A recent survey commissioned by the Eurogroup for Animals, polled approximately 11,000 EU citizens from eight member states on the abolition of animal testing in research, testing, and education, with 77% of EU citizens in favor of phasing out animal testing (326)
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Research overwhelmingly describes the safety of GHK-Cu positively, such as when the authors of a 2018 review called it a safe, inexpensive, extensively studied compound.14 However, even though copper peptides have demonstrated an impressive safety track record in studies, there are (as with most skin care actives) a few safety risks to consider
Sales are restricted to research and laboratory use only not intended for human, veterinary, or any clinical application
However, if you want to know what to avoid when taking glutatione besides this, here is a list of things that may be a problem, 1
If no irritation is observed, you can proceed with regular use