GHK-Cu is a naturally occurring copper peptide complex composed of the tripeptide glycyl-L-histidyl-L-lysine (GHK) chelated to a copper(II) ion
Levels can quickly deplete in 10 to 20 days
Regularly monitoring your blood pressure and heart rate at home can help track your condition and alert you to changes that require medical attention
While overdosing on vitamin B12 is said to be highly unlikely, experts believe it is possible to have elevated B12 levels

The following are the most consistently reported signs: Sudden, sharp tightening in a specific muscle group (back, neck, leg, shoulder, calf, hand, or forearm) Muscle twitching or visible rippling beneath the skin a phenomenon called fasciculationsespecially in the abdomen, thighs, or eyelids A hard, knotted area in the muscle that is tender to the touch (often called trigger points or muscle knots) Reduced range of motion after a spasm, coupled with muscle stiffness lasting hours or days Burning or aching pain radiating from the spasm site common in cervical spasms and lumbar back spasms Nocturnal cramping waking from sleep due to leg cramps at night, charley horses, or toe cramps Stomach twitching or quivering in the abdomen, particularly with dehydration or electrolyte imbalance Root Causes of Persistent Muscle Cramps & Spasms Understanding what causes chronic muscle spasms is the most important step toward effective treatment