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Description
A serum B12 level test and, ideally, a methylmalonic acid (MMA) test should precede any B12 injection recommendation

It involves a sudden loss of consciousness, stiffening of the body (the tonic phase), followed by rhythmic jerking movements of the limbs (the clonic phase). The child may cry out at the onset, may turn blue around the lips due to a brief interruption of normal breathing, and will typically be unresponsive and confused in the minutes to hours following the episode, a period known as the postictal phase
Higher NNMT levels have also been observed in patients with some forms of muscular dystrophy [12]

Once the copper is released from the GHK complex inside skin cells, it is used locally by copper-dependent enzymes like superoxide dismutase and lysyl oxidase