The hair vitamins, minerals and plants extracts for maximum hair growth are....
Vitamin B7 or Biotin: renews cells and attaches to fatty acids, preventing them from attacking the hair follicles
Vitamin B6: binds to testosterone receptors and helps block their effect on hair
Magnesium: blocks inflammatory markers associated with hair loss
Zinc: helps produce sebum, the scalp’s natural conditioning oil
Pumpkin Seeds: contain oils that block testosterone, plus vitamins and minerals that aid in hair growth and health
Nettle Root: blocks DHT and romatase, both of which are associated with alopecia
Saw Palmetto: blocks 5-alpha-reductase enzyme from producing DHT
Gotu Kola: shown to add length and density to hair
Lavender Oil: used externally on the scalp with other essential oils and shown in laboratory tests to increase hair growth up to 44%
Hairfinity is one of the best multivitamins I've encountered.
Most of these natural supplements have benefits far beyond what they do for hair growth, such as skin, nails and even mental health.