Concerns: Hair damage & breakage
Bleach, heat and chemical damage, and what treatments can and cannot rebuild in the hair fibre.
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D Weak or undercut by formula
Do bond builders really rebuild broken bonds? Olaplex, K18, L’Oréal and OGX, read against the chemistry
Bleach turns the hair’s disulfide bonds into cysteic acid. Brands now promise to rebuild them in three minutes. We read four bond treatments against…