---
product_id: 58997194
title: "Barbell Medicine, Peri-Rx Post & Pre-Workout Powder, BCAA, Creatine Monohydrate, Beta Alanine, Citrulline Malate, HMB, Betaine Anhydrous, Caffeine Free, Sour Gummy Flavor, 687g"
brand: "gainzzz rx"
price: "$1810"
currency: MXN
in_stock: false
reviews_count: 7
url: https://www.desertcart.mx/products/58997194-barbell-medicine-peri-rx-post-and-pre-workout-powder-bcaa
store_origin: MX
region: Mexico
---

# 3.2g Beta Alanine boosts endurance 2.5g Creatine + 1g Betaine for hydration 8g BCAA 2:1:1 ratio Barbell Medicine, Peri-Rx Post & Pre-Workout Powder, BCAA, Creatine Monohydrate, Beta Alanine, Citrulline Malate, HMB, Betaine Anhydrous, Caffeine Free, Sour Gummy Flavor, 687g

**Brand:** gainzzz rx
**Price:** $1810
**Availability:** ❌ Out of Stock

## Summary

> 🔥 Science-Backed Gains, No Compromise 💥

## Quick Answers

- **What is this?** Barbell Medicine, Peri-Rx Post & Pre-Workout Powder, BCAA, Creatine Monohydrate, Beta Alanine, Citrulline Malate, HMB, Betaine Anhydrous, Caffeine Free, Sour Gummy Flavor, 687g by gainzzz rx
- **How much does it cost?** $1810 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/58997194-barbell-medicine-peri-rx-post-and-pre-workout-powder-bcaa)

## Best For

- gainzzz rx enthusiasts

## Why This Product

- Trusted gainzzz rx brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Value-Packed Convenience:** All-in-one formula saves you $0.34+ per serving and simplifies your supplement stack.
- • **Caffeine-Free Flexibility:** No stimulants means you control your caffeine intake and avoid workout jitters anytime.
- • **Synergistic Hydration Boost:** Creatine Monohydrate paired with Betaine Anhydrous optimizes cellular hydration and recovery.
- • **Clinically Dosed Muscle Fuel:** 8g BCAAs and 4g Citrulline Malate to maximize muscle protein synthesis pre & post workout.
- • **Endurance & Volume Amplifier:** 3.2g Beta Alanine enhances work capacity so you push harder, longer.

## Overview

Barbell Medicine Peri-Rx is a GMP-certified, research-driven pre & post workout powder featuring clinically effective doses of BCAAs, creatine, beta alanine, and recovery enhancers. Designed by Dr. Jordan Feigenbaum, it delivers muscle growth, endurance, and hydration support without caffeine, offering a convenient, cost-effective solution for serious lifters seeking clean, flexible supplementation.

## Description

This product was designed by Dr. Jordan Feigenbaum to his specifications and is GMP certified so you know that you’re getting what is on the label. What’s in it? (Now reformulated) 30 Servings of:- 8 grams of muscle-building Branched Chain Amino Acids (BCAA’s) in a 2:1:1 ratio (Leucine:Isoleucine:Valine) - 2.5 grams of Creatine Monohydrate - 3.2 grams beta alanine for increased work capacity and volume tolerance - 4 grams of Citrulline Malate to enhance muscle protein synthesis - 1.5 grams of HMB for improved recovery - 1000mg of Betaine Anhydrous to complement creatine’s effect on increasing cellular hydration and ultimately, may benefit performance and recovery - 800mg sodium to maintain electrolyte balance When do I take it? Take it directly pre and post workout, i.e. 1 scoop pre workout and 1 scoop post workout It’s $1.66 per serving compared to if you were to purchase all the preworkout supplements separately, you’d spend over $2.00 per serving. Plus it's already mixed & to quickly drink preworkout or postworkout. Why bother spending time mixing different products together? Easy and Travel Friendly. Why is there no caffeine? Caffeine is a great potential performance aid, if it’s indicated! I purposely left it out because the beneficial dose is different for everyone based on their weight, caffeine tolerance, and what kind of workout you’re doing. The beneficial dose is about 3-9 milligrams per kilogram body weight, so you can see that wide range in dosing in and of itself would be a deal breaker when designing a supplement. Additionally, since this designed to be taken before AND after a workout, caffeine after the workout may not be the best idea. Finally, using stimulant each and every workout is likely to increase the total fatigue of the workout, which is a variable that needs to be adjusted based on the athlete’s needs.

