Has anyone taken supplemental testosterone?

In general, androgens promote protein synthesis and growth of those tissues with androgen receptors. Testosterone effects can be classified as virilizing and anabolic, although the distinction is somewhat artificial, as many of the effects can be considered both.

Anabolic effects include growth of muscle mass and strength, increased bone density and strength, and stimulation of linear growth and bone maturation.

Virilizing effects include maturation of the sex organs, particularly the penis and the formation of the scrotum in unborn children, and after birth (usually at puberty) a deepening of the voice, growth of the beard and axillary hair. Many of these fall into the category of male secondary sex characteristics.

Testosterone effects can also be classified by the age of usual occurrence. For postnatal effects in both males and females, these are mostly dependent on the levels and duration of circulating free testosterone.

Adult testosterone effects are more clearly demonstrable in males than in females, but are likely important to both sexes. Some of these effects may decline as testosterone levels decline in the later decades of adult life.

Libido and clitoral engorgement/penile erection frequency.

Mental and physical energy

Mantainance of muscle trophism

The most recent and reliable studies have shown that testosterone does not cause Prostate cancer, but that it can increase the rate of spread of any existing prostate cancer.[citation needed] Recent studies have also shown its importance in maintaining cardiovascular health.[citation needed]

Increase eumelanin and reduce pheomelanin[citation needed]

Testosterone regulates the population of thromboxane A2 receptors on megakaryocytes and platelets and hence platelet aggregation in humans (Ajayi and Halushka 2005, Ajayi et al 1995).

In animals (grouse and sand lizards) higher testosterone levels have been linked to a reduced immune system activity. Testosterone seems to have become part of the honest signaling system between potential mates in the course of evolution

i can bet u no one on yahoo answers has, if u're doing a research, go to google, no one will answer in your favour here.