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[4] However, consistently taking large amounts of vitamins from multiple sources could potentially increase the risk of side effects (for example, very high vitamin B intake from multiple supplements over time can cause neuropathy, and high niacin from many sources could affect your liver)
But if the deficiency is in high levels, Vitamin B-12 injections are suggested as an ultimate measure
People with long hours at work, busy lives, or tough physical routines might feel a stronger effect from NAD+
We do not recommend self-injecting copper peptides
Vitamin B (pyridoxine), when chronically taken in gram quantities, is known to cause a sensory neuropathy, numbness and tingling in the extremities, but the amount of B in this formula (2 mg per mL) is far below such neurotoxic levels
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