L Carnitine: energy and fat burning. Recosport L Carnitine Injection Wisdom Understanding The Difference Between Ipamorelin Vs. Semorelin HGH vs Peptides: Which Hormone Therapy Is Right for You? Human Growth Hormone (HGH) plays an important role in energy, metabolism, muscle development, recovery, and overall vitality. However, HGH levels naturally decline as we age. By the time many adults reach Figure 3 from Ipamorelin, the first selective growth hormone secretagogue. Semantic Scholar