The health claims are divorced from data, says Dr
URL search params for shareable state Calculator state (peptide selected, vial size, water volume, dose) lives in URL search params
In cultured human keratinocytes exposed to UVB radiation (a standard oxidative stress model), pre-treatment with 10 nM GHK-Cu resulted in: 2.8-fold increase in glutathione reductase mRNA (the enzyme regenerating reduced glutathione from its oxidized form) 2.3-fold increase in catalase expression (HO decomposition) 1.9-fold increase in ferritin heavy chain (sequestering iron, another Fenton-active metal) 62% reduction in 8-hydroxy-2-deoxyguanosine (8-OHdG) levels, a DNA oxidative damage marker The protective effect disappeared when using copper-free GHK or copper chloride alone, confirming the intact peptide-copper complex is required
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Consumers should therefore treat marketing claims with appropriate caution
Currently in Phase 3 clinical trials, retatrutide demonstrated unprecedented weight loss of up to 24.2% at 48 weeks in the Phase 2 trial published in the New England Journal of Medicine