"For now, there isn’t enough research to definitively state that biotin can help grow hair.
But biotin has been shown to help with preventing balding and hair loss.
In fact, biotin is primarily used for alopecia — a condition that causes hair loss in all sexes. “Biotin helps maintain hair growth and helps with inflammation,” Dr. Bergfeld says. “The hair follicle, the skin and the nails all benefit.”"
https://health.clevelandclinic.org/is-biotin-as-good-as-advertised-for-your-hair-loss/
"“Vitamins are essential for healthy hair growth and may help in preventing hair shedding and thinning,” says Michele Green, M.D., a cosmetic dermatologist in New York. “The best vitamins for hair growth include B vitamins, vitamin D, vitamin E, zinc, biotin and iron."
https://www.forbes.com/health/body/best-vitamins-and-supplements-for-hair-growth/
"While factors such as age, genetics, hormones, and medication may affect your hair, nutrition is key for hair health throughout life. In particular, the vitamins B, C, and D plus iron and zinc play important roles.
Some supplements are formulated with these nutrients to support hair growth, strength, and thickness. But sometimes a multivitamin or a nutrient-specific supplement will do."
https://www.healthline.com/nutrition/best-vitamins-hair-growth#_noHeaderPrefixedContent
"Vitamins are the building blocks for a healthy body and play a pivotal role in maintaining healthy hair."
https://www.msn.com/en-us/health/nutrition/the-role-of-vitamins-in-hair-care/ar-AA1iWXDE