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Tang, M.W., et al., Insight into the Endocrine System and the Immune System: A Review of the Inflammatory Role of Prolactin in Rheumatoid Arthritis and Psoriatic Arthritis

In both in vitro and in vivo models, the study reported that GHK-Cu reduced the production of TNF- and IL-6 through the suppression of NFB p65 and p38 mitogen-activated protein kinase (MAPK) signaling

Several deserve explicit correction, because a researcher encountering them should know how weak their foundations are

What the model cannot tell us is whether the same effect size, or any effect, would appear in intact human tissue, or whether the systemic exposure needed to achieve it would be safe