The hair growth industry seems to be introducing a fad every few months. Now, the buzzword seems to be polypeptide complex or multi-peptide complex. What is it, and does it work against thinning locks? As per the research by American Hair Loss Association, more than 9 in 10 who suffer from hair loss can be attributed to male pattern baldness. The symptoms occur to 66% of men by the time they hit 35 years old.