Fruit and vegetable powders – sometimes referred to as “greens powders” – are dietary supplements that contain various blends of dehydrated fruits, vegetables, grains, and grasses. They often contain other ingredients like probiotics, digestive enzymes, vitamins, minerals, plant extracts, and functional fibers. Though they do provide small amounts of absorbable nutrients, they can’t replace whole foods, and may be contaminated with harmful or banned substances.