Skin, Hair & Nails

This section covers skin, hair and nails. It is split into Skincare and Anti-Aging, Hair Growth, and Nail and Toenail Fungus.

We check collagen type and dose, biotin levels, active skincare ingredients and antifungal claims against published research. Side effects and refund terms are part of every review.

High dose biotin can affect some lab tests, so tell your doctor if you take it. Ask before use if you are pregnant or take medication.

Do hair, skin, and nail supplements work if you are not deficient?

For most people who eat a varied diet, there is little evidence that biotin or collagen supplements improve hair, skin, or nails. A true deficiency is uncommon. High dose biotin can also interfere with some lab tests, so tell your doctor before blood work. Changes in hair or nails can signal other health problems worth checking.

Source: Dietary Supplements, MedlinePlus