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Guanidine Carbonate Relaxers
Q: Approximately a year and a half ago I relaxed my hair with {brand name omitted} Relaxer. [I'm not African-American, I'm
Caucasian, but I have very thick, very curly dark brown hair.] It contains guanidine carbonate. I now want to chemically
straighten my hair with {brand name omitted} straightener, but it says not to use it if you've used relaxers containing guanidine
carbonate. Has it been long enough that I can worry-free straighten my hair with the straightener and not get fried, dried-out hair? What is the "cut-off" for whether or not it's been long enough? If not, what can I do? Any advice would be greatly appreciated!
A: Okay… You CANNOT use thio-based straighteners on hair that has been treated with guanidine carbonate or hydroxide relaxers. Since
it has been a year and a half ago, if you have been having your hair regularly cut and your hair is less than 8 inches long, you are
probably safe. The problem you will face if you have any portion of the hair that has been treated with the guanidine carbonate
relaxer is that portion of the hair will be badly burned by the application of thio-straightener. The hair that has been grown
since the application of the relaxer should respond as expected.
So you have to ask yourself about the status of your hair. If you have not had your hair cut
since the relaxer application, then the lower portions of your hair are susceptible to damage from using a thio-straightener. You
can opt to cut the affected ends off, and use the thio-straightener, or simply repeat the use of the relaxer product used before.
The only other option would be to use a flat-iron to straighten the hair daily.
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