Use small amounts of liver
Ultimately, BCAAs have more substantial research linking them to recovery than to performance, but some research points toward a greater degree of efficacy when theyre taken before exercise, which is why they often end up in pre-workouts.4 33 -Hydroxy -methylbutyrate (HMB) HMB appears to act on muscles in various ways in response to training, including the inhibition of protein degradation, decreased cell apoptosis, increased protein synthesis, and stimulation of growth hormone and insulin-like growth factor-1.41 Positive effects appear to occur regardless of age, sex, or training status.6 Its often paired with creatine, but youll also find it in more complex pre-workout supplements
These pathways include BCL-XL, the cell cycle inhibitor p21, the ephrins EFNB1 and EFNB3, serpin PAI1, the oxygen sensor HIF-1 and phosphatidylinositol 3-kinase-delta (PI3K)
Current UK law generally restricts all injectable products to POM status