How it works: The active ingredient is Guanidine Hydroxide, a mix of calcium hydroxide cream and guanidine carbonate, or ammonium thioglycolate. These are called no-lye, but they are still lye. These chemicals, like sodium hydroxide, break down the hydrogen and sulfide bonds that give the hair its shape rearranging the hair bonds.
A no-lye relaxer is an option for people whose scalps are sensitive or who use a permanent coloring agent, although it is not recommended by many experts. This formulation is best on hair that just needs its curl loosened a bit.
Pros: It allows you to color and relax your hair, but never do both at the same time. Space these processes at least two weeks apart, or be sure to consult a trained cosmetologist before coloring your hair after a relaxer. Only a well-trained and experienced professional can handle the dual processes well, and only women with well-conditioned and coarse hair should opt for both.
Cons: This type of relaxer deposits additional calcium on the hair, making it more prone to dryness and breakage. A consistent moisturizer regimen is a must with relaxed hair be it with no-lye or lye based relaxers. No-lye relaxers will not completely straighten super-tight hair, which leaves the shaft more porous and susceptible to damage. For this reason, many experts do not use this product. Like lye relaxers, no-lye relaxers can cause severe scalp and hair damage. This information does not mean that you should absolutely not apply No-lye Relaxer. It’s still can be used if applied incorrectly. Always seek for professional services.