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Rather than acting like a conventional pharmaceutical drug, GHK-Cu appears to function more like a biological signaling molecule
For the pathways using precursors that require a phosphoribosyl moiety, such as NAM and nicotinic acid (NA), PRPP is required 22
This helps ensure youre taking a high quality product without any questionable additives
10.1378/chest.07-0038
However, do not take two doses together to make up for a forgotten dose
Some research suggests L-glutamine may help manage symptoms in people with IBS
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