6, N. O. (2020, May 13). Vitamins for stronger hair: 8 big benefits of using hair vitamins. News 9. Retrieved August 1, 2022, from https://www.news9.com/story/5e8cf9d4fa8ed3749a62c867/vitamins-for-stronger-hair:-8-big-benefits-of-using-hair-vitamins#:~:text=Helps%20Hair%20Grow%20Faster&text=Vitamin%20A%20is%20responsible%20for,fair%20share%20of%20vitamin%20A.
Eldridge, L. (2022, February 22). What exactly are free radicals and why are they important? Verywell Health. Retrieved August 1, 2022, from https://www.verywellhealth.com/information-about-free-radicals-2249103
Hair loss in women: Causes, treatment & prevention. Cleveland Clinic. (n.d.). Retrieved August 1, 2022, from https://my.clevelandclinic.org/health/diseases/16921-hair-loss-in-women#:~:text=However%2C%20it%20is%20estimated%20that,women%20in%20the%20United%20States.
Scaccia, A. (2017, July 28). Vitamin D deficiency and hair loss: What's the connection? Healthline. Retrieved August 1, 2022, from https://www.healthline.com/health/vitamin-d-deficiency-hair-loss#outlook