4 citations,
February 2017 in “Journal of Cutaneous Medicine and Surgery” Compounds from certain trees used by First Nations people show potential for treating skin conditions and promoting hair growth, but more research is needed to confirm their safety and effectiveness.
January 1993 in “Side effects of drugs annual” Natural products like propolis are causing more skin allergies, and certain skin treatments and medications have various side effects and risks.
17 citations,
October 2003 in “Contact dermatitis” Glycerin in hand cream can cause allergic skin reactions.
16 citations,
December 2016 in “Skin appendage disorders” Nickel, cobalt, balsam of Peru, fragrance mix, carba mix, and propylene glycol are common allergens causing scalp contact dermatitis.
20 citations,
July 1988 in “Clinics in dermatology” Thioglycolate lotions are the most popular method for permanent waving and hair straightening.