many benefits. Whether you can get them in pill form is another story

“Vitamin E is like the Tale of Two Cities”

Protein supplements, powders, and shakes are all the rage. But are they necessary?

The lowdown on thiamin, folate, B6, B12, and more