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Side Effects of Protein Powders – Potential Risks

Side Effects of Protein Powders - Potential Risks
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Potential Risks

Protein powder, the supplement for gains and beyond. Created for the goal to help you reach your overall protein intake for the day. However, while protein powder may be a blessing, it may also be a curse. For some people, protein powder brings along some rather unpleasant side effects. Side effects of protein powders vary from person to person along with the certain type of protein powder they choose to consume. Here in this article, we will discuss the potential hazard each type of protein may hold.

Whey Protein Powder

Whey, one of the most popular protein supplements, is trusted by tons of consumers. As a substance from milk, whey, due to its dairy properties, can bring up some complications side effect wise.


Whey protein powder has ingredients and properties that may cause bloating, as many consumers may agree. Due to the fiber and possibility of swallowing more air, bloating may occur from it. The excess protein can cause a build-up in your intestine, to which we feel in our midsection as bloating.

Side Effects of Protein Powders - Potential Risks

If the bloating proves to be too much, be sure to cut out your sources of protein that is processed an increase in natural whole sources; eggs, chicken fish. Also, try reducing the amount of protein powder you are consuming regularly to see if that may be the culprit for your excessive bloating.


The gassiness is also one of the most inconvenient side effects of protein powders. Protein when broken down, it releases gas likes nitrogen, methane and hydrogen sulfide (the stinky gas).

Referring back to the protein build-up, the food ready to be broken down may rot, and from this, the waste emitted, gas, may bring a wrongful smell. (AKA: Protein Farts)


Side Effects of Protein Powders - Potential Risks

To reduce “protein farts”, try to once again consume your protein from whole foods, since it may because of your lactose intolerance.

Lactose Intolerance

Segwaying from our last section on gassiness, about 30% of the population is lactose intolerant. What does that mean? To define the term, it means your small intestine does not produce enough lactase to break down lactose, resulting in various side effects.

Some of these side effects may include gassiness and bloating as said above, along with…

  • Nausea
  • Headaches
  • Diarrhea
  • Vomiting

Casein Protein Powder

Casein, the neglected little brother of whey, is the longer digesting substance from milk. A little on the pricier side, Casein brings much of the same side effects whey does, except, Casein does not contain lactose, which makes it more suitable for individuals who are lactose intolerant…

Allergic Reactions

Side Effects of Protein Powders - Potential Risks

Although it may be free of lactose, Casein protein still has the potential for allergic reactions for people who are allergic to dairy. I have an entire article explaining allergic reactions with not only casein protein powder but various other protein powder…

Protein Powder Allergy – Allergic RIsks

Vegan Protein Powder

Vegan protein powder separates itself from the dairy-based protein powder since it contains no dairy. It’s plant-based protein sources (like hemp, pea, soy, brown rice) offers a different vegan-friendly protein powder. Not to say it doesn’t hold its various side effects…

High Sodium

This side effect may differ depending on the protein powder maker, but the high amount of sodium may be something to look out for if high blood pressure is a concerning issue. More on sodium risks by clicking here.

Allergic Reactions

Much like the dairy protein powders, vegan protein powders also may cause allergic reactions. Substances like soy and brown rice may cause allergic reactions that have symptoms like vomiting, rashes, diarrhea, and others.


In conclusion, protein powders may pose some risks that even you may have to be cautious for. The allergic reactions, bloating, gassiness and other side effects are something to account for when taking the blessing that is protein powder.

If you have questions about a certain side effect, please feel free to leave them below along with any comments you have regarding side effects.