Tier 1's (by Citadel Nutrition) ability to improve sports performance is rated as 2.15 out of 3. This rating means the evidence is mixed on the product's ability to deliver on this claim. While some of the evidence supports its use, other evidence does not. Using Tier 1 to improve sports performance may lead to positive results. This rating is different from the product's overall rating and is based on what peer reviewed journal articles conclude on its ability to perform this one claim. This page contains an indepth analysis on how this claim-rating was calculated.

Note: The ratings on this page only deal with Tier 1's ability to improve sports performance. To view the product's overall rating, visit the product's main page: Tier 1.

Table of Contents

  1. Simple Report
  2. Detailed Report
  3. References

Simple Report

Detailed Report

The detailed report is an in-depth analysis on how Tier 1's rating for this particular claim was calculated.

Claim Effectiveness Ratings

Each supplement product is a blend of ingredients. The database uses peer reviewed journal articles to rate the ingredients. These ratings are also used to rate how well products perform overall as well as on individual claims.

The supplement ingredients listed in table below are identified as affecting Tier 1's ability to improve sports performance. The rating next to the ingredient describes the ingredient's ability to improve sports performance. These ratings are averaged together and provide the product's overall ability to deliver on the same claim.

Ingredients Improve Sports Performance Rating
Creatine Monohydrate 2.1 out of 3
Beta Alanine 3 out of 3
Tyrosine 1 out of 3
Caffeine 2.5 out of 3
Product's Claim Effectiveness Rating 2.15 out of 3

Claim Research Ratings

The research rating describes how well an ingredient's ability to perform a certain claim (such as improve sports performance) has been researched. This rating is based on the amount of studies contained in the database on a particular ingredient and claim. Ingredient research ratings are averaged together to from the product's research rating for this specific cliam.

This rating is important because we need to know if there is enough research to make a valid conclusion on a product's worthiness. Ratings above 80 are ideal. Anything below 60 means there is not enoguh research to make a valid conclusion one way or another on a product's ability to deliver on this particular claim.

Ingredients Improve Sports Performance Research Rating
Creatine Monohydrate
Beta Alanine
Product's Claim Research Rating


Short-term creatine supplementation has no impact on upper-body anaerobic power in trained wrestlers
Creatine supplementation in endurance sports
Effects of creatine monohydrate supplementation on simulated soccer performance
Effect of creatine supplementation on jumping performance in elite volleyball players
Creatine monohydrate supplementation on lower-limb muscle power in Brazilian elite soccer players
Effects of plyometric training and creatine supplementation on maximal-intensity exercise and endurance in female soccer players
Creatine supplementation in young soccer players
Acute creatine supplementation and performance during a field test simulating match play in elite female soccer players
Beta-alanine (Carnosyn) supplementation in elderly subjects (60-80 years): effects on muscle carnosine content and physical capacity
Effect of tyrosine ingestion on cognitive and physical performance utilising an intermittent soccer performance test (iSPT) in a warm environment
Effects of acute sleep deprivation and caffeine supplementation on anaerobic performance
Multiple effects of caffeine on simulated high-intensity team-sport performance
Caffeine improves muscular performance in elite Brazilian Jiu-jitsu athletes
Enhancement of High-Intensity Actions and Physical Performance During a Simulated Brazilian Jiu-Jitsu Competition With a Moderate Dose of Caffeine
The ingestion of a caffeinated energy drink improves jump performance and activity patterns in elite badminton players
Enhancing physical performance in male volleyball players with a caffeine-containing energy drink
Caffeine Improves Basketball Performance in Experienced Basketball Players
The acute effects of plyometric and sled towing stimuli with and without caffeine ingestion on vertical jump performance in professional soccer players
Enhancing physical performance in elite junior tennis players with a caffeinated energy drink
Effect of Caffeine on Golf Performance and Fatigue during a Competitive Tournament