Review: The Best There Is! - This is what you need - clinically effective doses of scientifically proven ingredients. No “secret formulas” and made-up names, this contains only legit, quality ingredients meant to enhance and support muscle growth and recovery. I was also surprised and am happy to report that it’s the best tasting pre/post workout I’ve ever had (sour gummy, which is not really sour, if you are concerned about that). Mixes incredibly well, quickly. I recommend getting the no caffeine version, so you can use this any time of day, pre and post workout, without worrying about caffeine intake. Just grab some cheap caffeine from bulk supplements and use it at your discretion. The Barbell Medicine crew actually care about people, they aren’t in this for the money. You can believe in the integrity of their products. I encourage everyone to check out their website or YouTube channel, where you can easily verify this for yourself.
Review: The formula change ultimately lead me to look elsewhere. - I'm writing this review after having been a PeriRX consumer for over a year. TLDR is the change in formula affected the taste and mix-ability enough that I investigated other products and decided to try something else. I used PeriRX because I have a lot of faith in the company and I saw it as a great way to give back to a company that produces a lot of good, free content. I never did any "controlled" studies to see if the effects are different for me. Honestly, there's too many variables to make it worthwhile. I really take a pre-workout because a) it sets the stage that I am going to work out and b) I like the heightened feeling I get when taking a pre-workout. In both formulas, I really enjoy that I can mix it with a lot of water, and it doesn't taste watered down. However, the newest formula had an off-putting taste and tended to froth, which isn't ideal. At the end of the day, placebo of taking and enjoying a pre-workout gives me a lot of benefit and this started to wane for me. As this occurred, I started to do research the supplements to see which ones I really enjoyed or didn't. The thing that sticks out to me is the inclusion of BCAA's/EAA's in the formula. The research suggests that there’s not much of an affect for people who eat enough protein and they are probably about a third to half the cost of the entire supplement. I also, did not prefer to take one scoop before and after, but that could easily be eliminated by taking it all before. I also don’t like having to purchase an additional creatine supplement to take on off days. All this being said, I still don’t’ doubt this is one of the best pre-workouts on the market, I just found something that fit me a bit better for now.

## Features

- Perfectly Dosed & GMP Certified = (Minimally Processed) 8g BCAA to Drive Muscle Protein Synthesis - Provided in a 2:1:1 ratio + 4g Citrulline Malate to further enhance Muscle Protein Synthesis
- Research Based Ingredients: 3.2g Beta Alanine for Increased Work Capacity and Volume Tolerance + 1.5g HMB for Improved recovery + 800mg Sodium to Maintain Electrolyte Balance
- Research Based Ingredients: 2.5g Creatine Monohydrate + 1000mg Betaine Anhydrous to Synergize Ceatine’s Effect on Increasing Cellular Hydration & Ultimately, May benefit Performance and Recovery
- Combine & Save: Estimated to be $1.66 per serving compared to taking the same supplements separately, you’d spend over $2.00 per serving. Taken Pre & Post Workout, 3x / Week, Provides Enough Servings for 1 Month
- Developed by Dr. Jordan Feigenbaum, MD, MS - Strength Coach, Doctor & Elite Powerlifter - Using Science Backed Research, he has proven methods for muscle gain. His Personal Best? Squat 640 (raw w/wraps), Bench 430, Deadlift 725 @ 198lbs

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B079H4679G |
| Customer Reviews | 4.4 4.4 out of 5 stars (59) |
| Date First Available  | February 27, 2017 |
| Is Discontinued By Manufacturer  | No |
| Manufacturer  | Barbell Medicine |
| Package Dimensions  | 7.44 x 5.04 x 4.96 inches; 1.87 Pounds |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** GainzZz Rx
- **Dosage Form:** Powder
- **Flavor:** Sour Gummy
- **Item Form:** Powder
- **Item Weight:** 0.85 Kilograms
- **Number of Items:** 1
- **Product Benefits:** Hydration
- **Servings per Container:** 30
- **Unit Count:** 24.23 Ounce

