And the reason for that is several fold
GHK-Cu is more specific to skin/collagen

Key benefits Why people compare it 1 14.9% mean body weight reduction demonstrated in STEP 1 trial (N=1,961) 2 20% reduction in major adverse cardiovascular events in SELECT trial (N=17,604) 3 Significant reduction in appetite and food cravings via hypothalamic POMC/CART activation 4 Improved glycemic control with glucose-dependent insulin secretion potentiation 5 Once-weekly dosing enabled by 165-hour plasma half-life and albumin binding 6 86.4% of STEP 1 participants achieved at least 5% body weight loss 7 Demonstrated NAFLD/NASH improvement with reduction in liver fat content 8 Well-characterized safety profile from over 30,000 participants across STEP and SELECT programs Deep research Semaglutide (chemical name: N-epsilon26-[2-(2-[2-(2-[2-(2-((S)-2-carboxy-3-((1S,2R)-3-carboxy-1-(carboxymethyl-carbamoyl)-propylcarbamoyl)-propionylamino)-ethoxy)-ethoxy)-acetylamino]-ethoxy)-ethoxy)-acetyl]-[Aib8,Arg34]-GLP-1-(7-37)-peptide) is a 39-amino-acid peptide with a molecular weight of 4,113.58 Da

When you experience good outcomes and a jump start on better healtha skinnier youit is often enough motivation to continue running once you reach your final goal of shedding pounds
1 2 3 "Laboratory Investigation of Vitamin B12 Deficiency"
By simply taking care of your health now, you can keep your eyes functional and get all of the other fringe benefits of B12 shots for weight loss as well