A natural, herbal hair oil such as Zen Maitri’s Hair Oil — combining therapeutic oils, essential oils and herbs — can help strengthen the hair, boost blood flow to the scalp, promote hair growth and enhance volume. It can be especially useful for those struggling with hair loss or dry, damaged hair as a result of colour treatments or straightening. Hair oil can also help to nourish and moisturise your hair, and it can help with frizzy hair.