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Hu M et al (2019) Hyperandrogenism and insulin resistance induce gravid uterine defects in association with mitochondrial dysfunction and aberrant reactive oxygen species production

8 One similar study on a lower concentration (0.4% GHK-Cu) applied topically for venous statis ulcers, did not find benefit over placebo

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Side effects and cautions B12 has no established upper limit due to low toxicity, but injections can have side effects: Common: soreness, redness or swelling at the injection site

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