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J Pediatr 143:224230

What community members commonly report: Injection-site reactions (redness, swelling) expected with large-volume subcutaneous injections Mild flu-like symptoms in the 24-72 hours following injection, which some interpret as an immune response to senescent cell die-off Fatigue and general malaise lasting 1-3 days post-injection No noticeable positive effects yet What community members probably will NOT notice: Improved energy or vitality Visible changes in skin, hair, or physical appearance Measurable changes in bloodwork Any performance enhancement Realistic expectation: Week 1 is about initiating the senolytic process

This supports the long-term stability when asking "does GHK-Cu need refrigeration?" and then acting on it

Everything else in this article (the protocol, the cadence, the post-care, the device pairing) is downstream of that single decision

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Int J Mol Sci 22(3):22:1350