Premier Protein is a popular and convenient source of protein, widely available and often praised for its high protein-to-calorie ratio. However, many people report experiencing digestive discomfort after consuming the shakes. The reasons for these stomach issues can range from ingredient sensitivity to how and when the shake is consumed. Understanding the potential culprits can help you determine if the product is right for you and what alternatives exist.
Why Premier Protein Can Cause Stomach Discomfort
The Culprit: Lactose and Dairy Sensitivity
Premier Protein shakes contain dairy-based proteins, including whey protein concentrate and milk protein isolate. Whey protein concentrate, in particular, has higher levels of lactose compared to its more filtered counterpart, whey protein isolate. For individuals with lactose intolerance, consuming products with lactose can lead to bloating, gas, abdominal cramps, and diarrhea. Considering that a large percentage of the global population is lactose intolerant, this is a significant factor. Even those with mild sensitivity may experience symptoms, and the severity can depend on the amount of lactose consumed.
Hidden Additives and Sweeteners
Beyond the protein source itself, Premier Protein's formulation includes other ingredients that can wreak havoc on sensitive digestive systems.
- Artificial Sweeteners: The shakes are sweetened with sucralose and acesulfame potassium. Some studies suggest that artificial sweeteners can negatively affect the gut microbiome, leading to digestive problems. They are also known to have a laxative effect in sensitive individuals, potentially causing diarrhea.
 - Thickeners and Additives: Ingredients like carrageenan, cellulose gel, and cellulose gum are used to improve texture and mouthfeel. However, carrageenan has been linked to potential gut inflammation and gastrointestinal issues in some research, though regulatory bodies often consider it safe. These additives can contribute to bloating, gas, and diarrhea, especially with regular consumption.
 
Overwhelming the Digestive System
Even a high-quality protein can cause issues if not consumed correctly. The body can only digest a certain amount of protein at one time (typically 25–35 grams per meal). Premier Protein shakes deliver a large dose of protein in a single serving, which can overwhelm the digestive system of some individuals, leading to discomfort. Other factors include:
- Drinking Too Quickly: Gulping down a shake can introduce excess air into your stomach, causing bloating and gas.
 - Consuming Post-Workout: After an intense workout, your body's energy is redirected away from the digestive system. Drinking a protein shake immediately can be too much for the system to handle, leading to distress. It is recommended to wait about 30 minutes to allow your body to settle before consuming.
 
Lack of Fiber and Hydration
Substituting regular, whole-food meals with protein shakes can lead to a diet low in dietary fiber. Fiber is essential for healthy digestion and regular bowel movements. Without sufficient fiber, excessive protein intake can lead to constipation. Additionally, protein metabolism requires water, and inadequate hydration can exacerbate digestive issues like constipation.
Comparison of Protein Types for Sensitive Stomachs
| Feature | Whey Protein Concentrate (WPC) | Whey Protein Isolate (WPI) | Plant-Based Protein (Pea, Hemp) | 
|---|---|---|---|
| Protein Content | 70–80% | >90% | Varies, can be high | 
| Lactose Content | Higher levels | Very low to negligible | None | 
| Digestibility | Can be tough on sensitive stomachs due to higher lactose and fat | Easier to digest; rapidly absorbed | Hypoallergenic, easy on the gut | 
| Best for | Individuals with no lactose sensitivity and who want an affordable protein option | Those with lactose intolerance or sensitive digestion who prefer a milk-based protein | Vegans, those with dairy or soy allergies, and individuals seeking a hypoallergenic option | 
| Potential Downside | Higher chance of digestive issues like bloating and gas | Often more expensive due to additional processing | Some individuals may find the taste or texture different | 
How to Mitigate Digestive Discomfort from Protein Shakes
If you find that Premier Protein shakes consistently cause digestive distress, there are several steps you can take to minimize or eliminate the problem.
- Switch to a Different Protein Type: If lactose is the issue, opt for a whey protein isolate or a plant-based alternative. Many brands offer lactose-free options that can provide similar nutritional benefits without the side effects.
 - Mind Your Serving Size and Timing: Instead of consuming a large shake all at once, try a smaller serving. Allow about 30 minutes after an intense workout before drinking your shake to give your digestive system time to recover.
 - Consider Hydrolyzed Protein: Hydrolyzed protein is partially broken down during processing, making it easier for your body to absorb and less likely to cause issues.
 - Stay Hydrated and Add Fiber: Ensure you drink plenty of water throughout the day. If needed, supplement with fiber-rich foods or a fiber supplement to promote regularity and aid digestion.
 - Seek Alternatives with Natural Sweeteners: Look for protein products that use natural sweeteners like stevia or monk fruit, or choose unflavored options to avoid the potential gut-disrupting effects of artificial sweeteners.
 - Prepare and Consume Correctly: Mix your powder thoroughly to prevent clumping. Sip your shake slowly to avoid swallowing excess air, which can cause bloating.
 
It is important to remember that not all protein supplements are created equally, and what works for one person may not work for another. You can read more about potential side effects of whey protein on Healthline.
Conclusion
While Premier Protein offers a convenient and high-protein option, its use of whey concentrate, artificial sweeteners, and additives can be harsh on sensitive digestive systems, leading to bloating, gas, and other discomforts. Factors like lactose intolerance, individual metabolism, and consumption habits all play a role. By understanding these potential causes, you can make informed decisions. Exploring alternatives like whey protein isolate, plant-based proteins, or naturally sweetened options can help you achieve your nutritional goals without the unwanted digestive side effects.