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Normally, GHK-Cu's collagen-stimulating effects outweigh this degradation
Much of the evidence comes from mechanistic studies, case reports, and retrospective analyses
Unopened vials stored at room temperature are typically stable for 2-3 years (check the expiration date)
Most absorption problems aren't treatable but a few are - notably h pylori infection - which would mean that once that has been dealt with you would be able to absorb B12 from your diet so wouldn't need maintenance shots for life
This scenario illustrates why most fatigue and nausea do not result from b12 deficiency
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