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Not having enough intrinsic factor, a stomach protein needed for B12 absorption
They are listed here as a reference for researchers investigating GHK-Cu
Even worse, many PAs are started retroactively, requiring back-and-forth calls
The researchers wondered whether the genetic glitch also affects GLP-1, a gut hormone that plays an important role in blood sugar control after a meal by stimulating insulin release, slowing stomach emptying and reducing appetite
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