One writer's experience taking collagen supplements and how it changed her health. Sounds crazy, but adding powdered connective tissue from cows and fish to your morning coffee, smoothies, oatmeal, or juice is suddenly supertrendy among the clean eating crowd.
Photo: Desserts With Benefits. Protein powder is a popular go-to after a workout: Put in a shaker cup, add water, shake, and you have a portable drink to revitalize your muscles and energy. Or add it to a blender with milk, fruit, greens, nut butter, or other fun add-ins, and itâs an anytime snack or meal replacement. (And a delicious one at that.).
Whey and soy protein powders may also cause stomach pain, constipation or diarrhea if you take them in large amounts. Soy protein powder is a concentrated source of phytoestrogens, plant-based compounds that can mimic estrogen hormones in the human body.cientific research has tied several positive side effects to protein powder, especially to whey, but studies are ongoing to evaluate the potential negative effects of various protein powder sources as well.