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If you have kidney disease, very high doses of vitamin C might result in kidney damage
That being said, the high doses of the nootropic measured at 0.5 mg/kg/day for intraperitoneal delivery and 2.0 mg/kg/day for oral delivery, and resulted in a performance that was indistinguishable from the control group and significantly better than the animals treated with scopolamine alone [2]
Vitamin B12 : Boosts energy metabolism and prevents fatigue, allowing individuals to maintain an active lifestyle despite caloric restriction
Limited Long-Term Evidence: There is limited long-term research
These symptoms overlap with several other conditions, such as chronic fatigue syndrome, fibromyalgia and long COVID and, as a result, it is not always obvious when a referral for a serum vitamin B12 should be made
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