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Long-term data in humans is sparse

Heres what we know from the available data thus far: No reported toxicity in preclinical injection studies No behavioral or pathological abnormalities observed No adverse safety signals in topical skin care studies Theoretical concerns about copper overload exist, but no study to date has demonstrated this outcome with GHK-Cu

Follow-up studies demonstrated that the insulin response resulting from carbohydrate feeding can be sufficient to increase the uptake of carnitine into the muscle (2)

Published online April 1, 2006

Subcutaneous delivery supports controlled systemic exposure and predictable GH pulse activation in research protocols