well just to be clr,. test base is a total misnomer.
Adding more sex hormones to somehow effect suppression is ridiculous really.
If you are taking a suppressive cycle, throwing more hormones into the mix will not change the level of suppression.
further, DHEA typically doesn't convert into test if the body is already sensing high androgens. It will convert into other things the body is lacking.
I'm not saying these products won't make you feel better. some people swear by them, and they have been around a long time.
My take is that they are probably raising estrogen in most people making their joints feel better and possibly many other things effecting mood and virility too.