🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 25% of ingredients have research evidence
B Label Compliance Grade

Product Label

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Label Data

55 Gram(s) Serving Size
18 Servings
Non-Nutrient/Non-Botanical Product Type
25% Evidence Coverage

Supplement Facts — Evidence Check

Calories
200 Calorie(s)
Total Carbohydrates
50 Gram(s) (18% DV)
Karbolyn
50 Gram(s)
250 mg
📊 Market median: 180.0mg (239 products) 📚 43 studies (Tier A: 1, B: 19)
This product: 250mg UL 400mg

Other Ingredients

Natural & Artificial Flavors Citric Acid Sucralose

Label Claims — Verification

Nutrient
All Other
Structure/Function
All Other (98% of products) Structure/Function (93% of products) Nutrient (19% of products)

Target Groups

Adult (18 - 50 Years) Women (not pregnant or lactating)

Product Information

📋 Directions for Use

How to use Karbolyn Suggested use for individuals As a dietary supplement, mix 2 scoops in a shaker cup with 16 Oz of water and drink 30 minutes before exercise.

⚠️ Warnings & Precautions

Keep out of the reach of children.

Warning: This product contains caffeine and methylxanthines. In certain people, consumption of caffeine causes serious health effects, such as anxiety, palpitations, irritability, difficulty sleeping and stomach complaints.

Do not use this product if you are pregnant or breast feeding.

🧪 Formulation Notes

What is this "performance carbohydrate" Karbolyn? Karbolyn represents the dawn of a new era of carbohydrate supplementation. Derived from potato, rice and corn, this fast-acting, long-lasting, high-performance compound offers the best of both simple and complex carbohydrates.

Simple carbohydrates have the ability to enter the bloodstream quickly. However, they can also stimulate a strong "spike" and subsequent "crash" due to a rapid rise and fall of insulin levels. This may be good for a quick burst of energy but not for sustained endurance. Complex carbohydrates do provide sustained endurance. But, they are slow to digest, and can leave you feeling bloated and lethargic.

Karbolyn delivers the best of both worlds Karbolyn is absorbed into the bloodstream like a simple sugar but without the typical crash caused when you muscles run out of fuel. It has also been shown to be absorbed as quickly as pure Dextrose (a simple carbohydrate). Yet, it still provides sustained energy without "crashing". Don't take our word for it...what does the study say? The Clinical Study sought to document whether or not Karbolyn has a positive and sustainable impact on blood sugar levels in normal adults during aerobic activity. Data obtained from participants indicated that a simple sugar promoted a steep drop and subsequent "crash" at a predictable point in time. Karbolyn gave an overall smoother decline in blood glucose level. Karbolyn Study Data - Re: IRB No: 29443/1; KL-001 - Study: July 2014-March 2015

Performance carb + caffeine

Energy Endurance Recovery

Gluten free

Proudly manufactured by All American Pharmaceutical Made in USA.

Additional Information

Protect from heat, light and moisture. Store at 59-86 degrees Fahrenheit (15-30 degrees Celsius).

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In God we trust. EU plant # 1000135313

Product Details

UPC / SKU 7 37190 00406 7
DSLD Entry Date 2022-02-23
Product Type Non-Nutrient/Non-Botanical
Form Powder
Brand EFX Sports
DSLD ID 259282
Data Updated 2026-04-11

Research Evidence

82 Research Sources
51 Avg Quality Score
28 Rct
19 Meta Analysis
17 Clinical Trial
16 Systematic Review
A Preconception lifestyle advice for people with infertility
Meta Analysis The Cochrane database of systematic reviews 2021
B The effects of caffeine intake on weight loss: a systematic review and dos-response meta-analysis of randomized controlled trials
Meta Analysis Critical reviews in food science and nutrition 2019
B Effects of caffeine chewing gum supplementation on exercise performance: A systematic review and meta-analysis
Meta Analysis European journal of sport science 2023
B Genetic susceptibility to caffeine intake and metabolism: a systematic review
Systematic Review Journal of translational medicine 2024
B Pharmacological interventions for sleepiness and sleep disturbances caused by shift work
Meta Analysis The Cochrane database of systematic reviews 2014
B Effects of Caffeine Intake on Endurance Running Performance and Time to Exhaustion: A Systematic Review and Meta-Analysis
Meta Analysis Nutrients 2022
B The effects of green tea extract supplementation on body composition, obesity-related hormones and oxidative stress markers: a grade-assessed systematic review and dose-response meta-analysis of randomised controlled trials
Meta Analysis The British journal of nutrition 2024
B Effect of green tea catechins with or without caffeine on anthropometric measures: a systematic review and meta-analysis
Systematic Review The American journal of clinical nutrition 2010
B Caffeine, CYP1A2 Genotype, and Endurance Performance in Athletes
Rct Medicine and science in sports and exercise 2018
B The combination of L-theanine and caffeine improves cognitive performance and increases subjective alertness
Rct Nutritional neuroscience 2010
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