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Improperly synthesized or degraded GHK-CU may contain free copper ions that cause oxidative damage without providing peptide benefits
As albumin exceeds the size limit for glomerular filtration, this major elimination route is lost (Malm-Erjeflt et al ., 2010)
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One study found that taking 2,000 milligrams of metformin each day for a year helped older adults with amnestic mild cognitive impairment (a precursor to Alzheimer's) improve their memory recall
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