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135 Another study has shown that tobacco smokers had greater odds of high-frequency hearing loss compared to non-smokers

[DOI] [PMC free article] [PubMed] [Google Scholar] 21.Hoffmann K., Boeing H., Volatier J.L., Becker W

10.1136/bmjopen-2012-000990 114 JrgensenN.VierulaM.JacobsenR.PukkalaE.PerheentupaA.VirtanenH.et al (2011)

These medications have been extensively applied in clinical practice, with their safety and efficacy well-established

You might see injectable GHK-Cu offered by online gray-market retailers selling supplies from unregulated pharmaciesbut this is a big red flag and safety risk

doi: 10.1016/0022-510X(90)90004-7 92 EskelinenE.-L