## Images

![Barbell Medicine, Peri-Rx Post & Pre-Workout Powder, BCAA, Creatine Monohydrate, Beta Alanine, Citrulline Malate, HMB, Betaine Anhydrous, Caffeine Free, Sour Gummy Flavor, 687g - Image 1](https://m.media-amazon.com/images/I/51AQJsea07L.jpg)
![Barbell Medicine, Peri-Rx Post & Pre-Workout Powder, BCAA, Creatine Monohydrate, Beta Alanine, Citrulline Malate, HMB, Betaine Anhydrous, Caffeine Free, Sour Gummy Flavor, 687g - Image 2](https://m.media-amazon.com/images/I/612A2djzXGL.jpg)
![Barbell Medicine, Peri-Rx Post & Pre-Workout Powder, BCAA, Creatine Monohydrate, Beta Alanine, Citrulline Malate, HMB, Betaine Anhydrous, Caffeine Free, Sour Gummy Flavor, 687g - Image 3](https://m.media-amazon.com/images/I/61xnTtlyVFL.jpg)
![Barbell Medicine, Peri-Rx Post & Pre-Workout Powder, BCAA, Creatine Monohydrate, Beta Alanine, Citrulline Malate, HMB, Betaine Anhydrous, Caffeine Free, Sour Gummy Flavor, 687g - Image 4](https://m.media-amazon.com/images/I/71GQeemT7JL.jpg)
![Barbell Medicine, Peri-Rx Post & Pre-Workout Powder, BCAA, Creatine Monohydrate, Beta Alanine, Citrulline Malate, HMB, Betaine Anhydrous, Caffeine Free, Sour Gummy Flavor, 687g - Image 5](https://m.media-amazon.com/images/I/71ZzWKmwwPL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ The Best There Is!
*by D***W on May 27, 2018*

This is what you need - clinically effective doses of scientifically proven ingredients. No “secret formulas” and made-up names, this contains only legit, quality ingredients meant to enhance and support muscle growth and recovery. I was also surprised and am happy to report that it’s the best tasting pre/post workout I’ve ever had (sour gummy, which is not really sour, if you are concerned about that). Mixes incredibly well, quickly. I recommend getting the no caffeine version, so you can use this any time of day, pre and post workout, without worrying about caffeine intake. Just grab some cheap caffeine from bulk supplements and use it at your discretion. The Barbell Medicine crew actually care about people, they aren’t in this for the money. You can believe in the integrity of their products. I encourage everyone to check out their website or YouTube channel, where you can easily verify this for yourself.

### ⭐⭐⭐⭐ The formula change ultimately lead me to look elsewhere.
*by M***R on June 30, 2020*

I'm writing this review after having been a PeriRX consumer for over a year. TLDR is the change in formula affected the taste and mix-ability enough that I investigated other products and decided to try something else. I used PeriRX because I have a lot of faith in the company and I saw it as a great way to give back to a company that produces a lot of good, free content. I never did any "controlled" studies to see if the effects are different for me. Honestly, there's too many variables to make it worthwhile. I really take a pre-workout because a) it sets the stage that I am going to work out and b) I like the heightened feeling I get when taking a pre-workout. In both formulas, I really enjoy that I can mix it with a lot of water, and it doesn't taste watered down. However, the newest formula had an off-putting taste and tended to froth, which isn't ideal. At the end of the day, placebo of taking and enjoying a pre-workout gives me a lot of benefit and this started to wane for me. As this occurred, I started to do research the supplements to see which ones I really enjoyed or didn't. The thing that sticks out to me is the inclusion of BCAA's/EAA's in the formula. The research suggests that there’s not much of an affect for people who eat enough protein and they are probably about a third to half the cost of the entire supplement. I also, did not prefer to take one scoop before and after, but that could easily be eliminated by taking it all before. I also don’t like having to purchase an additional creatine supplement to take on off days. All this being said, I still don’t’ doubt this is one of the best pre-workouts on the market, I just found something that fit me a bit better for now.

### ⭐⭐⭐⭐⭐ No BS ingredients, actually helps with recovery
*by S***R on December 30, 2019*

This is a great product, no BS ingredients and it REALLY does help with recovery and DOMS if taken it as directed. I was initially only taking this as a pre and intra workout, but I started adding a half to full scoop in with my protein after heavy days and that is when I noticed the recovery aspect the most. I love that the ingredient list is comparatively small and strictly purpose-driven by only including compounds backed by peer reviewed scientific literature and nothing else. Everything is clearly labeled with no “proprietary blends” that obfuscate content information. This is hard to find in the supplement industry and I respect barbell medicine for taking this approach. I really appreciate the caffeine-free aspect as I do most of my lifting in the evening so I want to avoid the mega dose of caffeine and mystery herbals that are oh so common in almost every other intra-workout type supplement. If I need caffeine i’ll just supplement with coffee. Overall this just provides way more flexibility. Flavor was a little wonky on older batches but its gotten better. Its perfectly fine, but i’m not picky. Overall great product!

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*Product available on Desertcart Mexico*
*Store origin: MX*
*Last updated: 2026-03-04*