Red meat, fish, and eggs are all good sources of protein, and vegetarians can get theirs through peanut butter, leafy greens like kale and spinach, and beans. So that is 12mm a month. How Do You Grow Hair Long All Your Will Ever Need To There is 10mm in one cm. How long does it take for your hair to grow . Because the process of going from short to long hair can take some getting used to, we recommend using the best hair care products for long hair to soften your locks, boost volume, and minimize frizz. The anagen phase of hair growth, which is the phase where your hair actively grows, can last between two to six years. It completely depends on different factors. Want to grow your hair fast? Your age plays a part in the time it takes to grow back your hair. On average hair grows 0.5 inches every 30 days to give you an idea. To grow long hair as a guy, massage warm olive oil or coconut oil into your scalp and leave it on for 30 minutes, which can help stimulate hai...