UPA Test Undeconate 250of the condition, but as time goes by the symptoms will normally mount up and progressively become stronger. The primary symptoms of low testosterone, all of which can be remedied by the effects of Testosterone Undecanoate include: Erectile Dysfunction (inability to maintain or obtain an erection) Loss of Libido (can refer to partial or total loss) Loss of Muscle Mass (despite diet & exercise) Loss of Strength (despite diet & exercise) Increased Body