--- product_id: 16803705 title: "Syntrax Matrix Peanut Butter Cookie 5 lb Sustained‑Release Protein Blend" brand: "syntrax" price: "€ 175.39" currency: EUR in_stock: true reviews_count: 8 url: https://www.desertcart.pt/products/16803705-syntrax-matrix-peanut-butter-cookie-5-lb-sustained-release-protein store_origin: PT region: Portugal --- # slow-digesting micellar casein 26g sustained-release protein blend rich peanut butter cookie flavor Syntrax Matrix Peanut Butter Cookie 5 lb Sustained‑Release Protein Blend **Brand:** syntrax **Price:** € 175.39 **Availability:** ✅ In Stock ## Summary > 🥜 Fuel your hustle with peanut butter-powered protein perfection! ## Quick Answers - **What is this?** Syntrax Matrix Peanut Butter Cookie 5 lb Sustained‑Release Protein Blend by syntrax - **How much does it cost?** € 175.39 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/16803705-syntrax-matrix-peanut-butter-cookie-5-lb-sustained-release-protein) ## Best For - syntrax enthusiasts ## Why This Product - Trusted syntrax brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smooth Mixability:** Dissolves effortlessly in any beverage—no clumps, just creamy perfection - • **Bulk Size, Big Gains:** 5-pound supply designed for consistent performance and long-term results - • **All-Day Protein Power:** Blend of undenatured whey, micellar casein & egg albumin fuels muscles around the clock - • **Versatile Anytime Fuel:** Ideal for pre-workout, post-workout, or a midday boost to keep you sharp - • **Flavor That Works as Hard as You Do:** Indulgent peanut butter cookie taste satisfies cravings without the guilt ## Overview Syntrax Matrix Peanut Butter Cookie is a 5-pound sustained-release protein blend combining undenatured whey, micellar casein, and egg albumin. Designed for all-day muscle support, it dissolves smoothly in beverages and delivers a rich peanut butter cookie flavor, making it an ideal protein source anytime. ## Description Syntrax Matrix Whey Protein, Peanut Butter Cookie, 5 Pound ## Features - Contains undenatured whey protein, micellar casein and egg albumin - Ideal protein source for any time of the day - Dissolves perfectly in your favorite beverage ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B00KWL03UY | | Date First Available | July 12, 2013 | | Item Model Number | SY-MA-229-08 | | Manufacturer | Syntrax | | Product Dimensions | 9 x 6 x 14 inches; 5 pounds | ## Product Details - **Brand:** Syntrax - **Flavor:** Peanut Butter - **Item Weight:** 5.2 Pounds - **Unit Count:** 480.0 Ounce - **Number of Items:** 1 ## Images ![Syntrax Matrix Peanut Butter Cookie 5 lb Sustained‑Release Protein Blend - Image 1](https://m.media-amazon.com/images/I/71VhWUIURzL.jpg) ![Syntrax Matrix Peanut Butter Cookie 5 lb Sustained‑Release Protein Blend - Image 2](https://m.media-amazon.com/images/I/61rCnm5uP3L.jpg) ![Syntrax Matrix Peanut Butter Cookie 5 lb Sustained‑Release Protein Blend - Image 3](https://m.media-amazon.com/images/I/81qcLqWG60L.jpg) ![Syntrax Matrix Peanut Butter Cookie 5 lb Sustained‑Release Protein Blend - Image 4](https://m.media-amazon.com/images/I/71BbB+4MhpL.jpg) ![Syntrax Matrix Peanut Butter Cookie 5 lb Sustained‑Release Protein Blend - Image 5](https://m.media-amazon.com/images/I/61Hne2XAwWL.jpg) ## Available Options This product comes in different **Flavor Name** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Best value, best price, and it has everything I need/want from a protein supplement *by on Reviewed in the United States June 15, 2016* This was recommended to me by a local nutrition store (NOT a chain store btw). I have been ordering this continuously for the past couple years and have no reason to change to a different product. It includes all the BCAAs you need, as well as a few additional Amino Acids. It contains multiple types of protein, fast acting and slow acting proteins (so your body gets what it needs right away, but also over a longer time). It also has only 3g of sugar (per scoop)!! I'm not sure how, but it tastes amazing as well. AND the value for the price is off the charts (from what I've found so far). This, for me, is an easy pick, I don't need any other protein supplements.The other reviews are correct about the ziplock. Protein can get stuck in the grooves, which needs to be cleaned out before trying to zip close. I solve this problem by using old protein twist-top containers and filling them with the the contents of the bag. I keep one at work and one at home. ### ⭐⭐⭐⭐⭐ A dream come true. *by on Reviewed in the United States September 21, 2013* I've been a fan of Syntrax Matrix since I first tried it. It's definitely the best tasting protein around. The only thing that could make it better, I thought, was if they added some other more interesting flavors such as peanut butter or mocha.Well, they did, and it's everything I hoped for...It basically tastes like drinking a peanut butter cookie, especially if you mix it thick. I actually like when it doesn't mix all the way, because the grittiness enhances the similarity to cookies.One major downside is that at 150 calories per 24 grams of protein, this powder has relatively high calories compared to most protein powders. I'd say it's worth it unless you're on a very strict diet in which case you should go with their banana or vanilla flavor.Surprisingly fast shipping too. ### ⭐⭐⭐⭐⭐ Best Protein/#1Choice...**price change** *by on Reviewed in the United States February 12, 2016* This protein taste just like how it says. Awesome Protein, amazing for the price. I have been working out since 2011 and this protein is by far the best/$$ and per Aminos as well. 100g roughly 2.5 scoops delivers 10 grams of glutamine! :O I ordered 1 and just ordered 2 more! The taste is 9/10 and sometimes clumps up if not shaken properly but it's amazing and I highly suggest it for all lifters/bodybuilders/fitness people.But I have a question, why did the price go up over 20%? One of the reasons why this protein was good was the protein gram/$$$ made it very special and unique. I'll continue to buy if price changes, if it stays then I am not sure if I'll be able to continue my orders. ## Frequently Bought Together - Syntrax Matrix Whey Protein, Peanut Butter Cookie, 5 Pound - Syntrax Nutrition Matrix Protein Powder, Sustained-Release Protein Blend, Perfect Chocolate, 5 lbs --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/16803705-syntrax-matrix-peanut-butter-cookie-5-lb-sustained-release-protein](https://www.desertcart.pt/products/16803705-syntrax-matrix-peanut-butter-cookie-5-lb-sustained-release-protein) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-09-20*