Grow it - from strength to length. With Copper + Zinc + Spirulina + Biotin Grow It is a premium blend of vitamins and minerals formulated to promote healthy hair growth. One bottle contains a month’s supply (60 capsules) to keep your hair growing from strength to length, all month long. The one off. Get your hands on one months supply of Grow It. That’s 60 capsules - our recommended daily dose is 2 capsules per day. Get growing with Grow It, the perfect foundation to encourage stronger, longer, thicker hair.