Semax can make your hair fall out slightly selank doesn't . Ive heard good stories about both . Try them both out but start with semax . Do it long term .

Fasting can increase bdnf by 3.5 times . Research intermittent fasting and also long term fasting (48 hours) .

There is just so much that can increase bdnf but as a rule of thumb when it comes to herbs . Studies mostly are short term and just not as good .

I recommend coming over to the nootropics subreddit and research/ask there