Benefits
Working memory in healthy adults
In healthy adults aged 30-60, 600 mg Cognivia™ vs placebo daily, the most consistent benefit appeared on accuracy and working memory tasks, with chronic effects stronger than acute. The benefit was confined to three tasks in the COMPASS battery (Corsi blocks span, numeric working memory accuracy, name-to-face recall accuracy); mood, state and trait anxiety, prospective remembering and blood pressure all showed no effect, the results were not corrected for the number of outcomes tested, and 69% of participants correctly guessed which treatment they had been given, so blinding was incomplete.
Reaction time and perceived exertion during physical activity
In a crossover trial in physically active adults (26 enrolled, 17 analysed) given a single 600 mg dose two hours before a fatiguing cycling test, backward digit-span score was 6.0% higher than placebo (95% CI 0.2 to 11.9, p=0.044), simple reaction time was 34 ms faster averaged across test points (p=0.023), and rating of perceived exertion was about 0.3 points lower on a 10-point scale (p=0.002). Stroop reaction time, Stroop accuracy, the digit memory score and heart rate did not differ from placebo, and cycling power output was held constant, so no measure of physical performance itself improved. Only a single dose was tested.
Effects reported after a single dose and after four weeks
The cycling trial tested a single 600 mg dose only, with testing beginning two hours later. The separate 29-day trial dosed daily and measured the same people on day 1 and again on day 29; its working-memory differences were clearest on day 29. Daily use beyond one month has not been studied.
Synergy from combined sage species
Garden sage is rich in polyphenols (rosmarinic acid, carnosic acid); Spanish sage is rich in monoterpenes (1,8-cineole, camphor, alpha-pinene). In a Nexira-funded study in healthy mice, all three sage preparations affected Y-maze performance on day 1, but only the two-species combination improved Morris water maze performance after two weeks of feeding. The combination has never been compared head-to-head against either sage alone in people, so the synergy rationale rests on the mouse data.
Mechanism of action
Acetylcholinesterase inhibition (modest)
Both sage species contain compounds that inhibit acetylcholinesterase in laboratory assays, which would in principle slow acetylcholine breakdown at synapses. No study has measured cholinesterase activity in people after they take this blend, so the link between the enzyme assay and the cognitive results is inferred rather than demonstrated. The effect is modest — not comparable to pharmaceutical AChE inhibitors used for Alzheimer's disease.
CamKII pathway activation
In the Nexira-funded mouse study, brain expression of CaM kinase II (Calcium/Calmodulin-dependent protein Kinase II), an enzyme involved in memory consolidation, was higher in sage-fed animals. The same study looked for and found no change in neurogenesis, neuronal activity or neurotrophins, so the plasticity picture rests on this single marker, and it has not been measured in people.
Encapsulated essential oil delivery
The Spanish sage essential oil is encapsulated to protect volatile monoterpenes (1,8-cineole, camphor, α-pinene) from oxidation and to allow incorporation into capsule, tablet, stick pack, or powder formats.
Polyphenol antioxidant activity
Rosmarinic acid and carnosic acid in garden sage have antioxidant and anti-inflammatory effects in cellular models. That has not carried over to the finished blend in a living animal: the mouse study found no significant effect on lipid peroxidation or oxidative stress markers, and no antioxidant marker has been measured in either human trial.
Clinical trials
Wightman EL, Jackson PA, Spittlehouse B, Heffernan T, Guillemet D, Kennedy DO. Nutrients. 2021;13(1):218. PMID 33466627. Registered NCT03695003.
94 healthy adults aged 30-60
Randomized, double-blind, placebo-controlled, parallel-group study, n=94 healthy adults aged 30-60, 600 mg Cognivia™ (400 mg garden sage extract + 50 µL Spanish sage essential oil) or placebo daily for 29 days. Significant differences favouring sage appeared on three tasks — Corsi blocks span, numeric working memory accuracy and name-to-face recall accuracy — and were strongest on day 29. The rest of the battery was null, including mood, state and trait anxiety, prospective remembering and blood pressure, and results were not corrected for the number of outcomes tested. Placebo participants had a significantly higher Corsi blocks span at baseline. 69% of participants correctly guessed their allocation (p=0.02), so blinding was incomplete. Sponsored by Nexira SAS, with a Nexira author.
Babault N, Noureddine A, Amiez N, Guillemet D, Cometti C. Front Nutr. 2021;8:771518. PMID 34926550. Registered NCT04804657.
26 physically active adults enrolled, 17 analysed (mean age about 27, 5 women and 12 men)
Randomized, double-blind, placebo-controlled crossover trial. A single 600 mg dose of the sage combination or placebo was taken two hours before a fatiguing cycling protocol, with the two sessions a week apart. Backward digit-span score was 6.0% higher than placebo (95% CI 0.2 to 11.9, d=0.53, p=0.044), simple reaction time was 33.7 ms faster as a main effect (d=0.61, p=0.023), and rating of perceived exertion was 0.3 points lower on a 10-point scale (p=0.002), reaching significance at the two later time points. Stroop reaction time (p=0.94), Stroop accuracy (p=0.20), digit memory score (p=0.07) and heart rate (p=0.70) did not differ from placebo. Only 17 of 26 enrolled participants were analysed. The product was supplied by Nexira, which also covered publication costs, and a Nexira employee is a co-author; the paper notes the capsule taste could not be masked and two participants identified the product.