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Both contain the same NAD+ molecule
GHK-Cu had a higher collagen responder rate (70% vs 40%) in the only direct comparison, and showed 55.8% wrinkle volume reduction at eight weeks in a split-face trial
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B12 shots might benefit people dealing with: Constant tiredness Low blood cell counts Trouble digesting Pernicious anemia Low nutrient levels Struggles with weight loss A study showed that injecting B12 into the muscle raised levels in the blood faster and kept them higher for longer than taking B12 by mouth in those with absorption problems
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