Beside biotin which other vitamins promote growth and healthy hair?

Nutritionist: There are many supplements that promote improved immune system and health. Better health will also help with growth, but varies from person to person

Healthy hair: For healthy hair growth: Get adequate sleep,avoid excess sugar & fat in diet, v carbonated beverages, eat enough protein, exercise regularly. Biotin helps (but don't over do it). Insure you have adequate Iron (like kale & other dark green leafies), Omega 3 fatty acids (like walnuts) & vitamin E (fruits & vegetables). Avoid sulfates & formaldehyde in shampoos). Avoid excessive blow dry heat.