Casein+ | Casein Protein Powder

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Our "No Return Necessary"
Money-Back Guarantee

If you don’t like something of ours, guess what happens next?

No, we don’t request you deliver it to a PO box in the Gobi Desert by carrier pigeon. Nor do we ask you to fill a cursed inkwell with orc’s blood and demon saliva and then use it to complete reams of return forms written in ancient Cyrillic script.

We just . . . wait for it . . . give you your money back. Holy moo cows. And that means you can say "yes" now and decide later.

Why International Bestselling Author Mike Matthews Created Casein+

Want an easy, healthy, and delicious way to eat more high-quality protein?

Looking for a low-calorie, low-carb, and low-fat casein protein powder that doesn’t upset your stomach?

Interested in supporting sustainable and wholesome farming and husbandry practices?

If so, you want Casein+.

It’s a 100% natural Truly Grass Fed™ Truly Grass Fed™ milk is sourced from healthy cows that live how nature intended--outside, roaming and grazing on acres of lush, plentiful grass--and aren't injected with growth hormones or antibiotics. micellar casein protein powder made with milk from small dairy farms in Ireland Ireland produces some of the healthiest, cleanest milk in the world, and we work with farms certified by Ireland’s Sustainable Dairy Assurance Scheme (SDAS), which ensures the farmers adhere to best practices in animal welfare, sustainability, product quality, traceability, and soil and grass management. .

Micellar casein is the highest quality casein you can buy, and that’s why every serving of Casein+ contains 25–26 grams of protein and 5.1 grams of branched-chain amino acids Branched-chain amino acids (BCAAs) are three amino acids (leucine, isoleucine, and valine) that are most responsible for protein's muscle-building effects. with little or no carbohydrate and fat.

Casein+ is also naturally sweetened and flavored Casein+ contains no artificial sweeteners, flavoring, or other chemical junk. Instead, it has natural sweeteners and flavoring, which can confer health benefits like better insulin sensitivity, a lower cholesterol profile, and improved blood glucose control. and contains no artificial food dyes or other chemical junk.

So, if you want mouth-watering, high-protein, low-calorie casein protein shakes that help you reach your fitness goals faster . . . you want to try Casein+ today.

You won’t be disappointed.

In fact, if you don’t absolutely love Casein+, just let us know and we’ll give you a full refund on the spot If you don't absolutely love Casein+ for whatever reason, you get a prompt and courteous refund. No forms to fill out or hoops to jump through. That means you can say "yes" now and decide later. . No form or return necessary.

You really can’t lose, so order now, and try Casein+ risk-free and see if it’s for you.

Notice to California Consumers

WARNING: Consuming this product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to

See how Legion compares to the rest.

  • Protein Per Serving
  • Calories Per Serving
  • 100% Micellar Casein Protein
  • Certified Truly
  • No Added Sugars
  • 100% Natural Ingredients
  • Naturally Sweetened
    & Flavored
  • Lab Tested
  • Labdoor
    Certified Brand
  • Price Per Serving
  • Legion Casein+
    Protein Powder

    Casein+ Protein Powder
  • 25–26 g
  • 110–140
  • true
  • true
  • true
  • true
  • true
  • true
  • true
  • $
  • Gold Standard
    100% Casein

    Gold Standard 100% Casein
  • 24 g
  • 120
  • true
  • close
  • true
  • close
  • close
  • close
  • close
  • $1.44
  • Pro JYM
    Protein Blend

    Pro JYM Protein Powder
  • 24 g
  • 140–170
  • close
  • close
  • true
  • close
  • close
  • close
  • close
  • $1.40
  • PEScience
    Select Protein

    PEScience Select
  • 23–24 g
  • 120
  • close
  • close
  • true
  • close
  • close
  • close
  • close
  • $1.30
100% Natural Ingredients
100% Natural Ingredients

Casein+ doesn’t just “contain natural ingredients”—every ingredient is naturally sourced. We don’t use artificial or synthetic substances of any kind.

Clinically Effective Doses
Clinically Effective Doses

Every ingredient and dose (important!) in our supplements is backed by peer-reviewed scientific research demonstrating clear benefits.

Naturally Sweetened & Flavored
Naturally Sweetened & Flavored

Casein+ is naturally sweetened and flavored with healthy, plant-based sweeteners and flavors.

