ScienceInsights

Centrum has some NSF certified products, but not all. Here's what's actually tested, which certifications they lack, and how to check for yourself.

BV happens when vaginal bacteria fall out of balance. Learn what triggers this shift, who's at higher risk, and how to help prevent it.

Nail fungus is usually harmless, but for some people it can lead to serious complications. Here's when it's worth treating.

Toenail color changes can signal anything from a minor injury to a fungal infection. Here's what different colors usually mean and when to see a doctor.

Celery seeds add bold flavor to rubs, teas, and everyday dishes. Learn how to use them, their nutrients, and a few safety notes to keep in mind.

Learn how thyroid, lung, vocal cord, and other nodules are treated — and why many don't need treatment at all.

Feeling too high? Black pepper, CBD, and a few grounding techniques may help ease the experience sooner than waiting it out.

Find out which foods actually help depending on whether you have a cold, nausea, sore throat, or stomach bug — and what to avoid until you feel better.

Sildenafil works by blocking an enzyme that restricts blood flow. Here's what that means for how and when it works, dosing, and key safety considerations.

Tomatoes are healthy for most people, but those with acid reflux, kidney disease, or histamine sensitivity may benefit from cutting back.