ZMass Testo Boost Low Testosterone increases the chances of osteoporosis due to a decrease in bone mineral density. Once the Testosterone therapy starts, you will notice a considerable change in the level of bone mineral density and at the same time your energy level will also increase due to increase in lean body mass. As a result you can indulge in increased physical activities during the therapy. Moreover the cognitive ability can also be increased with testosterone therapy. An increase in the level of this hormone will actually give you an improved memory.