I think it is true but it many people use more alcohol
Other. Chiropractors are physicians, all physicians are in health care and considered doctors, but not MDs. Vets are no DVMs, and podiatrists are DPMs.
The chemicals used only last for a short time, usually about 6 months, although this varies from person to person. So colour or curl will 'fall' out after a while.
Even if the process was permanent, your hair continues to grow, so the colour or curl will not be in the hair coming out of your scalp.
The term, 'permanent' was invented because this treatment lasts a lot longer than a rinse or hair curlers.
