I am answering you citate from famous book of Dr. Colbert ” I can do this diet”:
Getting older ushers in many health changes, including losing muscle and gaining fat. As we age, not only do we lose muscle mass, but also most people experience decreased levels of hormones – particularly anabolic hormones, which help build muscle and include testosterone, dehydroepiandrosterone (DHEA), and growth hormone. This hormone imbalance can severely stunt any weight-loss efforts.
DHEA is precursor of Testosterone synthesis and available now in GNS stores across USA.
Testosterone boosters are hyped alot, same as weight loss products.
If you feel you suffering on low testosterone level you should first of all talk about that to your doctor. Basically every working out person has his normal testosterone level. Start with correct nutrition, sleep well.
Here is a great article about low testosterone symptoms and about how to increase testo level naturally :