Muscle building androgens have long since proven themselves extremely effective in the bodybuilding community. However, most users are unaware that some of the most popular androgens are progestin derivatives! Certain progestins have excellent promise in muscle synthesis and overall mass gains. Sci Fit's new H-Bomb 4 has harnessed a progestin hybrid with strong androgenic potential. This diol based methylated ingredient is combined with the three most efficient estrogen inhibitors available in supplement form. Along with the absorption aid DHB, the new H-Bomb 4 may deliver the internal fuel to bust your most outrageous expectations!Experience lasting gains and extend the growth cycle by stacking H-Bomb 4 with Sci Fit's TZ3. Alternate with two-week intervals on each product for a total time eight weeks. Be sure to keep protein levels high while supplementing with BCAA's and Glutamine. We recommend the pharmaceutical liquid soft gel delivery formulas in Sci Fit's BCAA AKG and Glutamine AKG.