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Research suggests that its activity may be linked to VEGF and TGF- signaling, fibroblast activation, and endothelial function

as levels normalise, improved daytime energy may temporarily affect sleep-wake cycles Individual sensitivity : A small subset of people may be more sensitive to changes in B vitamin levels Formulation factors : Some B12 supplements contain additional ingredients that could affect sleepalways check product labels for stimulants like caffeine For the vast majority of people, vitamin B12 supplementation does not cause sleep disturbances when taken as directed

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There are many other conditions that can lead to vitamin B12 deficiency

Formulated and tested for purity by U.S.-licensed pharmacies