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The symptoms experienced by the patient may include weakness, pale skin, irregular heartbeat, fatigue, shortness of breath, lightheadedness, pain in the chest, headaches, and even cold hands or feet

When you are in doubt, ask your healthcare professional before using the pen

If five-on-two-off works, you might eventually transition to continuous use as your skin adapts

Supplied as lyophilised solid at 98% purity (HPLC verified) , UK-dispatched by OL Research

Reported issues, usually mild, include redness, itching, or contact sensitivity, particularly when GHK-Cu is combined with strong actives like retinoids or exfoliating acids