So, this October I'm supposed to make WL but I'm very close to it now
WL and BSL are exactly 6" for me. I don't take my vitamins as regularly as I should, but I always take my collagen and I think it's been helping. Considering I've trimmed about 3 times since last October, probably an inch in total counting my next trim and the fact that it hasn't been a year yet, that's good enough progress for me.
I also started scalp exfoliation this year, however, I don't put anything on my scalp due to having a sensitive scalp. I'm sure it's helping, but probably not as much as someone who does use products on their scalps.