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+ Both are copper tripeptides with nearly identical size and chemistry, but AHK-Cu has a somewhat different receptor binding profile that makes it more selective for hair follicle stimulation while GHK-Cu is broader-spectrum for general skin regeneration

Cyanocobalamin should be stored at room temperature, typically between 68-77F (20-25C), away from direct light, heat, and moisture

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This is a meaningful clinical distinction that any responsible provider must communicate

Whole-picture care: We do not look at B12 in isolation

To understand why GP practices sometimes differ from these guidelines and what that can mean for you, you can read more about the nuances of B12 guidelines