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A stiff neck can be a symptom of vascular disease, inflammatory disorders, infection, and malignancy
The feedback loop includes the thyroid glands and the brain
In summary, expect gradual improvements rather than an immediate surge
The reason is partly regulatory: under UK law (specifically the Human Medicines Regulations 2012), peptides marketed for cosmetic or therapeutic use in humans require MHRA authorization, which GHK-Cu currently lacks
Patients who commit to a multi-cycle series report a compounding improvement pattern: the first cycle establishes the biological foundation, and subsequent cycles build on it, consistent with what we see across all peptide protocols at Perfect B
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