[74] Athletes in many sports have used human growth hormone in order to attempt to enhance their athletic performance

(11)Fmoc-Pro-Gly-Lys(Boc)-Pro-Ala-Asp(otBu)-Asp(otBu)-Ala-Gly-Leu-Val-WangResin (11) Preparation of Fmoc-Pro-Gly-Lys(Boc)-Pro-Ala-Asp(otBu)-Asp(otBu)-Ala-Gly-Leu-Val-WangResin (10)Fmoc-Gly-Lys(Boc)-Pro-Ala-Asp(otBu)-Asp(otBu)-Ala-Gly-Leu-Val-WangResin(20DMF)5203DMF3DMF2Fmoc-Pro-OH0.8gDIEA0.4mlTBTU0.56gHOBT0.2gDMF10ml1.53DMF3DMF2Fmoc-Pro-Gly-Lys(Boc)-Pro- Ala-Asp(otBu)-Asp(otBu)-Ala-Gly-Leu-Val-WangResin In step (10) of Fmoc-Gly-Lys(Boc)-Pro-Ala-Asp(otBu)-Asp(otBu)-Ala-Gly-Leu-Val-WangResin, add decapping reagent (20% piperidine in DMF solution), reacted at room temperature for 5 minutes, drained, added decapping agent and reacted at room temperature for 20 minutes, washed 3 times with isopropanol, washed 3 times with DMF, washed 2 times with re-distilled DMF, drained, added Fmoc-Pro- 0.8g of OH, 0.4ml of DIEA, 0.56g of TBTU, 0.2g of HOBT, and 10ml of DMF were reacted at room temperature for 1.5 hours, dried with a vacuum pump, washed 3 times with isopropanol, washed 3 times with DMF, washed 2 times with distilled DMF, pumped Dry, obtain Fmoc-Pro-Gly-Lys (Boc)-Pro-Ala-Asp (otBu)-Asp (otBu)-Ala-Gly-Leu-Val-WangResin

So even though any professional athlete with this substance in their system would be automatically disqualified from competition, and the FDA put out advisories about the issues with compounding pharmacies making these substances (6,7), people are still getting their hands on BPC 157
many plans use them for different goals rather than interchangeably
Q: Will peptides shut down natural GH production
It works by inhibiting NNMT, leading to metabolic changes that can promote the use of fat for energy, reduce fat storage, and potentially slow down cellular aging