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Serious side effects are rare but may include allergic reactions, shortness of breath, and severe dizziness

Alternative Names: Copper Tripeptide GHK-Cu Studies and Research Data Insights from Fibroblast Research Scientific investigations suggest that GHK-Cu may interact with fibroblasts, specialized cells considered important for extracellular matrix regulation

However, the Schilling test is no longer available worldwide due to safety factors related to use of radioactive B12 and is now considered obsolete

Reddit threads contain plenty of posts from people reporting no benefits, unpleasant side effects, or struggles finding reputable sources

It depends on what you mean by targeted. For gut-focused support, capsules may feel more targeted because they pass through the digestive tract

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