Others have curls and iron them out. 4 Medical Treatments. You also need vitamin A, biotin, zinc, protein, and omega 3 fatty acids for healthy hair. These chemicals can cause permanent damage to the hair follicle, which could result in hair that is forever changed. Some of the most commonly used drugs in Britain and North America have thinning effects on hair. Most hair does not change drastically, although it has been known to happen. The reason that some meds may cause us to lose our hair is that they are toxic to hair follicles – the cells responsible for hair growth, says Dr. Sharon Orrange, a Clinical Associate Professor of Medicine at the University of Southern California, who listed a number of the drugs commonly associated with hair loss as a potential side effect. My … Not good! Certain cancer drugs that inhibit these receptors may cause a patient to develop curly hair as a side effect. Hormones, drugs and vitamins, and chemical treatments can change the shape of the follicle, which means that your hair could change many times over the course of your life. How Chemo Affects Hair Regrowth . But for a few people, their hair … Is keratin good for curly hair? Hair loss is a frequently caused side effect of drugs but hair color is another adverse effect that is rare but bothersome. Your hair, skin, and fingernails will take some time to recover as the toxins leave your body. My appendectomy caused my hair texture to change dramatically, but other medical treatments can cause changes in hair texture as well. My hair didn't get curly until I hit puberty. The reason for this is still unknown, but some researchers have speculated that it has to do with how metals are processed in the body. I have systemic lupus (and fibromyalgia, hypothyroid, etc, etc, etc) and take *alot* of medication. But its not just hair thinning – drugs can really cause problems with the way hair treatments like colours, extensions and waves ‘take’.” Kaye Briden, owner of Yazu Hair Lounge in New Zealand, has over 30 years experience in the industry. So, Will Your Hair Change Shape? Medications for seizures and bipolar disorder, on rare occasions, can cause curly hair. However, the drug can also have a curious and harmless side-effect - making straight hair grow curly. Keratin treatments are appealing because they make hair more manageable and easy to style, plus they can last up to 3-5 months. A Hair Mystery: Curly Hair Gone Straight Some people have straight hair and want curly hair. Black or brown hair changing to blond, greying or reddening of hair, and darkening of originally grey hair have been reported in many cases. Although hair is a much studied topic some aspects still remain a mystery, including why straight hair suddenly becomes curly or vice versa. Have a burning science question you’d like … Many people with curly hair choose to use keratin treatments to relax their hair and give it a different texture. Chemotherapy often results in hair texture changes, especially when all of the hair is lost. The chemotherapy drugs that cause hair loss affect the roots of your hair and continue to affect the formation of the hair shaft because the drugs remain in your system for some time after treatment. However, I've never had any major changes in my hair caused from medication, pregnancy, etc. Ugh.