Using whey protein powder if you're lactose intolerant poses no threat to your condition, unless you're severely intolerant. Whey powder contains such a small amount of lactose that does not cause symptoms in most lactose-intolerant people. If you have any question whether you should consume whey powder or not, avoid using it and substitute it with soy protein powder. Any adverse reactions that occur from using whey powder need to be discussed with your doctor.
Lactose Intolerance
A deficiency in the digestive system causes lactose intolerance. Lactose is a sugar in milk that some people have difficulty digesting. When you ingest proteins and sugars, your digestive system produces enzymes that break down those substances so the body can absorb them. If you lack the enzyme lactase you can't break down the milk sugar.
Whey Powder
Whey powder comes from cow's milk. Cow's milk contains whey and casein proteins that are used for various purposes. Whey comprises protein powders that can be added to diet bars, sports shakes and body-building snacks. Casein is used to make cheese. Whey powder does contain lactose, but in a very small amount. According to the Whey Protein Institute, 1 tsp. of whey powder contains less than 0.1 g of lactose. This amount of lactose typically does not cause symptoms, even in lactose-intolerant people.
Challenging Whey Powder
Every body is different and not everyone produces the same amount of lactase. If you develop digestive complications after ingesting even a small amount of lactose, you are most likely severely intolerant and should avoid whey powder. Challenge your body by taking 1/2 tsp. of whey powder. Increase the amount you consume daily by one-half. Stop the challenge once you reach the recommended single serving or once you develop symptoms.
Consideration
If you develop digestive symptoms after ingesting whey powder use a lactase enzyme supplement before consuming whey powder, MayoClinic.com advises. Taking a lactase supplement replaces the amount of lactase the body lacks and allows you to digest whey powder without major complications.
