Fingernails grow 3.47 millimeters a month; toenails grow 1.62 millimeters a month. Taking biotin supplements may strengthen nails and promote their growth. Avoid using nail cosmetics regularly, as ...
While fingernails grow, on average, about a tenth of a millimeter per day, there are a number of factors that can affect this rate of growth, including which hand it is, your age, hormone levels, and ...