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Not required under normal lab conditions, but refrigeration is not harmful if temperature remains stable and above freezing
A separate meta-analysis that pooled results of trials in older adults with mild cognitive impairment found B-vitamin supplementation (6 to 24 months, depending on the trial) had no benefits on various cognitive parameters, including executive function, information processing speed, and episodic memory (90)
Taking too much vitamin B12 can lead to skin rashes, digestive problems, anxiety, and heart palpitations.
Vitamin B12 (Cyanocobalamin): 1000 mcg
US$ 25.80
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