Spermidine has been shown to promote human hair growth

A study published in 2011 showed promising results for the use of spermidine for combating hair loss. Spermidine is a polyamine responsible for regenerating cells and promoting youth. It was first found in semen fluid which explains its name. Spermidine is found in several food sources such as corn, broccoli and green peas. The conclusion from the researchers was that spermidine was a potent stimulator of human hair growth, but it was found to produce a 20% increase in hair-shaft growth in just 6 days. However, it has previously been shown that spermidine is found in high concentrations in psoriasis leasions, indicating that it might have a cause in the overproductiong of skin cells. Therefore it's role in hairloss might be complex and too much might not be a good thing either. It's therefore advisable to wait until further research has been conducted before shopping for spermidine, wich is actually hard to find as a supplement. For full study click on the link below.

http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0022564