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No finalized large-scale human clinical trials are published that demonstrate safety and efficacy in humans
In a 12-week trial, GHK-Cu applied to thigh skin improved collagen production in 70% of treated women, compared to 50% for vitamin C cream and 40% for retinoic acid
Both mechanisms increase cytoplasmic concentrations of dopamine (DA), norepinephrine (NE), and serotonin (5-HT), producing a cytoplasmic surge of monoamines
Breathing becomes shallow and irregular, heart rate drops, and body temperature falls to dangerous lows
Some individuals may experience increased energy and alertness shortly after the injections, while others may notice improvements in mood and cognitive function over time
Inflammation of the tongue
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