So I've been on Biotin (5000 g ?) for just over a month now. Every day. My hairline has either matured over the last 6 years or receded super slow. It's gone a bit jagged (like Christian Bale's) with two small triangle bits thinning on the left side and the right has just thinned a bit (right side has always been higher). However, I've got 3 very dark thick hair growing in the triangle bit I probably haven't had hair in the last 4 years. About 3 mm long. I went on Biotin after seeing that guy's youtube video and read it was good for blood sugar levels anyway. Just thought I'd add some positive results from this.