I have read that stinging nettle extract binds to SHBG therefore releasing free testosterone into the bloodstream and is put into alot of men's supplements!

Also that Tongkat Ali (Eurycoma Longifolia Jack) which is sometimes called longjack blocks negative feedback inhibition, this is also in alot of bodybuilding supplements!

Do these work and actually do what they are claimed to do?

How good are they?

Do they have side effects?