Hair grows during late spring, summer, fall, and into the start of winter. Here is a visual update of my own hair regrowth going on right now. About half of what you see was regrown the first time I "accidentally" regrew it while developing niacin therapy (this is a chapter in my book which explains how to stimulate endogenous niacin synthesis and is not the same as taking supplemental niacin). The rest, including the new hairs at my original hairline are from the last three months while purposefully engaging in hair restoration as outlined in my book, Fuck Portion Control. What doesn't show up in the photo are all the tiny new vellus hairs that are quite translucent. I expect that a great deal more will all be grown by the end of this year, and seeing a full restoration of the original thickness next season.