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Nasal delivery is theoretically plausible but bioavailability data for this specific peptide do not exist in published literature
Some people may experience temporary skin irritation when using topical GHK-CU products
Who Should Avoid Copper Peptides Most people can safely use copper peptides, but caution is warranted in certain situations: Wilson's disease or other copper metabolism disorders Known allergy to copper or peptide ingredients Active scalp infections or open wounds Pregnancy and breastfeeding (insufficient safety data) When in doubt, consult a dermatologist or healthcare provider before starting treatment
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Of course, theres also a chance that your body isnt absorbing enough B12 to absolve the symptoms of deficiency
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