ArticlePloS one2015
Guarana provides additional stimulation over caffeine alone in the planarian model.
Article in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 1 of them a synthesis that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
12 citing papers in PubMed, 1 synthesis or guideline pooled it, 41 citations in OpenAlex.
- A Systematic Review of the Effect of Dietary Supplements on Cognitive Performance in Healthy Young Adults and Military Personnel.Nutrients · 2020Pooled it
- Nutrition, Physical Activity and Other Health Aspects Before and During Pregnancy - Recommendations by the Nationwide "Healthy Start Network" (Netzwerk Gesund ins Leben) 2026.Geburtshilfe und Frauenheilkunde · 2026Article
- Within- and Between-Subject Analyses of the Effects of Chronic Xylazine on Negative Phototaxis in Two Planarian Species.Biomolecules · 2025Article
- Article
- The Dark Side of Energy Drinks: A Comprehensive Review of Their Impact on the Human Body.Nutrients · 2023Review
- Persistence of Nocturnality in Decapitated and Bisected Flatworms.Journal of biological rhythms · 2023Article
- Energy drink produces aversive effects in planarians.Physiology & behavior · 2022Article
- Review
- Article
- Dugesia japonica is the best suited of three planarian species for high-throughput toxicology screening.Chemosphere · 2020Article
- Nutritional Interventions for Treating Cancer-Related Fatigue: A Qualitative Review.Nutrition and cancer · 2019Review
- Planarian brain regeneration as a model system for developmental neurotoxicology.Regeneration (Oxford, England) · 2016Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The stimulant effect of energy drinks is primarily attributed to the caffeine they contain. Many energy drinks also contain other ingredients that might enhance the tonic effects of these caffeinated beverages. One of these additives is guarana. Guarana is a climbing plant native to the Amazon whose seeds contain approximately four times the amount of caffeine found in coffee beans. The mix of other natural chemicals contained in guarana seeds is thought to heighten the stimulant effects of guarana over caffeine alone. Yet, despite the growing use of guarana as an additive in energy drinks, and a burgeoning market for it as a nutritional supplement, the science examining guarana and how it affects other dietary ingredients is lacking. To appreciate the stimulant effects of guarana and other natural products, a straightforward model to investigate their physiological properties is needed. The planarian provides such a system. The locomotor activity and convulsive response of planarians with substance exposure has been shown to provide an excellent system to measure the effects of drug stimulation, addiction and withdrawal. To gauge the stimulant effects of guarana we studied how it altered the locomotor activity of the planarian species Dugesia tigrina. We report evidence that guarana seeds provide additional stimulation over caffeine alone, and document the changes to this stimulation in the context of both caffeine and glucose.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.