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Some people say they notice an energy boost within just hours or a couple of days after their first B12 shot
But for some people, it persists
Key Takeaways GHK-Cu (glycyl-L-histidyl-L-lysine copper) is a naturally occurring tripeptide that acts as a systemic repair signal throughout the body
It then moves down the esophagus into the stomach, where cells release acid, the enzyme pepsin, and a protein called haptocorrin (HC) to protect B12
Potential side effects may include nausea, vomiting, and headaches
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