Hydrasource Daily Leave-In Tonic is a lightweight, no-rinse mist for dry hair, built around fermented aloe vera and hyaluronic acid to add moisture without weighing hair down. Unlike a heavier leave-in cream, it's designed to be misted on and combed through rather than applied as a dense product.

It's meant to follow Hydrasource Shampoo and Conditioning Balm as the final step in that system, and it's formulated to be safe on color-treated hair. Biolage's current formula is vegan and paraben-free.

This is a good option for anyone with dry hair looking for daily hydration and easier detangling without extra weight or buildup.

Aqua/Water, Cetearyl Alcohol, Polysorbate 20, Behentrimonium Chloride, Parfum/Fragrance, Orbignya Oleifera Seed Oil, Cetyl Esters, Amodimethicone, Sodium Benzoate, Isopropyl Alcohol, Citric Acid, Limonene, Tocopherol, Trideceth-6, Chlorhexidine Dihydrochloride, Hexyl Cinnamal, Coumarin, Sodium Hyaluronate, Xylose, Panthenol, Ethylhexyl Salicylate, Aloe Barbadensis Leaf Juice, Cetrimonium Chloride.

This is the current official formula — note it differs from older ingredient lists circulating online, which listed parabens and a UV filter no longer present.