Klean Athlete Casein

Your body doesn't stop working when you stop training. While you sleep, your muscles are rebuilding — but only if they have the raw materials to do it. Many athletes nail their post-workout nutrition, but then leave the overnight window completely unaddressed. That's eight hours of recovery left on the table every single night where casein can help.

Klean Athlete Casein Protein delivers 24 grams of slow-digesting micellar casein — protein that feeds your muscles for hours, not minutes, while you sleep.

Slow-Release Muscle Fuel – Micellar casein is protein in its natural milk form. It forms a slow-digesting gel in your stomach that releases amino acids steadily over 5–7 hours — keeping your muscles in a growth and repair state all night long, instead of going catabolic.

Built-In Electrolyte Support – Every serving delivers naturally occurring calcium (530 mg), potassium (250 mg), and sodium (110 mg) — the minerals that keep muscles firing and support hydration recovery after hard training days.

NSF Certified for Sport – Every batch is third-party tested and certified by NSF — the same standard used by professional sports leagues and Olympic programs. If you're competing at any level, this is the standard that matters.

How to Use Klean Athlete Casein Protein

Dose: Take one scoop (approximately 33g) mixed with 10–12 oz of water, milk, or your preferred beverage. For best results, consume 30–60 minutes before bed on training days. On recovery days, use it as a high-protein snack between meals to maintain steady amino acid availability throughout the day.

Pro tip: Mix with a little less liquid for a thicker, pudding-like texture. It's a better bedtime snack than anything in your pantry.

Endurance athletes, cyclists, and triathletes training double days or high-volume blocks rely on overnight protein to protect the muscle they've worked hard to build. With just 110 calories, less than 1g of sugar, and 24g of clean micellar casein per serving, Klean Casein fits seamlessly into your recovery nutrition without adding unnecessary calories before bed.