Ingredient glossary
A quick reference for common ingredients you'll see across our nail care and cuticle routines — what they are and why they show up in the products we cover.
Tea Tree Oil
A natural antifungal and antibacterial oil often used in nail-care routines aimed at discoloration and odor.
Related guide →Vitamin C
Supports skin and nail bed health and is commonly paired with tea tree oil in at-home nail routines.
Related guide →Biotin (Vitamin B7)
One of the most studied nutrients for nail strength; deficiency is linked to brittleness, though most people get enough from diet.
Related guide →Keratin
The protein nails are made of. Keratin treatments and polishes claim to reinforce the nail plate temporarily.
Related guide →Jojoba Oil
A lightweight oil similar to natural skin sebum, often used for cuticle and hand hydration.
Related guide →Peppermint Oil
Often added to nail and cuticle oils for its cooling sensation and mild circulation-boosting reputation.
Related guide →Vitamin E
A common moisturizing ingredient in cuticle oils and hand creams that helps lock in hydration.
Related guide →Castor Oil
A thick, fatty-acid-rich oil popular in DIY nail masks for softening cuticles and sealing in moisture.
Related guide →