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Another study examined the effects of six weeks of therapy in older men
Annals of Clinical and Laboratory Science, 45(4), 426432
Guideline 4: Measurement and Concentration Standards Getting the right amount of vitamin B12 in injections is very important
Pyridoxine (Vitamin B6) Vitamin B6 is a coenzyme for more than 100 enzyme reactions, including amino acid metabolism and neurotransmitter synthesis
For those deficient in B12, one shot may provide symptom relief for 5-7 days on average before you start feeling fatigued or off again
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