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These can also trigger a rare allergic reaction called anaphylaxis
Definitely improved energy, especially since Ive been off caffeine
A vitamin B12 deficiency affects energy levels and immune health and may cause neurological problems like numbness and tingling in your hands and feet
Vitamin B12, Fact Sheet for Health Professionals, National Institutes of Health, Office of Dietary Supplements Common questions about hydroxocobalamin, NHS (National Health Service), Hunt A, Harrington D, Robinson S
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