DHT is a non-aromatizing androgen, means it doesn´t convert to estrogen at all. This is important because estrogen is suppressive of LH production (1), which is of course going to be an aggravating factor in lowering your endogenous testosterone production. DHT, in addition to not converting to that nasty test-suppressive-estrogen, will not inhibit LH production or testosterone production (1) (2) (3). DHT may even have a suppressive effect on estrogen, in some cases. This would certainly account for its ability to actually have a positive effect (again, in some cases) on LH and testosterone.

Your body reduces DHT to inactive metabolites by way of the 3-alpha-hydroxysteroid dehydrogenase enzyme before alot of it can reach the androgen receptors in skeletal tissue. This means while it reaches your scalp and prostate relatively intact, it doesn´t make it to your muscles that way. This is why we see so many different alterations of DHT available on the market, from Anadrol 50 to Anavar, with so many different uses. Andractim has the most unique use, though, I think.

Andractim has been used with some success to reduce gyno in males. It´s possible that a lowering of circulating DHT-levels can cause Gyno (5)(6), and certainly androgen therapy with DHT derivatives has been found useful for treatment of gyno... so it´s very logical that a topical DHT would be a good bet for Anabolic/Androgenic Steroid induced Gyno.

Andractim Testosterone Gel

Andractim testosterone gel is a topical gel, which comes in a tube, containing 80x 25mg doses of DHT. Absorption rate is going to be similar to testosterone gel, or roughly 10%.

Source: steroid.com