Meal replacement powders are meant to be healthy, but yes, you can overdo it. Ingesting too many vitamins, too much iron, or too much protein at once can cause myriad health issues, including digestive problems, kidney problems, and bone problems. In addition, some low-quality protein powders may have unsafe levels on contaminants like mercury, arsenic, or cadmium.We recommend you follow the manufacturer’s directions to stay healthy. If you’re looking to increase your serving size or just want some professional guidance, seek out a licensed nutritionist or ask your doctor.