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A recent systematic review and meta-analysis of 21 randomized, placebo-controlled trials examining the effect of B-vitamin supplementation found the supplementation decreased homocysteine concentrations and improved measures global cognitive function but had no effect on individual measures of executive function, information processing speed, or episodic memory (89)

PMID 16126935

Concentration use ranges from 0.1-1.0% depending on the formula

B., Jackowich, R

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Third-party testing for identity, purity, and absence of endotoxin contamination should be verified for any peptide intended for research use