Circulating neurotransmitter metabolites

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Blackcurrant formula

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Blackcurrant formula decreases circulating neurotransmitter metabolites in humans.
“These changes corresponded with significant reductions (q < 0.05) in circulating neurotransmitter metabolites xanthurenic acid, 3-methoxy-4-hydroxyphenylglycol and vanillylmandelic acid.”
Human trialHealthy older adultsBeverageBloodSingle doseAcuten = 26
Four-week supplementation with a blackcurrant formulation enhances cognitive performance, reduces mental fatigue and modulates peripheral monoamine metabolism in older adults: a randomized, double-blind, placebo-controlled, crossover study
Frontiers in pharmacology30 Sep 2026

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Four-week supplementation with a blackcurrant formulation enhances cognitive performance, reduces mental fatigue and modulates peripheral monoamine metabolism in older adults: a randomized, double-blind, placebo-controlled, crossover study

Randomised trial in 26 peopleInterventions