Botulinum toxin type A injections into the forehead have never been reported to cause any side effects on the hair. Most stylists recommend using these treatments no more than three or four times a year, as excessive use may lead to breakage, thinning and dullness of the hair.
Botoxis injected directly into the muscle, far below the skin follicles, and therefore it won't make the hair fall out. If you are experiencing hair loss, a board-certified dermatologist can help you determine the cause and offer solutions such as minoxidil. In addition, studies have shown that patients with androgenic alopecia (AGA) who received Botox injections experienced a moderate to marked reduction in hair loss compared to before treatment.
Some products marketed as Botox for hair include Fiberceutic from L'Oreal Professionel. It is believed that Botox can relax the muscles around the head, increase blood flow and oxygen concentration in the area of alopecia, and further inhibit DHT activation, ultimately leading to a reduction in hair loss. Botox is just one of many treatments available to people who want to improve the appearance of their hair. Injection site events (pain, erythema, or oedema) developed in 2 patients and 1 patient in the BTA and BTA+FNS group, respectively. Botox for hair is a cosmetic treatment that is designed to improve the strength and appearance of the hair.
Botox injections into the scalp have been shown to relax the scalp muscles, improve blood flow, and increase the delivery of nutrients to the hair, thereby increasing hair density. Excluding hair count, other trichoscopic parameters such as dermatoscopic images, hair diameter and proportion of miniaturized hairs can be used to monitor the effectiveness of treatment in subsequent studies. Often, if a person practices self-care techniques at home they may see improvements in their hair. Patients were excluded if they had serious diseases of the internal organs, eyes or skin; diseases of the neuromuscular system; inflammation, infection or unhealed wounds on the skin around the injection site on the head; systematic treatment with corticosteroids or other immunosuppressants and immunomodulators in patients last 3 months; and phobia of BTA treatment. It seems that Botox injections are only effective if the hair follicle is not completely destroyed and still has some evidence of “life” in it. Ultimately, a cycle of injections given two or three times a year is said to reduce scalp tension through increased blood circulation which helps improve the level of nutrients in the tissue surrounding the hair follicles, reactivating hair growth. In my more than 30 years of practice, I have never heard of any patient complaining of hair loss after Botox.
There are some claims about the benefits of a fish protein called AminoMar C for maintaining hair health and preventing thinning hair. However, injections are only effective if the hair follicles are alive and can make hair grow.