It also helps you battle on-going depression, no matter how hopeless it may seem. In fact, psychiatrists and psychologists even identify testosterone treatment as a valid therapy for deep depression in those whose levels are low and no anti-depressant has been able to help. Another fact is that testosterone deficiency is in fact linked to risk of dementia and Alzheimer’s disease. Treatment improves cognitive function manyfold, allowing you to think clearly and retain memory function with no problem. This has been tested and proven by credible sources such as University of Southern Carolina.