Product Description
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.
- Gluten free
- Sport Tested: NSF Certified for Sport®
- 24g
- 1g
- 110mg
- 2g
Nutrition Facts
20 Servings / Vanilla Custard
Serving Size: 1 Scoop
Serving Per Container: 20
| Amount Per Serving | ||
|---|---|---|
| Calories | 110 | |
| % Daily Value* | ||
| Cholesterol 20mg | 7% | |
| Sodium 110mg | 5% | |
| Total Carbohydrate 2g | 1% | |
| Sugars 1g | ** | |
| Protein 24g | 48% | |
| Calcium 530mg | ** | |
* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
** Daily Value (DV) not established
Always Happy Promise: Don't like a product? Tell us within 30 days of receipt and we'll make it right and make you happy. Here at The Feed, we want you to love your experience and the sports nutrition products you purchase. If, for any reason, you are not satisfied with your nutrition specific purchase, tell us.
We do not accept returns on food items that have been opened, but we will issue a store credit if you are unsatisfied. In the event of a return, you must first contact us before sending back a return shipment.
Consumable products over $40 receive a 50% store credit. This includes specialty nutrition products such as ketones or supplements/vitamins.
Klean Athlete Casein FAQ's
Everything you need to know about Klean Athlete Casein.
Klean Casein Protein is a slow-digesting micellar casein protein powder delivering 24g of protein per scoop, designed specifically for overnight recovery and reducing muscle breakdown while you sleep. It's NSF Certified for Sport and available in Natural Chocolate flavor.
Micellar casein is the slow-digesting form of dairy protein that releases amino acids gradually over several hours rather than all at once — making it the optimal protein source for overnight muscle repair when your body does most of its rebuilding. Whey is fast and great post-workout; casein is slow and built for the long overnight window.
Before bed is the sweet spot — one scoop mixed with 10 to 12 ounces of water or milk 30 to 60 minutes before sleep gives your muscles a steady supply of amino acids throughout the night. It can also be used during long gaps between meals when you need sustained protein release.
Yes. Like all Klean Athlete products, Klean Casein is NSF Certified for Sport — independently tested for banned substances, label accuracy, and contaminants. For competitive athletes subject to drug testing, that certification is non-negotiable.
Whey absorbs quickly — ideal immediately post-workout. Casein absorbs slowly over four to seven hours — ideal overnight or during long gaps between meals. Most serious endurance and strength athletes benefit from using both strategically rather than choosing one over the other.