You finish your last workout of the day, down your whey shake, hit the shower, and then think you're good.

For the next 8 hours, your muscles are craving something while you sleep. Most athletes nail their post-workout nutrition but completely overlook their overnight recovery window—the longest stretch your body goes without protein.

Promix Casein Protein Powder turns your sleep into an active recovery session. This grass-fed micellar casein delivers a slow, steady stream of amino acids for 6-8 hours, keeping your muscles fed all night long.

The Protein That Works While You Sleep

Slow-Release Protein – Unlike whey that digests in 90 minutes, casein forms a gel in your stomach that releases amino acids gradually over 6-8 hours. Think of it like a nutrition IV drip—but simpler.

Grass-Fed Purity, Nothing Else – Sourced from pasture-raised cows, every batch delivers 25g of complete micellar casein protein with the full spectrum of alpha, beta, and kappa-casein proteins. No hormones, no antibiotics, no GMOs. Just cold-processed protein that stays clean through every filtration step.

Three Flavors, Same Clean Formula – Choose Chocolate or Vanilla for a rich shake, or grab Unflavored to mix into anything. Each flavor keeps it simple—under 5 ingredients, zero artificial sweeteners, zero gums or fillers.

The science is straightforward: micellar casein contains all nine essential amino acids including 5.3g of BCAAs and over 2g of leucine per serving. These are the building blocks your muscles need to repair tissue damage and build new muscle—especially during extended fasting periods like sleep.

Ingredients forPromix Casein Protein Powder(Unflavored / 2.5 lb Bag):Micellar Casein, Sunflower Lecithin.