Are There Any Health Risks Associated with Core Power?

January 2, 2026 •

4 min read

According to a Consumer Reports study, Fairlife's Core Power High Protein Chocolate Milk Shake had among the highest levels of potentially hazardous plastic chemicals, known as phthalates. This raises important questions about the overall health risks associated with Core Power and similar protein drinks.

Quick Summary

This article examines the potential health concerns linked to Core Power protein shakes, including artificial sweeteners like sucralose and acesulfame potassium, the additive carrageenan, and reports of plastic chemical contamination. It also addresses the high protein content and overall processing of the beverage.

Key Points

Artificial Sweeteners: Core Power contains sucralose and acesulfame potassium, which are linked to potential metabolic issues like altered insulin sensitivity.
Carrageenan Additive: The shakes use carrageenan, a stabilizer that may cause gut inflammation and irritation, especially for sensitive individuals.
Phthalate Contamination: A Consumer Reports study found high levels of endocrine-disrupting plastic chemicals called phthalates in Core Power shakes.
Ultra-Processed Nature: Classified as an ultra-processed food, regular consumption may contribute to health risks like heart disease, obesity, and diabetes.
Excessive Protein: With up to 42g of protein, the Elite version can provide more than the body can effectively utilize at once for many people.
Dairy Source Concerns: Some versions are made with conventional dairy, which may contain traces of hormones and antibiotics, unlike grass-fed options.
Individual Consideration: People with diabetes, gut sensitivities, or pregnant women should be cautious and consult a doctor before consuming Core Power.

Core Power Ingredients and Their Potential Health Implications

While marketed as a convenient and healthy protein source, Core Power shakes contain several ingredients that have raised concerns among nutritionists and consumer advocacy groups. These concerns go beyond the simple nutritional profile and touch on issues of processing and additives. Understanding each component is crucial for making an informed decision about integrating Core Power into your diet.

Artificial Sweeteners and Metabolic Concerns

Core Power uses artificial sweeteners to reduce sugar content, but these compounds are not without controversy. The shakes typically contain sucralose and acesulfame potassium (Ace-K), both of which have been linked to potential health issues.

Sucralose and Insulin Sensitivity: Some studies have connected regular sucralose consumption to altered insulin concentrations and reduced insulin sensitivity in healthy adults. For individuals with diabetes or those managing their weight, this can be particularly counterproductive.
Acesulfame Potassium (Ace-K): Research has noted potential links between Ace-K and health issues such as hormone disruption, weight gain, and changes in brain function. While the FDA has approved its use, the approval process has been scrutinized for a lack of long-term safety data.

Carrageenan and Gut Inflammation

Another concerning additive found in many Core Power shakes is carrageenan, a stabilizer derived from seaweed. Carrageenan is used to improve the texture and consistency of the drink, but it may have a downside for gut health. Research suggests that carrageenan can act as an inflammatory agent, potentially irritating the intestinal lining. For individuals with inflammatory bowel conditions like colitis or those with a sensitive digestive system, this could exacerbate symptoms. While some debate its effects, it's an ingredient that warrants caution for those with gut health concerns.

Phthalates and Endocrine Disruption

In a concerning discovery, a Consumer Reports test found that the Core Power High Protein Chocolate Milk Shake contained high levels of phthalates, a type of plasticizer. Phthalates are known endocrine-disrupting chemicals, which means they can interfere with the body's hormonal system. Exposure to phthalates has been linked to a variety of health problems, including potential reproductive harm. This contamination highlights broader concerns about food processing and packaging. Fairlife, the manufacturer, did not comment on the findings at the time of the report.

The Ultra-Processed Food Factor

Beyond specific ingredients, Core Power is classified as an ultra-processed food. The Environmental Working Group (EWG) and other experts flag ultra-processed foods due to their links to a higher risk of heart disease, obesity, type 2 diabetes, and mental health issues. These products are engineered for taste and convenience, often relying on additives and intensive processing rather than whole-food nutrition. For health-conscious individuals, relying on such products for a significant portion of their protein intake may not align with a whole-foods-based approach.

Core Power vs. Whole Food Protein Sources

To better understand the trade-offs of using Core Power, comparing it to whole food alternatives is helpful. Whole foods offer complete nutrition without the potential risks associated with additives.