Lab Tested
Lab Tested

Casein+ is tested by third-party labs for heavy metals, microbes, allergens, and other contaminants to ensure it meets FDA purity standards.

Made in USA
Made in USA

Casein+ is proudly made in America in NSF-certified and FDA-inspected facilities in accordance with the Current Good Manufacturing Practice (cGMP) regulations.

100% Money-Back-Guarantee
"No Return Necessary"
Money-Back Guarantee

If you don't absolutely love Casein+, just let us know, and you’ll get a prompt and courteous refund. No forms or returns necessary.

Ingredients (30 grams per serving)

Truly Grass Fed™ Micellar Casein Protein Powder(26 grams per serving)

Micellar casein is a form of casein protein that has been produced in a way that maximally preserves its slow-digesting properties.

It’s the highest quality casein protein powder you can buy and has a stellar amino acid profile, providing you with 13 grams of essential amino acids per serving.

Casein+ is also made with non-GMO Truly Grass Fed™ casein protein, which comes from hormone- and antibiotic-free milk produced by small, sustainable dairy farms in Ireland.

Truly Grass Fed™ Micellar Casein Protein Powder (26 grams per serving)

Grass-Fed Micellar Casein Protein (26 grams per serving)

100% Naturally Sweetened & Flavored

No Artificial Food Dyes or Other Chemical Junk

100% Naturally Sweetened & Flavored

While artificial sweeteners may not be as dangerous as some people claim, studies suggest that regular consumption of these chemicals may indeed be harmful to our health.[1][2][3][4][5][6]

That’s why we use the natural sweeteners stevia and erythritol instead. Studies show that they’re not only safe but can also confer several health benefits, including better insulin sensitivity, a lower cholesterol profile, improved blood glucose control, potential anti-cancer effects, lower blood pressure and inflammation levels, and more.[7][8][9][10]

No Artificial Food Dyes or Other Chemical Junk

As with artificial sweeteners, studies show that artificial food dyes may cause negative effects in some people, including gastrointestinal toxicity and behavioral disorders.[11][12][13][14][15]

That’s why we use natural coloring derived from fruits and other foods, as well as natural flavoring.

No Artificial Food Dyes or Other Chemical Junk

No Artificial Food Dyes or Other Chemical Junk

Lab Tested for Potency & Purity

Lab Tested for Potency & Purity

Lab Tested for Potency & Purity

Every bottle of Casein+ is analyzed in a state-of-the-art ISO 17025 accredited lab to verify what is and isn’t in it. That way, you know exactly what you’re getting and putting into your body.

Casein Lab Test Certificate

How to Use Casein+

As a dietary supplement, mix 1 serving of Casein+ with 8-10 oz of water, milk, or your favorite beverage.

For pre-bed nutrition, take 1 serving 30 to 60 minutes before going to sleep.

For pre-workout nutrition, take 1 serving 30 to 60 minutes before working out.

For post-workout nutrition, take 1 serving within 60 minutes of finishing working out if you weigh less than 150 pounds and 2 servings if you weigh more than 180 pounds.

Supplement Facts

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Ingredients & Nutrition

  • Milk Chocolate
  • Casein+ Milk Chocolate Supplement Facts
  • Vanilla
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Casein+ Milk Chocolate Supplement Facts Casein+ Vanilla Supplement Facts Casein+ Strawberry Supplement Facts Casein+ Banana Cream Pie Supplement Facts


As a dietary supplement, mix 1 serving with 8-10 oz of water, milk, or your favorite beverage.


Not intended for persons under the age of 18. Do not use if pregnant or nursing. Consult a health care professional prior to consumption if you have any pre-existing medical conditions or are taking any prescription medication. Improper use of this product will not improve results and is potentially hazardous to a person’s health. Use only as directed.


Frequently Asked Questions

Why is Casein+ more expensive than other casein protein supplements?
How much casein protein can I eat per day?
I’ve heard that eating casein protein after a workout can help me build muscle faster. Is that true?
If Casein+ is too sweet/strong or isn't sweet enough for me, what should I do?
What does the Prop65 warning on the label mean?
Is Casein+ gluten-free or vegetarian?

+Scientific References

1. Artificial Sweeteners: History and New Concepts on Inflammation.

Basson AR, Rodriguez-Palacios A, Cominelli F. Front Nutr. 2021;8:746247. Published 2021 Sep 24. doi:10.3389/fnut.2021.746247.

