Dhea is not a vitamin it's dehydroepiandrosterone which is a hormone precursor product winding up delivering testosterone after its metabolically converted in the body
it's how they get around the restriction for selling anabolic steroids
if you want to try testosterone you can get a prescription for it, it'd be a known amount

hormones are tricky things, linked with promoting certain cancers, but it's a quality of life issue that's in play
yes testosterone can increase libido in women, it can also cause masculinization side effects, lowered voice, facial hair, etc., so dosing is very important
quality of life is important, just be not-bold when experimenting with hormone therapies

They use 1-2% testosterone ointment on genitals for 6 weeks then 0.5 mg/day of estratest by mouth...But long term studies are not available as to the effect of test over the long term...Acne, irritability, hirsutism (maleness)....Some women rave over the effects, you may want to ask about this, the ointment is pharmacist compounded as its not avail commercially yet