Branched chain amino acids (BCAAs) have become one of the most popular supplements in the fitness in...read more
Peri-Rx with Caffeine by Barbell Medicine Review
Peri-Rx with Caffeine is a pre-workout supplement manufactured by Barbell Medicine. It ranks 1 out of 601 pre-workout supplements and earned an overall thumbs-up recommendation based on seven factors including nutrition label transparency, ingredients, dosing, claims, research rating, and ranking.
This page contains a thumbs-up or down recommendation followed by simple and detailed reports describing the product's effectiveness. The detailed report includes a more in-depth analysis of the product.
A question mark appears next to a section which corresponds to a question in the FAQ. Click it for more information.
Peri-Rx with Caffeine earned a thumbs-up recommendation. This recommendation is based on the criteria listed below. To earn an overall thumbs-up recommendation, a product must earn a thumbs-up in at least four of the seven areas below. Click on a graded area for an in-depth analysis.
|Graded Area||Thumb Up or Down|
|Nutrition Label Transparency|
|Ranking Within Category|
- Simple Report
- Detailed Report
- Ranking Within Category
The detailed report provides an in-depth analysis of the product's rating. In addition to showing ratings for each area, this report also provides the required criteria for a thumbs-up in each section.
Peri-Rx with Caffeine earned a thumbs-up in this category because its effectiveness rating is 2.01. A product's effectiveness rating must be at least 1.5 to receive a thumbs-up in this area. This effectiveness rating means Peri-Rx with Caffeine is made up of a mix of both high and low-quality ingredients and may lead to some positive results.
This category illustrates how well a product works based on what the research says about its ingredients. Researchers conduct studies on supplement ingredients to gauge effectiveness. The database grades products on how effective their ingredients are. The effectiveness rating of supplement products is evaluated on a 3 point scale: 3.0 is the most effective, 1.0 is the least effective.
Peri-Rx with Caffeine earned a thumbs-up in this category because it contains 100% extremely and/or moderately effective ingredients. A product must contain at least 75% extremely and/or moderately effective ingredients to receive a thumbs-up in this area.
This category rates a product's ingredient makeup. A product should contain mostly extremely and/or moderately effective ingredients with little or no ineffective ones. The database categorizes ingredients as extremely, moderately, or ineffective based on conclusions from research articles.
Peri-Rx with Caffeine contains:
- extremely effective ingredients: 1
- moderately effective ingredients: 7
- total ingredients: 8
The following table lists all ingredients found in this product as well as their effectiveness ratings and amounts (if listed).
|Sodium 800mg||3 out of 3|
|Creatine Monohydrate 2.5g||2 out of 3|
|Beta Alanine 3.2g||2 out of 3|
|HMB 1.5g||2 out of 3|
|Caffeine 300mg||2 out of 3|
|Branched Chain Amino Acids 8g||1.9 out of 3|
|Citrulline Malate 4g||1.6 out of 3|
|Betaine 1g||1.6 out of 3|
|Product Effectiveness Rating||2.01|
Cycling creatine on and off is unnecessary. There is no good research indicating that long term crea...read more
Peri-Rx with Caffeine earned a thumbs up in this category because 80% of its ingredients are dosed within the effective range. Seventy-five (75)% of product's ingredients must be dosed within the effective range to receive a thumbs-up in this area.
This category compares a product's ingredient dosing to effective doses found in research articles and doses used in other products. When researchers study the efficacy of supplement ingredients, they use specific doses. Manufacturers should create products with ingredient doses that fall within established effective ranges.
Peri-Rx with Caffeine Dosing Compared to Research
This section is a comparison of ingredient doses found in Peri-Rx with Caffeine to amounts used in research articles. The first column contains the name of the ingredient as well as the amount. The second column contains the range of effective doses for that ingredient. Note: not all ingredients in the database contain dosing information; only ingredients with scientific dosing information are included in this analysis.
A green checkmark is shown if the ingredient amount falls within the effective range.
A down arrow is shown if an ingredient amount is lower than the effective range.
|Ingredient & Amount||Effective Range|
|Branched Chain Amino Acids 8g||1.22g - 29.2g|
|Creatine Monohydrate 2.5g||2g - 30g|
|Beta Alanine 3.2g||2.4g - 6g|
|Citrulline Malate 4g||8g|
|HMB 1.5g||1.5g - 3.42g|
Peri-Rx with Caffeine Dosing Compared to Other Products
This section is a comparison of ingredient doses found in Peri-Rx with Caffeine to amounts used in other products. The first column displays the ingredient and amount. The second column displays the average amount of the ingredient found across all products in the database. The final column displays the range found across all products in the database.
A orange up or down arrow is shown if the ingredient amount is higher or lower than the average.
