(B) Semaglutide, as a GLP-1 analog, can directly act on fat cells, increase the expression of thermogenic genes for browning phenotype maintenance, improve the expression of uncoupling protein 1 (UCP1), mitochondrial biosynthesis, and thermogenic marker, or promote fatty browning through nitric oxide synthase (NOS), neuropeptides (NPs), sirtuin 1 (STRT1), signal transducer and activator of transcription 3 (STAT3), and bone morphogenetic protein 4 (BMP4) signaling
It was derived from GHRP-1 and incorporates non-natural amino acid substitutions specifically D-2-naphthylalanine (D-2-Nal) and alpha-aminoisobutyric acid (Aib) that confer resistance to enzymatic degradation while optimizing binding affinity at its target receptor
The GHK-Cu peptide is found in many hair care, skin care products and dietary supplements
Decreasing waist circumference with stable or increasing limb measurements suggests favorable fat loss with lean mass preservation
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