TLDR High temperatures, acidic conditions, and too much coconut oil damage hair, while a pH of 5 to 7 keeps it healthy.
The study investigated the effects of extreme temperature, pH, and moisture on human hair, using samples from a female student. Hair exposed to high temperature (100°C), acidic conditions (pH 3), and excessive virgin coconut oil showed damage, while a pH range of 5 to 7 was ideal for maintaining hair health. Healthy hair was characterized by smoothness, consistent color, and shine. Observations were made twice daily over five days, and results suggested that these findings could help cosmetic companies develop better hair care products.
4 citations,
June 2019 in “International Journal of Cosmetic Science” Heat transfer in hair is slower in groups of hair, increasing the risk of damage from high-temperature styling tools.
37 citations,
October 2015 in “PeerJ” Perming significantly changes hair's molecular structure, while shampoo and conditioner do not.
51 citations,
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47 citations,
November 2007 in “The journal of investigative dermatology. Symposium proceedings/The Journal of investigative dermatology symposium proceedings” Healthy hair is shiny, smooth, and has clean ends.
January 2020 in “Journal of Pharmacognosy and Phytochemistry” The VCO-based herbal hair tonic is effective, safe for hair loss treatment, and can be mass-produced.
January 2024 in “Uttar Pradesh journal of zoology” Chemical treatments severely damage hair cuticles, especially in previously treated hair.
August 2024 in “Cosmetics” K18® and Olaplex® both effectively repair bleached hair, improving its strength, smoothness, and overall health.
May 2023 in “Jurnal farmasi sains dan praktis” The hair tonic with cinnamon oil and coconut oil was stable and caused very mild irritation.
February 2024 in “Journal of applied pharmaceutical research” Herbal hair oils with Coconut, Curry leaves, Amla, Fenugreek, and Onion promote hair growth and are safe.
