When patients notice thick, brittle, or discolored nails, many assume the culprit is a fungal infection. But not all nail changes are caused by fungus—and not all supplements claiming to fix nails actually work.

At Tareen Dermatology, we believe in science over sales pitches. Let’s break down the most common nail conditions and whether vitamins or natural remedies actually help.

1. Brittle Nails: A Common but Complex Problem

Brittle nail syndrome is when nails become ridged, thin, or easily breakable. It’s especially common in older women, though the exact cause is unclear.

Many people turn to biotin for help, but studies show only limited benefit. More importantly, biotin can interfere with blood tests—especially thyroid, pregnancy, and heart labs. For most, the risks outweigh the minimal improvement.

Bottom line: Skip the biotin unless your dermatologist recommends it—and always tell your doctor if you’re taking it.

2. Yellow Nail Syndrome: More Than Just a Cosmetic Issue

Yellow, thickened nails accompanied by swelling in the fingers and respiratory issues may signal a rare condition called yellow nail syndrome.

Though not well-studied, small trials show oral and topical vitamin E can improve nail appearance. It’s a low-risk option for most people, but not safe if you’re on blood thinners.

Bottom line: Talk to your provider before trying vitamin E, especially if you’re taking anticoagulants.

3. Fungal Nails (Onychomycosis): Is There a Natural Cure?

Yes, fungal nail infections are real—and they’re tricky to treat. Prescription medications can be costly or come with side effects.

One small but promising study showed that a natural oil blend (vitamin E, lime, oregano, and tea tree oil) used daily for six months led to a 78.5% cure rate in toenail fungus.

Bottom line: Ask your dermatologist if a topical essential oil regimen is right for you—especially if you’re looking to avoid systemic meds.

So, Do Nail Supplements Work?

In short—most don’t. Nail abnormalities are complex and often reflect underlying health conditions. That’s why it’s so important to get a proper diagnosis before trying over-the-counter supplements or oils.

At Tareen Dermatology, our board-certified dermatologists can identify the real cause of your nail changes and guide you toward safe, evidence-based treatments.

Need expert help for your nails?

Schedule A Medical Visit