Whey Protein Has Lactose?

Whey Protein Has Lactose? / Supplements

Whey Protein is whey protein, and is used to help repair muscles after physical activity. Helps in replenishing protein synthesis, and muscle recovery for those who want to increase muscle mass. Excellent source of essential amino acids, no added fats, whey protein promotes increased nitrogen retention (muscle growth factor), is rich in antioxidants, and strengthens the immune system by reducing the symptoms of overtraining, fatigue caused by excessive training.

Whey protein and lactose are compounds found in milk, but they can be separated by a time-consuming process. Whey protein has lactose, but if you are slightly or moderately lactose intolerant, you can use it without presenting any symptoms, as most supplements contain 0.1 grams of lactose for each tablespoon of powder, according to the Institute of Whey Protein.

But if you are completely or seriously lactose intolerant, you may need to use a lactose-free powdered protein, such as a soy-based protein powder or whey protein alone.

Lactose intolerance

Lactose is a sugar found in milk that causes discomfort and digestive problems in some people suffering from intolerance, which may be weak, medium or strong. Lactose is a complex sugar that can not be digested and absorbed by the body without first being divided into galactose and glucose.

People intolerant to lactose do not have lactase, the enzyme responsible for digesting lactose. Without lactase, lactose remains undigested in the body, leading to complications when it enters the colon. Lactose interacts with bacteria in the colon, causing gas, diarrhea, bloating and stomach pain. If you are experiencing some of these symptoms while using the supplement, you should stop using it and make an appointment with your doctor because you are probably lactose intolerant.

Lactose in whey protein

Not all whey protein has lactose in its composition. The two main types of whey are called concentrate and isolate. The concentrated version usually has less protein than the isolate; its total protein content may range from 25% to 89%. About half of the carbohydrate whey concentrate concentrate comes from lactose. Whey isolate, on the other hand, has at least 90% protein. It has also been processed and filtered to eliminate more lactose and has less amount of carbohydrate per serving.

Most whey protein isolates do not contain lactose, but this can vary from brand to brand and from the process used. When in doubt, ask the clerk and confirm the label before purchasing. Nutritionists confirm that the isolated version of whey protein has lactose in a very small or zero amount in its composition, with less than 0.1 grams of lactose per 20 grams of powder, which is less lactose than the amount found in 1 cup of yogurt .


The most effective treatment for symptoms of lactose intolerance is to ingest a lactase supplement before ingesting whey protein. Ingesting the supplement will provide your body with the necessary amount of lactase to successfully digest lactose in whey products.

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If you have little intolerance, it may be that whey causes no nuisance effect or symptom; to take the test, consume a teaspoon of whey to watch for any symptoms. Each day increase the amount you take for 1 teaspoon until you consume a normal serving. Any symptom of malaise or digestive problem occurred, stop using the supplement.


If you are lactose intolerant and choose not to drink whey protein shakes, use whey powder alone and avoid whey concentrates or those that are made from a blend of isolated and concentrated. An alternative may be the use of a lactase enzyme supplement before ingesting it, as stated above, to minimize any negative side effects and increase the absorption of nutrients that may be impaired by the lack of that component in the isolates.

Whey protein is not the only supplement option on the market. There are many natural lactose-free powdered proteins available from other ingredients such as peas, hemp, brown rice, cranberries, soy, eggs and other foods.

Practical suggestions

  1. Change brands: If you always eat a whey protein if you feel bloated or have gas, try changing brands. The brand you use may have too much lactose or too high concentration of certain protein products and any of the compounds may be harmful to your body;
  2. Change the types of protein: If you change the brand of whey protein and do not improve, you probably have lactose intolerance. In that case, you should get whey protein products from rice protein instead of milk. These compounds are hypoallergenic and fortified to contain a full dose of amino acids;
  3. Rate Your Diet: Consider re-evaluating your dairy-based diet, as any milk, yogurt, cheese, sour cream, and other foods you may not know can be causing problems, and the supplement is not necessarily the cause. Fractions of lactose or protein in dairy products may be the problem. Replace cow's milk dairy and dairy products with goat or sheep's milk. You can also substitute foods for soy compounds.


If you have been diagnosed with a milk allergy, which is commonly confused with lactose intolerance, avoid using whey protein. Ingestion may cause mild or severe allergic reactions, such as hives, facial swelling, asthma and digestive complications. If even if you consume the isolated version you have some symptoms, you may be allergic to a protein present in the supplement. If you develop some of the symptoms, talk to your doctor and take an allergy test to identify the problem.

Does the version you use of whey protein have lactose? Has adverse reactions been felt, probably because of a degree of intolerance? Comment below!