DHEA and its different forms

[koi1214]

I have been looking into DHEA(Dermacrine).I know DHEA is a precursor or source of our adrenal hormones.It helps our body produce the production of hormones that help our body function more youthfully.It also gives a boost in libido,IGF-1 levls,and just an over all sense of well being.At age 43 I decided to give it a try.I know
DHEA=dehydroepiandrosterone
1-Androstene-3b-ol,17-one=1ad
4-Androstene-3b-ol,17-one=4ad
5-Androstene-3b-ol,17-one= is another form I saw.

Can somebody explain the difference between these different forms?

 

[koi1214]

Bump for some help.