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💪 Fuel your grind with the smoothest, cleanest sustained-release protein blend!
Syntrax Nutrition Matrix is a 5 lb sustained-release protein blend featuring rBST-free, grass-fed whey, micellar casein, and egg white protein. Designed for steady amino acid delivery, it supports muscle recovery and growth with 23g of premium protein per serving. This ultra-instantized milk chocolate formula mixes smoothly with just a spoon, offering 73 servings of clean, hormone-free nutrition perfect for pre-, during, or post-workout fueling.












| Asin | B09Y2C33YM |
| Best Sellers Rank | #183 in Sports Nutrition Whey Protein Powders |
| Date First Available | April 15, 2022 |
| Item Model Number | SM5MC |
| Manufacturer | Si03, Inc. |
| Product Dimensions | 9 x 6 x 14 inches; 5 pounds |
User
High Quality, Good Taste, Easy Mix
Top quality
User
Love the taste!
Great taste! My go to for many years now. New packaging design. I’m a milk chocolate fan. I put some ice cubes in, water, half a scoop of protein, and half a banana to start my day. I finish it quickly!
User
Good just mix it up good
I like the macros and the taste is good not very chemically . You do have to mix pretty aggressively so don’t expect to use a spoon . Texture is fine when mixed properly.
User
Matrix Milk Chocolate for the win!
If you live chocolate this is your protein! I have been using this brand for 10 years because it is creamy and not overly sweet like Premier Protein Shakes. I use unsweetened almond milk and mix several days worth at a time before I go to bed. I do this because for it to be creamy I let it sit overnight, if you mix and drink immediately it can be a little grainy. I have tried other brands over the years and go back to this one every time.
User
Solid Chocolate Protein with Good Mixability, but Not Their Best Flavor
I’ve tried a lot of protein powders, and this item ranks in my upper tier overall. It mixes well without much effort and doesn’t have the clumping issues or chalky texture that some blends do.The milk chocolate flavor is decent and easy to drink, but not exceptional. Compared to Syntrax’s Chocolate Supreme, this one falls a bit short in richness and overall taste. If both are available, I would always choose Chocolate Supreme instead.Nutritionally, it performs as expected for a sustained-release blend, and it provides a good level of satiety. No surprises there.Overall, this is a reliable, high-quality protein powder with good mixability and solid performance, but the flavor keeps it just below the top spot.
User
Love it
Great
User
Yummy
Great taste
User
Protein powder mixes completely!
I buy this consistently and have for years. It mixes completely in my morning coffee with no gritty residue ( if the mixer/frother is powerful enough).
Trustpilot
3 weeks ago
1 week ago