Not always, whey hydrolysate can contain some lactose. However, it generally has trace amounts of lactose content compared to other forms of whey protein, such as whey concentrate or isolate, due to the partial hydrolysis process it undergoes. The exact amount of lactose, if any, can vary depending on the product and manufacturing process, but some individuals who are lactose intolerant may still be able to tolerate it better than other forms of whey protein. It's always best to check the ingredient list and label to see if your product is lactose-free.