N-Acetylcysteine or NAC is an ingredient that can help with an itchy scalp, It also aids the regrowth of hair in dry, rough patches of skin. In the body, NAC is needed to make the antioxidant glutathione and helps regulate the glutamate (also known as the amino acid glutamic acid). Because glutamate can also act as a neurotransmitter (a chemical signal to the brain), several studies have shown that NAC can be used to treat hair loss caused by compulsive disorders like trichotillomania.


United States


Hair growth




Regulates Glutamate

There are over 11,300 studies on N-Acetylcysteine and we’re always looking for more.

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N-acetylcysteine in the treatment of trichotillomania. NCBI View
N-acetylcysteine, a glutamate modulator, in the treatment of trichotillomania: a double-blind, placebo-controlled study. Jama Network View
N-Acetylcysteine Combined With Dexamethasone Treatment Improves Sudden Sensorineural Hearing Loss and Attenuates Hair Cell Death Caused by ROS Stress. NCBI View