A business which promises you to gain more muscle mass (skeletal muscle) is good business. Also a business which promises you to lose body fat (adipose tissue) is good.
The more testosterone, the better.
For both men and women, the more “T” (testosterone) you got, the better. More test (testosterone) leads to LESS anxiety, LESS depression in both men AND women.
Search testosterone in PubMed
Testosteome a hot topic in PubMed: