Yes, calisthenics can be progressed to be quite difficult. Planches and handstand pushups require a ton of stabilizer muscle strength and a ton of balance. This makes them rather impressive (and fun) … but the very thing that makes them impressive also makes them rather poor at building up muscle mass. Even with advanced progressions of bodyweight workouts the limiting factor will very rarely be mechanical tension in the targeted muscle, but rather stabilizer muscle strength and/or balance. As a result, your balance and stabilizer muscle strength will improve while your muscle size will remain more or less the same.
Hormone testosterone is produced by human body naturally and assists in transformation of fat accumulated into energy. However, when a person is deficient in this hormone, he may suffer from loss of strength and loss of muscle mass. They can accumulate body fat more easily, feel fatigued easily, and lose sexual desire. This hormone is present in body of men and women, however, in female organism, it is present in lower levels. Therefore, supplement can better serve people who suffer from this shortage, helping it reach its goal more easily.