Lactose-free protein powders are specifically formulated for individuals who are lactose intolerant or have a sensitivity to lactose, a sugar found in milk and milk-based products. They are made from high-quality protein sources such as whey or casein that have undergone a process to remove or significantly reduce the lactose content. Alternatively, most plant protein powders are naturally lactose-free and offer a good option for those that are lactose intolerant.