Muscle Milk Pro Series – NSF Certified for Sport Protein Powder for Tested Athlete Safety
Muscle Milk Pro Series – NSF Certified for Sport Protein Powder for Tested Athlete Safety
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Why you'll love it
- NSF Certified for Sport gives competitive athletes confidence the product is free of 270+ banned substances
- 50g of protein per serving is among the highest in the category, supporting serious muscle building
- Only 3g of sugar delivers a high protein load without the sugary taste or calorie bloat of competitors
- Blend of fast- and slow-releasing proteins provides both immediate and sustained amino acid delivery
- Multiple flavors (Chocolate, Vanilla, Strawberry) and sizes (2 lb and 5 lb) let users tailor to taste and commitment level
- Included 20 vitamins and minerals turn a simple shake into a more complete nutritional shake
Perfect for
- Post-workout recovery shake within 30 minutes of training
- High-protein breakfast or meal replacement for busy mornings
- Quick protein boost added to coffee, smoothies, or oatmeal
- Sustained amino acid delivery between meals to support muscle protein synthesis
- Competition-prep nutrition for tested athletes



Product Information
Contains one (1) 5 pound cannister (about 28 servings) of Muscle Milk Pro Series Protein Powder Supplement. Packaging may vary. Shaker bottle sold separately.
HELPS SATISFY HUNGER AND BUILD MUSCLE plus plus – Muscle Milk Pro Series supplies your body with high quality protein to support post-workout recovery and muscle growth and maintenance. plus plus Try taking it to-go in a shaker bottle for energizing on-the-go nutrition.
KEY FEATURES – Based on 1 serving, Muscle Milk Pro Series Protein Powder contains 50g high-quality protein, 3g sugar, and an excellent source of 20 vitamins and minerals.
VERSATILE AND EASY-TO-MIX – Muscle Milk Pro Series dissolves easily in water; just mix 2 scoops into 10-16 fluid ounces of water using a shaker bottle. Shaker bottle sold separately. plus plus
SCIENCE BEHIND PROTEIN – Muscle Milk Pro Series provides a blend of high-quality slow releasing and fast releasing proteins to help increase amino acid levels. These essential amino acids play a role in muscle growth and maintenance of muscle mass. plus plus
TESTED FOR BANNED SUBSTANCES – Muscle Milk Protein Powders are NSF Certified for Sport. NSF screens for more than 270 substances banned by most major athletic organizations.
Muscle Milk Pro Series Protein Powder Supplement, Knockout Chocolate, 5 Pound, 28 Servings, 50g Protein, 3g Sugar, 20 Vitamins & Minerals, NSF Certified for Sport, Workout Recovery, Packaging May Vary
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Muscle Milk Pro Advanced Nutrition is an energizing protein shake that can be consumed to support post-workout recovery and muscle growth or as an on-the-go breakfast or anytime snack. It contains a combination of slow releasing and fast releasing proteins to help increase amino acid levels. These essential amino acids play a role in muscle growth. Also try adding your protein shake to coffee, smoothies or even oatmeal when you’re looking for a protein boost.
Ingredients
Milk protein isolate, maltodextrin, sodium caseinate, alkalized cocoa powder, whey protein concentrate, non dairy creamer (sunflower oil, maltodextrin, sodium caseinate [milk derivative], mono-and diglycerides, tocopherols), natural and artificial flavors, resistant maltodextrin (Fibersol-2), potassium chloride, medium chain triglycerides, whey protein isolate, canola oil, magnesium oxide, potassium bicarbonate, acesulfame potassium, lactoferrin, sucralose, whey protein hydrolysate.
Features & Specs
Product Benefits: Muscle Growth
Protein Source: Blend
Frequently Asked Questions
Is this protein powder safe for tested athletes who face drug screening?
Yes. Muscle Milk Pro Series is NSF Certified for Sport, which means it is third-party tested for more than 270 substances banned by major athletic organizations, giving competitive athletes confidence in what they are consuming.
