
Muscle Milk is a protein supplement that has been marketed as a way to build muscle and lose fat. However, it has been the subject of controversy due to concerns about its ingredients, including artificial sweeteners, high levels of fat, and traces of arsenic. In 2013, the company behind Muscle Milk, CytoSport, was served with a class-action lawsuit for false advertising claims, and in 2011, the U.S. Food and Drug Administration sent a warning letter regarding the claim that Muscle Milk contains no milk. Despite these concerns, some consumers have reported positive experiences with Muscle Milk, citing its taste and effectiveness in building muscle.
| Characteristics | Values |
|---|---|
| Muscle Milk's ingredients | In 2012, a Consumer Reports test found three servings provided an average of 14.3 µg of arsenic. |
| Muscle Milk's marketing | In 2013, CytoSport was served with a class-action lawsuit for false advertising claims. |
| Muscle Milk's side effects | Muscle pain, cramps, allergic reactions, and an altered gut bacteria. |
| Muscle Milk's taste | Some say it is too sweet. |
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What You'll Learn

Muscle Milk's side effects
Muscle Milk is a popular workout recovery drink. While it offers some protein-packed perks, it's important to be aware of its potential side effects.
Firstly, Muscle Milk contains artificial sweeteners, which can negatively alter gut bacteria, appear in breast milk, and potentially increase the risk of certain diseases. Acesulfame potassium and sucralose are two such sweeteners found in Muscle Milk, and they have been linked to weight gain and insulin resistance. This is a concern for those with food allergies or chronic kidney conditions, as well as those taking prescription medication. It is recommended to consume additional water to help flush the kidneys when taking in extra protein.
Secondly, Muscle Milk is high in fat, with 12% of your daily value of total fat and 18% of saturated fat. This can be problematic for those on calorie-controlled diets, as it may push you over your daily limit.
While Muscle Milk can provide sustained energy and support muscle recovery, it's important to be aware of these potential side effects and consume it with caution.
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Muscle Milk's ingredients
Muscle Milk is a protein supplement that comes in powder and shake form. It is marketed as a product that can help people become stronger and perform better. The product is NSF Certified for Sport, meaning it is safe and free of banned substances.
The ingredients in Muscle Milk vary depending on the flavour. For example, the Vanilla Crème flavour contains water, milk protein isolate, calcium caseinate, sodium caseinate, soluble corn fibre, high oleic sunflower oil, cellulose gel, natural and artificial flavour, tripotassium phosphate, mixed triglycerides, potassium chloride, sunflower lecithin, potassium phosphate, cellulose gum, sodium polyphosphates, carrageenan, salt, sucralose, acesulfame potassium, ascorbic acid (preserves freshness), sodium citrate, vitamin A palmitate, and vitamin D3.
Other flavours may contain additional or different ingredients, such as alkalized cocoa powder, canola oil, magnesium phosphate, and maltodextrin. It is important to check the ingredient list for each specific product to know exactly what is included.
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Muscle Milk's taste
Muscle Milk is a high-protein product made by CytoSport, which has been marketed as containing "healthy fats". However, the company was served with a class-action lawsuit in 2013 for false advertising claims, as the drinks were found to contain as much total and saturated fat as Krispy Kreme doughnuts.
Muscle Milk has also been criticised for its use of artificial sweeteners, which can negatively alter gut bacteria, appear in breastmilk, and potentially increase the risk of certain diseases.
Despite these controversies, some consumers have praised Muscle Milk for its taste, with one reviewer describing the vanilla flavour as tasting like cake. However, they also noted that it was a bit too sweet for their liking.
Muscle Milk has also been found to contain high levels of arsenic, with a 2012 Consumer Reports test showing that three servings provided an average of 14.3 µg of arsenic, approaching the proposed USP limit of 15 µg per day. Heavy metal contamination is a serious concern, and consumers are advised to avoid relying solely on Muscle Milk for their nutritional needs.
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Muscle Milk's health benefits
Muscle Milk is a popular workout recovery drink, packed with protein, calcium and sodium caseinate, milk protein, maltodextrin, and a vitamin-mineral blend. It's designed to fuel workouts, build muscle mass, and assist with muscle recovery.
Muscle Milk is particularly beneficial for those looking to build muscle mass or in need of a quick energy boost. The drink contains protein, a nutrient essential to muscle repair and growth.
However, it's important to be aware of the potential downsides of Muscle Milk. The drink contains a significant amount of fat, which may push you over your daily limit if you're on a calorie-controlled diet. Most varieties also contain artificial ingredients, including sweeteners, which have been linked to an increased risk of certain diseases and can harm the balance of gut bacteria.
Additionally, Muscle Milk uses emulsifiers such as carrageenan and cellulose gum to improve taste and extend shelf life. These additives have been associated with greater risks of cardiovascular disease and may negatively impact your gut microbiome. A 2012 Consumer Reports test also found that three servings of Muscle Milk provided an average of 14.3 µg of arsenic.
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$16.36 $17.96

Muscle Milk's marketing
The brand has introduced new, lower-calorie options with revamped packaging and shorter ingredients lists to appeal to a broader audience. Its marketing now features men and women participating in more accessible athletic activities, such as pick-up football and yoga. This shift reflects the brand's efforts to attract different types of customers, including female consumers, with options like an organic line and lower-calorie options.
Muscle Milk has also utilised mobile advertising to target sports fans during events like the National Collegiate Athletic Association's March Madness basketball tournament. The brand has enlisted professional athletes as spokespeople and partnered with mobile platforms to reach consumers who are away from televised games and relying on their mobile devices to stay connected.
In 2020, Muscle Milk launched a campaign centred around the concept of mental strength and resilience, with the tagline "Own Your Strength". This campaign aimed to resonate with consumers during the pandemic without directly linking its marketing to COVID-19. The brand emphasised the idea of "inner strength" and how its products could support consumers' mental resilience.
More recently, in 2024, Muscle Milk introduced a new tagline, "Strength For It All", reinforcing its focus on inclusivity and accessibility. The brand continues to leverage athlete endorsements, partnering with basketball, baseball, and soccer players to promote its products, including its new plant protein shakes.
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Frequently asked questions
Yes, Muscle Milk contains artificial sweeteners, which can negatively alter gut bacteria, appear in breastmilk, and potentially increase the risk of certain diseases.
Yes, Muscle Milk has been criticised for containing as much total and saturated fat as Krispy Kreme doughnuts.
Yes, Muscle Milk has been found to contain arsenic, which can cause cancer, heart disease and diabetes.
Muscle Milk doesn't contain actual milk, but it does contain whey and casein proteins, which are derivatives of milk that may trigger an allergic reaction in some people.










