An equal sign is shown if the ingredient amount is equal to the average.
|Ingredient & Amount||Average||Range|
|Branched Chain Amino Acids 8g||4.45g||0g - 10.5g|
|Creatine Monohydrate 2.5g||2.96g||0.75g - 5g|
|Beta Alanine 3.2g||2.38g||0g - 6.4g|
|Citrulline Malate 4g||4.59g||0.08g - 10g|
|HMB 1.5g||1.45g||0.5g - 3g|
|Betaine 1g||1.79g||0.1g - 5g|
|Sodium 0.8g||0.13g||0.01g - 2g|
|Caffeine 300mg||239.79mg||3mg - 700mg|
Peri-Rx with Caffeine earned a thumbs-up in this category because 81% of its claims are rated as either extremely or moderately effective. Seventy-five (75)% of a product's claims must be rated as extremely or moderately effective to receive a thumbs-up in this area.
The product’s effectiveness rating is an overall picture of how well a product does or doesn't work. Individual studies research an ingredient's effects on certain claims. For example: does creatine monohydrate increase strength, or does beta alanine improve running performance?
The Supplement Database compiles the conclusions of these studies, and based on a product's ingredient makeup, calculates how well a product does on various claims. The claims below are organized by effectiveness (extremely, moderately, ineffective).
Peri-Rx with Caffeine is extremely effective at:
Peri-Rx with Caffeine is moderately effective at:
- increase protein synthesis
- improve cognitive ability
- improve cycling performance
- improve sprint performance
- decrease protein breakdown
- improve cardiovascular endurance
- increase muscle mass
- increase levels of growth hormone
- improve sports performance
- improve running performance
- decrease body fat
- increase strength
- improve rowing performance
- improve cycling sprint performance
- improve muscular endurance
- decrease fatigue
- reduce muscle damage
- improve recovery
- reduce muscle soreness
- improve mood
- improve memory
Peri-Rx with Caffeine earned a thumbs-up in this category because its research rating is 67.625. A product's research rating must be at least 60 to receive a thumbs-up in this area.
A research rating of 67.625 means there is a moderate amount of research on this product's ingredients to ensure the effectiveness rating is probably valid.
The research rating is a measure of how much research has been conducted on a product's ingredient makeup. Manufacturers often rely on ingredients without adequate research backing. They may do this to compete with other products that are already using poorly researched ingredients. They may also only use a very small amount of cherry-picked research as a poor justification to use certain ingredients.
The amount of research contained in the database on a product's ingredients determines its research rating. Products with higher ratings are made up of thoroughly researched ingredients.
Peri-Rx with Caffeine earned a thumbs-up in this category because its discloses 100% of its ingredient amounts. A product must disclose all ingredient amounts to receive a thumbs-up in this area.
Nutrition label transparency refers to how many ingredients are listed with amounts on the product label. Many supplement manufacturers hide ingredient amounts under the guise of great-sounding proprietary blends such as "Maximum Muscular Size Enhancer" or "Anabolic Cell Strength Matrix."
When manufacturers use proprietary blends, they can hide ingredient amounts making it difficult for consumers to know whether a product is effective.
Peri-Rx with Caffeine contains:
- total ingredients: 8
- ingredients with amounts listed: 8
- ingredients without amounts listed: 0
- percent of ingredient amounts disclosed: 100%
The label below was generated from the information contained in the database about the product's ingredients and amounts. Actual product labels may differ in appearance.
Peri-Rx with Caffeine earned a thumbs-up in this category because it ranks 1 out of 601 in the category (top third). A product must be ranked in the top two-thirds of its category to receive a thumbs-up in this area.
Peri-Rx with Caffeine ranks 1 out of 601 in the Pre-Workout Supplements category and 2 out of 1572 in the entire database. The table below lists comparisons with similarly ranked . Click on a link for an in-depth comparison between the two.
|Peri-Rx with Caffeine vs Tier 1 Plus|
|Peri-Rx with Caffeine vs Tier 1|
Peri-Rx with Caffeine vs Other Barbell Medicine Pre-Workout Supplements
Manufacturers often create multiple products within the same category. These products are sometimes similar but marketed to different consumers with varying prices. The following table allows you to compare Peri-Rx with Caffeine against its sister products; products manufactured by Barbell Medicine within the pre-workout supplements category.
|Peri-Rx with Caffeine vs Peri-Rx|
See more comparisons: Is Peri-Rx with Caffeine the best pre-workout supplement?
|Effectiveness Rating||rating is greater or equal to the required 1.5|
|Ingredients||more than 75% of ingredients are rated as effective|
|Ingredient Dosing||more than 75% of ingredients are dosed properly|
|Claims||more than 75% of claims are rated as effective|
|Research Rating||research rating is greater or equal to the required 60|
|Nutrition Label Transparency||discloses all ingredient amounts on label|
|Ranking Within Category||ranks in the top two thirds of category|
|Overall Recommendation||received a thumbs up in the majority of areas|