dopamine is a neurotranismitter that comes from tyrosine, dopamine is the first in the chain for making testosterone, so if you have more dopamine more testosterone is made for the penis, GLA( gamma linolenic acid) is a nutrient that helps grow the skin, so when your growing your penis the skin will be able to stretch and accomodate the size, aswell it can help make the spongy tissues of the penis more stretchy for erections, basically a DHt inhibitor is something that stops the DHT affects of DHT working or just stops DHT totally, an inhibitor basically stops something that is specific from working. A 5 alpha reductase activator is something that sends a message to the liver to produce more of the enzyme 5 alpha reductase from this more DHT is made so it can grow the penis, prostogladins are lipids that are made from essential fatty acids (EFA), from this it helps the penis to become more elastic especially the skin so you can get greater erections and prevents inflamation of the penis so thats why when you jizz a lot you get a sore penis because it is inflamed and semen contains prostogladins. And finally l-dopa, this is just a precurser to dopamine meaning that it does the exact same job as dopamine itself even though they are not 100% similiar. remeber all these things we take in are just percursors to do the same job as the real hormones, so we can trick the body or well the penis into growing again.