Whey protein contains small amounts of lactose. Whey protein isolate is lower in lactose than whey protein concentrate, so you will likely be able to tolerate whey isolate if you are lactose intolerant. Whey protein in its pure form does not contain gluten, but it may be found in gluten-containing sports products. Some whey protein powders may also be produced in facilities that manufacture gluten-containing products, so there may be risk of cross contamination unless the product is labeled gluten-free.