Does the NSF Certified for Sport label mean it is actually tested, not just claimed?
NSF independently tests each lot of product for banned substances and contaminants, and the certification is widely recognized by organizations such as the NFL, MLB, NHL, PGA, and CFL.
Is this a safe choice for a home gym where my family is around?
The product is a powdered supplement intended to be mixed into a shake, with no open flame, sharp edges, or hazardous components, making it a safe addition to a household gym environment.
Are the sweeteners used in this protein safe for regular consumption?
The formula uses acesulfame potassium and sucralose at levels consistent with regulatory guidelines, keeping total sugar at just 3g per serving while maintaining taste.
Can I trust the ingredient label and protein content stated on the canister?
NSF Certified for Sport verification includes label claim review and contaminant testing, so the 50g protein content and other listed ingredients have been independently confirmed.
I'm a competitive athlete — is this product actually safe to use during competition prep?
Yes. The NSF Certified for Sport certification is specifically designed for athletes subject to testing, and the product is commonly chosen by competitors across strength and endurance sports.
How does this compare to a cheaper protein that does not have sport certification?
Uncertified proteins may not be tested for banned substances or contaminants. NSF Certified for Sport products are independently screened for over 270 banned substances, providing a level of accountability uncertified brands do not offer.
Is this safer than a high-stim pre-workout for athletes who get drug tested?
Stimulant-containing pre-workouts can contain ingredients that trigger positive tests. This protein powder contains no stimulants and is NSF Certified for Sport, making it a safer post-training and recovery option for tested athletes.
What if I have a dairy sensitivity — is the multi-source protein blend still safe?
The blend relies on milk-derived proteins including whey and casein, so it is not suitable for those with dairy allergies. Anyone with a known sensitivity should consult a healthcare provider before use.
Is the 5-pound canister safe to store around kids and pets in a home gym?
The canister is sealed and should be stored in a cool, dry place out of reach of children and pets, like any nutritional supplement, to prevent accidental ingestion.
How do I mix Muscle Milk Pro Series for the best taste and texture?
Add one scoop to 8–12 ounces of cold water, milk, or your preferred beverage in a shaker bottle and shake for 15–20 seconds. For thicker smoothies or recipes, blend with ice, fruit, or oats.
When is the best time to drink this protein powder?
The most common timing is within 30 minutes after a workout to support recovery, but it also works well as a high-protein breakfast, between-meal protein boost, or before periods of fasting.
Can I use this protein powder in recipes like pancakes, oatmeal, or baked goods?
Yes. The powder can be substituted into recipes for pancakes, oatmeal, protein bars, and baked goods. For baking, reduce other dry ingredients slightly to maintain proper texture.
Does this protein powder work with plant-based milks like almond or oat milk?
Yes. It mixes well with almond, oat, soy, and other plant-based milks, though taste and texture may vary slightly compared to mixing with water or dairy milk.
Is this product compatible with a standard shaker bottle or do I need a special mixer?
A standard shaker bottle with a mixing whisk or blender ball is sufficient. For thicker smoothies, a countertop or personal blender gives the smoothest results.
What is included when I open the canister?
Each canister contains the protein powder and a scoop. You will need to provide your own shaker bottle, milk or water, and any additional mixers or ingredients for recipes.
Is this product safe for long-term daily use?
For healthy adults, daily use within the recommended serving size is generally considered safe. As with any supplement, those with medical conditions or who are pregnant or nursing should consult a healthcare professional.
Does this product contain any common allergens?
Yes, it contains milk-derived ingredients including whey and casein. It is manufactured in a facility that may also process soy, egg, and tree nuts, so check the label if you have specific allergies.
What is the difference between a protein powder and a meal replacement shake?
A basic protein powder is designed primarily to deliver protein, while a meal replacement shake is formulated to provide a broader range of macronutrients and micronutrients. Muscle Milk Pro Series bridges both categories by offering 50g of protein alongside 20 added vitamins and minerals, making it suitable as a high-protein meal replacement.

