Explore Haircare coverage from Nenna Beauty: Haircare with skincare's rigor: ingredients, hair type and porosity, techniques from named stylists.
Seasonal hair shedding is a documented biological pattern, not an old wives' tale. In a six-year study of 823 healthy women published in the journal Dermatology, researchers led by Dr. Michael Kunz at University Hospital of Zurich found annual periodicity in hair growth and shedding, with the…
The curly girl method is a haircare approach built on three rules: wash less often, cleanse with sulfate-free shampoo or conditioner-only washing, and skip silicones, waxes, and mineral oil that require harsh cleansing to remove. Board-certified dermatologists at the American Academy of…
Bond-building treatments are formulas designed to reconnect disulfide bonds that bleaching, perming, and straightening break inside the hair shaft. In a 2024 study in the International Journal of Cosmetic Science, 1,4-n-butylene dimaleate reconnected free thiol groups and significantly improved…
Hair tools need a cleaning schedule: a UK study in the Journal of Applied Microbiology found roughly 79 to 90 percent of used cosmetic products contaminated with bacteria, beauty blenders averaging over one million colony-forming units per milliliter. The same hygiene logic covers brushes,…
Protective styles protect the hair's ends, but tension at installation can damage the follicle itself: a review in Clinical, Cosmetic and Investigational Dermatology reports traction alopecia affects one-third of women of African descent who wear traumatic hairstyling for prolonged periods.…
Permanent hair dye chemically restructures the hair fiber, and a 2024 study published in Heliyon quantified the cost: even a single dyeing session inflicted noticeable harm, while damage escalated significantly after three or more consecutive treatments. Using atomic force microscopy and tensile…