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A lye relaxer consists of sodium hydroxide (also known as NaOH or lye) mixed with water, petroleum jelly, mineral oil, and emulsifiers to create a creamy consistency. On application, the caustic "lye cream" permeates the protein structure of the hair and weakens its internal bonds, causing the natural curls to loosen out as the entire fiber ...
"When sodium or calcium hydroxide relaxers are applied, they break down the disulfide bonds, these are chemical bonds that hold the hair's protein structure together and contribute to its natural ...
Guanidine exists protonated, as guanidinium, in solution at physiological pH. Guanidinium chloride (also known as guanidine hydrochloride) has chaotropic properties and is used to denature proteins. Guanidinium chloride is known to denature proteins with a linear relationship between concentration and free energy of unfolding.
Relaxers/chemical straightening - Chemical relaxers break hair’s disulfide bonds. Lye relaxers contain sodium hydroxide, while non-lye relaxers contain calcium hydroxide and can be used on more sensitive scalps.
Hair relaxers have seen a considerable resurgence in popularity among the Black hair community. Here is why some women are deciding to go back to relaxers after years of dealing with their natural ...
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Chemical relaxers increased in demand throughout the 1800s and 1900s. These relaxers often contained sodium hydroxide ( lye ) or guanidine hydroxide which result in hair breakage, thinning of the hair, slowing of hair growth, scalp damage and even hair loss, according to Gheni Platenburg in the article, "Black Women Returning to Their Natural ...
This dosage may be gradually increased to a total daily dosage of 35 mg/kg (16 mg/pound) of body weight per day or up to the development of side effects. Side effects may include increased peristalsis, diarrhea, paresthesia (tingling and numbness), and nausea. Fatal bone-marrow suppression, apparently dose related, can occur with guanidine. [7]