Strengthen and protect thinning, damage-prone hair with Nutrafol Strand Defender Conditioner, a lightweight, physician-formulated conditioner clinically tested to replenish moisture and improve elasticity. Its silicone-free formula provides multi-layer protection against damage while helping hair stay strong, smooth, hydrated and healthy-looking without weighing it down. Designed for all hair types and ethnicities, this nourishing conditioner is also tested safe for color-treated hair and extensions, making it an easy addition to routines for fine, thinning, brittle or frequently styled hair. Key Benefits Defends Against Damage: Provides multi-layer protection to help defend vulnerable hair strands against damage. Helps Reduce Breakage: Strengthens thinning hair to help protect against the breakage that can contribute to a less full appearance. Replenishes Moisture: Hydrating natural ingredients nourish dry, damage-prone hair without leaving behind a heavy or greasy film. Improves Hair Elasticity: Clinically tested to replenish elasticity and moisture for stronger, healthier-looking strands. Strengthens Thinning Hair: Helps hair stay strong, smooth and healthy while supporting overall hair health. Lightweight & Silicone-Free: Provides intensive moisturization and protection without relying on silicones to conceal existing damage. Color & Extension Safe: Tested safe for color-treated hair and suitable for extensions. Fast-Acting Conditioning: Hair can feel more moisturized, smoother and easier to manage after just one use.