Plant Protein is a great protein source that helps to build lean muscle mass provides optimum nutrition and it keeps your hunger more satisfied than other protein powders. Its balanced amino acid profile with BCAAs is great for when you are working out and challenging your muscles. Lean & Pure Plant Protein is great for athletes and anyone looking for a healthy lowercalorie snack. Most commercially available protein powders are derived from soy rice eggs or dairy which are often problematic for those with allergic dietary concerns.hypoallergenic protein that yields a high biological value (BV) (65.4%). The BV is an accurate indicator of the biological activity of protein. It measures the actual amount of protein deposited per gram of protein absorbed. High BV proteins are a better choice for increased nitrogen retention enhanced immunity and IGF1 (insulinlike growth factor) stimulation. They are superior for reducing lean tissue loss from various wasting states than proteins with a low BV score.