What are the symptoms of hypogonadism?

Lots of overlap: Hypogonadism is medical speak for low testosterone. Symptoms are non-specific. In other words, you might have something else if you're depressed, can't think straight, no interest in sex, loss of erectile function, loss of muscle mass, increase in fat, etc. While this can occur in younger men, this constellation of symptoms increases in frequency in our 40s and older. So ask your doctor for testin.

As above: I agree the level of testosterone and free testosterone is a simple blood test. If low "low T' you can easily replace that hormone with injections, patches, gels and even oral administration via the gum.