Keratin is a fibrous protein naturally found in our hair, skin, and nails, giving them structure and resilience. But with age or exposure to environmental pressures, our body produces less keratin ...
Because keratin treatments are great at amping up ... and sodium hydroxide to permanently break the bonds inside the hair structure, so that it can be reset and rebuilt straight.
Meanwhile, Kara Jillian Brown—who has tight, 4B-4C coils—opted for a keratin treatment with formaldehyde (more on this ingredient later). For further insight into this popular hair treatment ...
Kassenbeck, P., in a lecture, Symp. Microscopy of Fibres and Fibrous Materials, organized by the Roy. Micro. Soc. and Textile Institute, Manchester (1964). Johnson, D ...