Guarana Energizer 900 mg

Guarana Energizer 900 mg

Source Naturals4.6 (3,337 ratings)
Format:Tablet Quantity: 60 Tablet(s) · 60 servings
Goals
$10.15 $0.16 per serving

Product analysis

64 out of 100

Guarana Energizer 900 mg offers a single-botanical approach to short-term alertness, with effects that depend on the guarana preparation.

AI assessment of the formula, label and price. How scoring works

Nutrient Quality40

Guarana quality cannot be judged confidently from its caffeine-related description. The botanical amount does not identify an equivalent of a particular standardized preparation.

Ingredient Transparency100

The guarana amount and source description are stated. The caffeine-related description does not verify a separate caffeine amount.

Value For Money40

The value of the guarana serving remains uncertain. A reliable price comparison for its active contribution is unavailable.

Customer Satisfaction85

Customer feedback is generally favorable across a substantial review history. The ratings describe satisfaction without establishing alertness or cognitive effects.

Product Focus74

A single botanical keeps the focus on short-term alertness and attention. The expected effect remains preparation-dependent, and a separate caffeine exposure is unconfirmed.

Format
Tablet
Container
60 Tablet(s)
Per serving
$0.16
Customer rating
4.6 · 3,337 ratings
Report analysis

Goals

Energy
Impact
High effect
A+ Ingredient FitD- PathwaysB- EvidenceA+ Formulation Logic
Study evidence
Guarana No effect 8 studies
Cognitive Support
Impact
High effect
A+ Ingredient FitC PathwaysB EvidenceA+ Formulation Logic
Study evidence
Guarana Supportive 11 studies

Ingredients

IngredientAmount per servingScore
Guarana Seed Extract (Caffeine)
900 mg 85
Adults 18–50 Dairy Free Sugar Free Vegetarian
Report overview
A+ Composition And Label DisclosureB- Composition And Label Disclosure
A serving provides 900 mg of guarana seed extract. The preparation lists 22% caffeine. The caffeine amount from guarana is not stated in mg. The available information does not establish a guarana-specific value comparison.
How this ingredient is rated

Composition and Label Disclosure100

The preparation is listed as guarana seed extract. The preparation lists 22% caffeine.
Marker and Preparation Disclosure
The preparation lists 22% caffeine.

Composition and Label Disclosure70

The serving contains 900 mg of guarana seed extract. The caffeine percentage is 22%; a caffeine amount in mg is not stated.
Amount and Label Disclosure
The caffeine percentage is 22%; a caffeine amount in mg is not stated.

Commercial Price and Usability

A guarana-specific price comparison is unavailable.
Report alternatives

Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. Cognitive effects of guarana supplementation with maximal intensity cycling.
    Gurney T; Bradley N; Izquierdo D; Ronca F · The British journal of nutrition · 2023
    Randomized trial25 participantsCognitive Support forGuarana
  2. Cognitive Performance Enhancement Induced by Caffeine, Carbohydrate and Guarana Mouth Rinsing during Submaximal Exercise.
    Pomportes L; Brisswalter J; Casini L; Hays A; Davranche K · Nutrients · 2018
    Randomized trial24 participantsCognitive Support forGuarana
  3. Improved cognitive performance in human volunteers following administration of guarana (Paullinia cupana) extract: comparison and interaction with Panax ginseng.
    Kennedy DO; Haskell CF; Wesnes KA; Scholey AB · Pharmacology, biochemistry, and behavior · 2005
    Non-randomized trial28 participantsCognitive Support forGuarana
  4. The effect of plant active substances on cognitive function in healthy older adults: a systematic review and network meta-analysis of randomized controlled trials.
    Feng X; Fan S; Wei F · Frontiers in pharmacology · 2026
    Meta-analysis1,861 participants25 studies pooledCognitive Support forGuarana
  5. Effect of Guarana (Paullinia cupana) on Cognitive Performance: A Systematic Review and Meta-Analysis.
    Hack B; Penna EM; Talik T; Chandrashekhar R; Millard-Stafford M · Nutrients · 2023
    Meta-analysis328 participants8 studies pooledCognitive Support forGuarana
  6. Dietary supplements and fatigue in patients with breast cancer: a systematic review.
    Pereira PTVT; Reis AD; Diniz RR; Lima FA; Leite RD; da Silva MCP; Guerra RNM; de Moraes Vieira ÉB; Garcia JBS · Breast cancer research and treatment · 2019
    Systematic review932 participants8 studies pooledEnergy forGuarana
  7. Purified dry extract of Paullinia cupana (guaraná) (PC-18) for chemotherapy-related fatigue in patients with solid tumors: an early discontinuation study.
    del Giglio AB; Cubero Dde I; Lerner TG; Guariento RT; de Azevedo RG; Paiva H; Goldman C; Carelli B; Cruz FM; Schindler F; Pianowski L; de Matos LL; del Giglio A · Journal of dietary supplements · 2014
    Randomized trial40 participantsEnergy forGuarana
  8. Placebo-Controlled, Double-Blind, Randomized Study of a Dry Guarana Extract in Patients with Head and Neck Tumors Undergoing Chemoradiotherapy: Effects on Fatigue and Quality of Life.
    Martins SPDS; Ferreira CL; Del Giglio A · Journal of dietary supplements · 2019
    Randomized trial60 participantsEnergy forGuarana
  9. Effects of Acute Guarana (Paullinia cupana) Ingestion on Mental Performance and Vagal Modulation Compared to a Low Dose of Caffeine.
    Talik TN; Penna EM; Hack BP; Harp A; Millard-Stafford M · Nutrients · 2024
    Randomized trial20 participantsEnergy forGuarana
  10. Effectiveness of guaraná (Paullinia cupana) for postradiation fatigue and depression: results of a pilot double-blind randomized study.
    da Costa Miranda V; Trufelli DC; Santos J; Campos MP; Nobuo M; da Costa Miranda M; Schlinder F; Riechelmann R; del Giglio A · Journal of alternative and complementary medicine (New York, N.Y.) · 2009
    Randomized trial36 participantsEnergy forGuarana