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Deficiency is widespread in the UK due to limited sunlight exposure, and is particularly prevalent in those with chronic illness, darker skin tones, or conditions affecting fat absorption
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The online market is filled with unregulated sellers offering products that are meant for "research purposes only." Buying from these sources is risky because you have no guarantee of the product's purity, dosage, or safety
To be clear up front: Koi Peptides sells research-grade, sterile lyophilized GHK-Cu powder for in vitro laboratory study only
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