Hair may appear healthy on the outside, but inside… it's fragile, lacking strength and density. Lowell Pro Performance Acidifying Repair Protein was created to restore what time and chemical treatments have taken away — vitality, resistance, and body. Upon application, you feel your hair gaining structure, as if each fiber is slowly being rebuilt from the inside.

Developed with Biomolecular Structure Technology, this formula intelligently targets the most damaged areas of the hair strand, filling gaps and rebuilding the hair fiber without weighing it down. The result is immediate: stronger, more compact hair with a natural shine.

Its acidifying action regulates the hair's pH, sealing the cuticles and preventing nutrient loss. Meanwhile, the Amino Pro Fill complex penetrates deeply into weakened areas, replenishing hair mass and restoring the internal cohesion of the fiber. With concentrated amino acids and proteins, the hair recovers its elasticity and the silky feel characteristic of healthy hair.

Ideal as a pre-chemical treatment to prepare hair before aggressive processes, or as a post-chemical repair treatment, this multifunctional protein is the essential second step in a professional reconstruction routine. With each use, the difference becomes visible — less breakage, more resistance, more life.

Key features:
Deeply reconstructs and restores resistance to the hair fiber;
Fills porosity, making strands more uniform;
Selectively repairs damage caused by chemical processes;
Restores pH balance and seals cuticles;
Reinforces the internal structure with amino acids and proteins;
Reduces hair breakage and preserves hair health.