CytoSport Lawsuit! Muscle Milk Underdosing Protein?

Muscle Milk Lawsuit

Consumers have been working hard to avoid products that have been amino acid spiked or deceptively marketed, but on the flip side, lawyers seem to be rushing to the scene.

On January 23, 2015, a class action lawsuit was filed against CytoSport, makers of the ever-popular Muscle Milk product line.

The complaint alleges that the following products do not meet label claims, via “misrepresentations regarding defendant’s products’ protein content”.

See the 42 page PDF:


What products are allegedly in violation?

The following products are listed in the complaint, and it seems like nearly all of them:

  • The Muscle Milk RTD Products:

    • Cytosport Whey Isolate Protein Drink
    • Monster Milk: Protein Power Shake
    • Genuine Muscle Milk: Protein Nutrition Shake
    • Muscle Milk Pro Series 40: Mega Protein Shake
  • The Muscle Powder Products:

    • Muscle Milk: Lean Muscle Protein Powder
    • Muscle Milk Light: Lean Muscle Protein Powder
    • Muscle Milk Naturals: Nature’s Ultimate Lean Muscle Protein
    • Muscle Milk Gainer: High Protein Gainer Powder Drink Mix
    • Muscle Milk Pro Series 50: Lean Muscle Mega Protein Powder
    • Monster Milk: Lean Muscle Protein Supplement

Quick bullet points

  • Protein Data Provided

    The complaint makes the following allegations regarding Cytosport’s protein content:

    • CytoSport Whey Isolate RTD: 27.3g protein found (instead of 32g claimed)
    • Monster Milk: Between 36.9 and 41.55g found (instead of 45g claimed)
    • Muscle Milk RTD (17oz): Approximately 20.8g found (instead of 32g claimed)
    • Muscle Milk RTD (14oz): Approximately 22.15g found (instead of 25g claimed)
    • Muscle Milk Pro Series 40: Approximately 36.18g found (instead of 40g claimed)
    Muscle Milk Lawsuit

    The 17oz Muscle Milk RTD fared the worst in the alleged tests (which are not provided). Image taken from complaint PDF

  • No detailed lab tests here

    Unfortunately, we do not have any of the lab tests with detailed amino acid profiles, so this is difficult to confirm. There are no exhibits attached (nor are they referenced).

    Instead, the complaint references a third-party supplement testing website named LabDoor, but we’ve been told that there was separate testing done.

  • L-Glutamine Not Found?!

    The lawsuit takes particular offense to L-Glutamine, the conditionally essential amino acid that is claimed to be inside of the Muscle Milk family of products.

    However, L-glutamine was not found in “any appreciable amount” in any of these products.

  • Lean Lipids not so “Lean”?

    The complaint also takes offense to the word lean used in CytoSport’s trademark, Lean Lipids.

    The plaintiffs state that it is “oxymoronic” and that the phrase suggests it contains less fat than other similar supplements, which they then claim to be demonstrably false.

    Further, they claim that the use of the word “lean” “shall be demmed to be misbrand[ing] under sections 201(n), 403(a), and 403(r) of the Federal Food, Drug, and Cosmetic Act.”

  • “Misleading and Deceptive”

    CytoSport Lawsuit

    Did CytoSport mislead and deceive here? That’s up to the courts… but we’d like to see more data first.

    In short, all of the above acts are accused of being misleading and deceptive.

    This isn’t specifically about amino acid spiking like the other lawsuits.

  • Four different classes

    The lawsuit was filed in nationally, in California, in Florida, and in Michigan, and is clearly the largest of any of the amino acid spiking-based lawsuits we’ve seen to date.

  • Due to the numerous states listed above, there are more lawyers in on this one, but one that’s familiar to the other suits is here: BARBAT, MANSOUR & SUCIU PLLC

Some discussion and disclaimer

As always, we must state that these are only accusations, and nothing is proven until due process has taken place.

Further, there are no internal lab tests here, nor are they even referenced.

Instead, they are referencing a third-party website – one which we do love – but one which has commercial interests and has never shown a chain of custody (or at least made a statement about it) to prove that there was no tampering of the product between manufacturing and the lab test.

Until more data is available, we remain speculative that this suit will go anywhere, but it of course depends on the full information as well as the judicial system’s decision-making process.

So is glutamine good or bad?

Also interesting is that first, having extra L-glutamine in your protein powder was “bad” because it can be used to spike the protein (not a completely illegal act unto itself), but now not having it can also get you in trouble (if you claimed you have it!)

Point is, supplement companies now know that they better put what they’re claiming on the label, and they better test both their raw materials and their outgoing product, lest they dance flirt with one of these legal teams down the road.

It’s a scary time to be a supplement company who’s selling protein and isn’t doing the required cGMP testing.

Anonymous Industry Source Speaks

Over on Facebook, our discussion veered in the direction of “this isn’t that bad”.

So we’ll leave you with a great quote was emailed to us by an industry insider:

“To let companies slide for not being ‘as bad’ as the worst companies out there is a huge problem with this industry. It’s real simple: meet your label claims.

About the Author: Mike Roberto

Mike Roberto

Mike Roberto is a research scientist and water sports athlete who founded PricePlow. He is a biohacker with extensive experience in supplementation and dietary modification, whose personal expertise stems from several "n=1" experiments done on himself.

Mike's goal is to bridge the gap between nutritional research scientists and non-academics who seek to better their health in a system that has catastrophically failed the public.

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