What it is: An overnight hair serum designed to strengthen your locks. Who it's for: Thin, dull and damaged hair types.What it does: Holi(locks) stimulates and encourages healthier looking hair. When applied topically for at least 12 weeks, Agent Nateur's overnight strengthening serum helps your hair to appear denser, thicker and fuller, all without the use of harsh silicones. How to use: Use 1 to 2 full droppers for whole-head application. Massage into scalp all the way through the ends of your hair. Apply up to 4 times weekly, ideally at bedtime. Gently massage the serum in circular motions for about 15 minutes and leave it in your hair for at least 30 minutes. Best when used overnight. Wash and condition hair after use. Paraben-free; phthalate-free; sulfate-free Natural Beauty & Wellness products are free of sulfates, phthalates, parabens, petrochemicals, mineral oil, silicone and talc Cruelty-free Made in the USA