You can definitely grow your hair in a week – but not very much. Hair grows at a rate of 0.35 millimeters per day, so after seven days, your locks will be 2.45 millimeters -- or 0.01 inch -- longer. In a month, though, this adds up to about 1/4 inch of growth
https://nutritions4.com/hair-revital-x/
https://nutritions4.com/hair-revital-x/