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Nevertheless, there have been rare reports of people experiencing severe allergic reactions to vitamin B12 supplements
They share the same receptor pathway, and doubling up dramatically increases the risk of severe gastrointestinal side effects without proportional benefit
Cycling is precautionary given limited long-term data, it reduces theoretical risk of receptor desensitization
The landmark DSIP sleep study used 25 nmol/kg IV for 7 consecutive nights , measured via polysomnography
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