Amazon calculates a product’s star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
Great product, return buyer as hair was super damaged from bleaching from black to ash blonde and hair was very burnt and brittle. After only 2 weeks using this, my hair has started a very dramatic repair and the shine has been restored. and fast shipping