NUTRILITE Protein Powder provides a natural, lean protein with the added benefits of naturally occurring soy isoflavones. It also provides balanced amounts of the essential and non-essential amino acids. Protein plays a leading role in your body's growth and maintenance. Because your body does not store excess protein, daily intake is necessary. Unfortunately, many protein sources - such as red meat, cheese, eggs and whole milk - also have high levels of fat and cholesterol.