When combined with an appropriate exercise program, dietary supplementation with β-hydroxy β-methylbutyrate (HMB) has been shown to dose-dependently augment gains in muscle hypertrophy (., the size of a muscle),   muscle strength ,    and lean body mass ,    reduce exercise-induced skeletal muscle damage, [note 1]    and expedite recovery from high-intensity exercise.   HMB is believed to produce these effects by increasing muscle protein synthesis and decreasing muscle protein breakdown by various mechanisms, including activation of the mechanistic target of rapamycin (mTOR) and inhibition of the proteasome in skeletal muscles.  
Among the widely used steroids is Deca-Durabolin. For the past three decades, Deca Durabolin steroid has delivered great gains to people looking for muscle mass and has the ability to reduce joint pain and boost the body’s immune system. The most important benefit of Deca-Durabolin for both amateur athletes and bodybuilders is that it doesn’t have serious side effects since it doesn’t convert to estrogen like other compounds. As such, Deca-Durabolin does not have severe or higher degree side effects that other compounds might have.