There are many types of protein supplements on the market, all claiming to give you the best results.
Before I tell you what protein is the best for vertical leap training, keep in mind that all the supplements are BUSINESSES, and that their main goal is to make as much profit/money from you as possible.
With that being said, the best type of protein you can take is whey protein.
Whey protein is very easy to digest and quickly builds muscle.
It is also one of the safest proteins you can take.
If you want to see serious gains in the gym, whey protein is the way to go.