Full Rescue Invigorating Serum is a salon-grade, micro-dosed fortifying serum formulated to strengthen hair from root to tip and to balance the scalp for healthier-looking growth. Powered by a concentrate of niacinamide and steam-distilled rosemary leaf oil, the serum fortifies fragile strands (contributing to reduced breakage when used as a system) while calming and rebalancing the scalp—making it a targeted professional step for thinning, falling or breakage-prone hair.