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Adverse reactions reported following methylcobalamin administration include headache, infection, nausea/vomiting, paresthesias, and rhinitis

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Why Choose an Intramuscular Injection

The trial tested oral administration primarily, and no controlled study has tested subcutaneous injection in humans

As you get older, the systems that rely on NAD+ (like energy production, cognitive function, skin repair, immune health, and inflammation regulation) start to slow down, and declining NAD+ levels appear to be a key driver behind that slowdown