Lengthen Hair Goal Add In Booster Treatment

As a lightweight add-in serum from Function of Beauty PRO, the Lengthen Booster blends into routines to strengthen strands and boost length retention. Gel-serum texture absorbs quickly without greasiness. Ideal for those seeking longer, healthier hair and compatible with color-treated or sensitive scalps. Fragrance-free and formulated with vegan-friendly claims, it suits daily layering alongside conditioners and oils.