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If you have a temporary deficiency or increased requirement (say, after a surgery or during recovery from an acute illness), you might only need a short course, perhaps a few weeks of injections, until your vitamin levels normalize or you can meet your needs by mouth again

Understanding your health goals can help determine the best time to take glutathione, whether in the morning for energy and metabolism or at night for detoxification and recovery

Theres no established upper intake limit for B12 from foods and supplements due to its low toxicity profile

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