Amazon calculates a product’s star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers, and factors that establish reviewer trustworthiness.
My husband uses the XM for all day energy and it works great. I have been using the Pure only as I have a lot of inflamation, arthritis, etc. and it helps a lot with this issue. I do feel better when I drink it and I just add it to smoothies in the morning.