Polyphenol–Inorganic Sulfate Complex-Enriched Straightening Shampoo for Reinforcing and Restoring Reduced Hair Integrity

The study introduces a novel hair-straightening shampoo enriched with a polyphenol–inorganic sulfate (PIS) complex, which effectively straightens hair while maintaining its integrity. The shampoo uses sodium sulfate to break disulfide bonds and polyphenols from green tea leaf extract and dopamine hydrochloride to reinforce hair structure, enhancing smoothness and reducing damage. The PIS complex provides additional benefits such as high hydrophobicity for humidity protection, antistatic effects, and reactive oxygen species scavenging, promoting healthier hair. The study confirms that the PIS shampoo offers a promising, less damaging alternative to traditional chemical straightening methods.