Product analysis
Guarana Energizer is aimed at short-term alertness through caffeine-bearing guarana. The caffeine quantity is unresolved, making its likely strength and alertness effect difficult to predict.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality36
The quality of the guarana preparation cannot be established confidently. Calcium’s form is also undisclosed, preventing a firm judgment about its absorption potential.
Ingredient Transparency81
Both ingredient amounts are listed, but calcium’s form is missing. The guarana quantity does not establish a clear caffeine amount, making its likely stimulation difficult to judge.
Value For Money40
The available information does not support a firm value judgment for either ingredient. Guarana’s unresolved caffeine quantity also makes useful serving comparisons difficult.
Customer Satisfaction74
Customer ratings are very positive, based on a very small body of feedback. The limited number of reviews makes that impression less settled.
Product Focus74
The formula is directed at alertness and energy rather than broad mental performance. Its unresolved caffeine amount and preparation differences leave the practical effect uncertain.
- Format
Tablet - Container
- 100 Tablet(s)
- Per serving
- $0.14
- Customer rating
- 4.9 · 13 ratings
Goals
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
Calcium | 33 mg | |
Guarana seed ext. (Caffeine) | 900 mg |
How this ingredient is rated
Composition and Label Disclosure100
Marker and Preparation Disclosure
Composition and Label Disclosure70
Amount and Label Disclosure
Commercial Price and Usability
Alternative products
Sources
Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.
- Cognitive effects of guarana supplementation with maximal intensity cycling.
- Cognitive Performance Enhancement Induced by Caffeine, Carbohydrate and Guarana Mouth Rinsing during Submaximal Exercise.
- Improved cognitive performance in human volunteers following administration of guarana (Paullinia cupana) extract: comparison and interaction with Panax ginseng.
- The effect of plant active substances on cognitive function in healthy older adults: a systematic review and network meta-analysis of randomized controlled trials.
- Effect of Guarana (Paullinia cupana) on Cognitive Performance: A Systematic Review and Meta-Analysis.
- Dietary supplements and fatigue in patients with breast cancer: a systematic review.
- Purified dry extract of Paullinia cupana (guaraná) (PC-18) for chemotherapy-related fatigue in patients with solid tumors: an early discontinuation study.
- 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.
- Effects of Acute Guarana (Paullinia cupana) Ingestion on Mental Performance and Vagal Modulation Compared to a Low Dose of Caffeine.
- Effectiveness of guaraná (Paullinia cupana) for postradiation fatigue and depression: results of a pilot double-blind randomized study.