Details: Revive dry hair and scalp with the Biolage Hydra Source Moisture Method Scalp & Hair Serum. This ultra-lightweight, water-based formula is micro-dosed with a potent hydrating concentrate of micro-filtered aloe vera and fermented hyaluronic acid. It absorbs instantly to nourish the scalp and provide long-lasting hydration to your hair strands without feeling greasy or weighed down. Clinically tested to hydrate the scalp for 24 hours in a single use, this serum supports the scalp's moisture barrier, leaving hair looking healthy, shiny, and soft from root to tip. Suitable for color-treated and sensitive scalps, this vegan and silicone-free formula brings professional-level hydration treatment to your home routine.