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It is important to remember that most of these methods act synergistically together and their combined effect on your immune system will be much more beneficial than any one element taken alone
Biol 29 , 15881600 (2022)
10.1161/CIRCULATIONAHA.125.074700 61
Additionally, a randomized, double-blind, placebo-controlled trial in 162 elderly people (70 years) with mild vitamin B 12 deficiency found that vitamin B 12 supplementation for 24 weeks, alone or in combination with folic acid, did not improve memory performance (117)
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