Feature	Core Power Shake	Whole Food Protein Source (e.g., Greek Yogurt, Cottage Cheese)
Processing Level	Ultra-processed, relies on additives.	Minimal processing; a natural, whole food.
Artificial Sweeteners	Contains sucralose and acesulfame potassium, linked to metabolic concerns.	Naturally sweetened with fruit or unsweetened for a sugar-free option.
Additives (Carrageenan)	Contains carrageenan, a potential inflammatory agent.	Does not contain additives like carrageenan.
Convenience	Ready-to-drink, very convenient for post-workout.	Requires preparation or pre-planning.
Nutrient Density	High in protein, but contains less beneficial micronutrients than whole foods.	High in protein, often richer in vitamins, minerals, and probiotics.
Cost	Can be expensive per serving.	Generally more cost-effective per gram of protein.

The Issue with Excessive Protein

For many, the high protein content of Core Power (especially the Elite version with 42g) is a major draw. However, this amount can be excessive for a single sitting, particularly for those with lower body weight or less intense training regimens. The body can only effectively utilize a certain amount of protein for muscle synthesis at one time, typically 30-40 grams. Consuming significantly more than needed can place an added load on the liver and kidneys, potentially leading to long-term health concerns in those with pre-existing conditions. While generally safe for healthy individuals, excessive intake is not necessarily more beneficial for muscle growth and may contribute to fat storage.

Conclusion: Making a Mindful Choice

While Core Power provides a convenient and palatable source of complete protein from ultra-filtered milk, it is not without potential health risks. Concerns surrounding artificial sweeteners, the inflammatory additive carrageenan, and contamination with plasticizers like phthalates are significant. The high level of processing and potential for excessive protein intake further detract from its reputation as a purely healthy choice. For those seeking optimal post-workout recovery or a dietary protein boost, exploring whole-food alternatives like Greek yogurt, cottage cheese, or unflavored protein powders may offer a cleaner nutritional profile with fewer additives. For individuals with metabolic issues, gut sensitivities, or a desire to avoid ultra-processed foods, these alternatives are a safer and more beneficial option. As with any supplement, individual health needs and ingredient sensitivities should be carefully considered.

Considerations for Specific Groups

Certain populations should be particularly mindful of Core Power's ingredients. For pregnant women, individuals with diabetes, or those managing weight, the concerns about artificial sweeteners and additives warrant careful consideration and a discussion with a healthcare provider. The potential for hormone disruption from phthalates is also a serious consideration for reproductive health.

Sources:

Consumer Reports
VeganProteinPowder.reviews
New York Post
EWG's Food Scores

By carefully weighing the convenience against these potential risks, consumers can make a more educated decision about whether Core Power is the right protein supplement for their personal health and wellness goals.

Frequently Asked Questions

The primary health risks associated with Core Power include potential side effects from artificial sweeteners like sucralose and acesulfame potassium, gut inflammation from the additive carrageenan, and contamination with endocrine-disrupting plastic chemicals called phthalates.

Yes, Core Power uses artificial sweeteners, specifically sucralose and acesulfame potassium (Ace-K), to achieve its sweet flavor while keeping the calorie count low. Some research suggests these can impact metabolic health.

Carrageenan, a thickening agent, is a concern because some animal and cell studies have linked it to inflammation, especially in the gut. People with pre-existing digestive issues may experience irritation from this additive.

Yes, a Consumer Reports study found high levels of phthalates, which are plasticizers, in the chocolate Core Power shake. These chemicals are known to be endocrine disruptors and can interfere with the body's hormonal system.

For most people, the high protein content isn't immediately harmful, but it can be excessive for a single serving. Regular, excessive protein intake can place a greater burden on the kidneys and liver.

Individuals with diabetes or those trying to manage their weight should be cautious due to the artificial sweeteners. People with gut sensitivities should consider alternatives due to carrageenan. Pregnant women and teenagers should consult a doctor.

Healthier alternatives include whole foods like Greek yogurt, cottage cheese, or eggs. Alternatively, unsweetened or naturally sweetened protein powders mixed with milk or a plant-based alternative can provide a cleaner protein source without questionable additives.