2. Non-caloric artificial sweeteners and the microbiome: findings and challenges.

Suez J, Korem T, Zilberman-Schapira G, Segal E, Elinav E. Gut Microbes. 2015;6(2):149-155. doi:10.1080/19490976.2015.1017700.

3. What made Canada become a country with the highest incidence of inflammatory bowel disease: could sucralose be the culprit?

Qin X. Department of Surgery, University of Medicine and Dentistry of New Jersey, New Jersey Medical School, Newark, New Jersey, USA. Can J Gastroenterol. 2011 Sep;25(9):511.

4. Artificial Sweeteners Negatively Regulate Pathogenic Characteristics of Two Model Gut Bacteria, E. coli and E. faecalis.

Shil A, Chichger H. Int J Mol Sci. 2021;22(10):5228. Published 2021 May 15. doi:10.3390/ijms22105228.

5. Artificial sweeteners induce glucose intolerance by altering the gut microbiota.

Suez J, Korem T, Zeevi D, et al. Nature. 2014;514(7521):181-186. doi:10.1038/nature13793.

6. High-intensity sweetener consumption and gut microbiome content and predicted gene function in a cross-sectional study of adults in the United States.

Frankenfeld CL, Sikaroodi M, Lamb E, Shoemaker S, Gillevet PM. Ann Epidemiol. 2015;25(10):736-42.e4. doi:10.1016/j.annepidem.2015.06.083.

7. Steviol glycosides from Stevia: biosynthesis pathway review and their application in foods and medicine.

Yadav SK, Guleria P. CSIR-Institute of Himalayan Bioresource Technology, Palampur, 176061, HP, India. Crit Rev Food Sci Nutr. 2012;52(11):988-98.

8. Antioxidant, anti-diabetic and renal protective properties of Stevia rebaudiana.

Shivanna N, Naika M, Khanum F, Kaul VK. Department of Applied Nutrition, Defence Food Research Laboratory, Mysore, India. J Diabetes Complications. 2013 Mar-Apr;27(2):103-13.

9. Safety evaluation of certain food additives.

World Health Organization. WHO Press; 2006. Available at: Accessed January 24, 2019.

10. Effects of Stevia rebaudiana (Bertoni) extract and N-nitro-L-arginine on renal function and ultrastructure of kidney cells in experimental type 2 Diabetes.

Ozbayer C, Kurt H, Kalender S, Ozden H, Gunes HV, Basaran A, Cakmak EA, Civi K, Kalender Y, Degirmenci I. Department of Medical Biology, Faculty of Medicine, Eskisehir Osmangazi University, Eskisehir, Turkey. J Med Food. 2011 Oct;14(10):1215-22.

11. Toxicological significance of azo dye metabolism by human intestinal microbiota.

Feng J, Cerniglia CE, Chen H. Division of Microbiology, National Center for Toxicological Research, US Food and Drug Administration, AR , USA. Front Biosci (Elite Ed). 2012 Jan 1;4:568-86.

12. Artificial food dyes and attention deficit hyperactivity disorder.

Kanarek RB. Department of Psychology, Tufts University, Medford, Massachusetts, USA. Nutr Rev. 2011 Jul;69(7):385-91.

13. Meta-analysis of attention-deficit/hyperactivity disorder or attention-deficit/hyperactivity disorder symptoms, restriction diet, and synthetic food color additives.

Nigg JT, Lewis K, Edinger T, Falk M. Oregon Health and Science University, Portland, OR, USA. J Am Acad Child Adolesc Psychiatry. 2012 Jan;51(1):86-97.e8.

14. Food additives and hyperactive behaviour in 3-year-old and 8/9-year-old children in the community: a randomised, double-blinded, placebo-controlled trial.

McCann D, Barrett A, Cooper A, Crumpler D, Dalen L, Grimshaw K, Kitchin E, Lok K, Porteous L, Prince E, Sonuga-Barke E, Warner JO, Stevenson J. School of Psychology, Department of Child Health, University of Southampton, Southampton, UK. Lancet. 2007 Nov 3;370(9598):1560-7.

15. Effect of food azo dye tartrazine on learning and memory functions in mice and rats, and the possible mechanisms involved.

Gao Y, Li C, Shen J, Yin H, An X, Jin H. Scientific and Technological College of Chemistry and Biology, Yantai Univ., Yantai, PR China. J Food Sci. 2011 Aug;76(6):T125-9.

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