40 citations
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February 2002 in “International Journal of Dermatology” Permanent hair dye damages hair but it mostly recovers after 8 weeks; using certain hair care products can help repair it.
November 2024 in “International Journal of Cosmetic Science” Haircare products with a pH between 5 and 7 are best for maintaining healthy hair.
233 citations
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February 2018 in “Polymers” Chitin and chitosan are useful in cosmetics for oral care, haircare, and skincare, including UV protection and strength improvement.
January 2021 in “Lecture notes in mechanical engineering” High temperatures, acidic conditions, and too much coconut oil damage hair, while a pH of 5 to 7 keeps it healthy.
10 citations
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August 2021 in “Cosmetics” The best shampoo formula used 1% high-weight hyaluronic acid, 10% acidic sophorolipid, and 1% salt for effective hair conditioning and cleansing without sulfates or silicones.