Best organic meal replacement shakes. All product reviews are submitted by real people, unfiltered by DietShake-Reviews. Shakes that contain whey protein often contain cholesterol, whereas shakes made from plant proteins do not and are much healthier for you. This is why natural protein powders have been developed to cater to those who are concerned about unhealthy ingredients. Best Natural Protein Powders: Greens Today Soy Protein Formula features: Found mainly in whole grains, vegetables, fruits and legumes, dietary fiber helps keep your body regular, also helping it remove toxins by relieving constipation. Controversial Ingredients: Quest Protein Rating Details. Superfoods While some meal replacement shakes contain a necessary vitamin and mineral blend, only the best meal replacement shakes will also include a proprietary superfood blend. Arbonne Rating Details.