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.
I'm sure this salt is amazing but I don't have a bathtub. I bought it to use it for a cleanse. It says "Salts are FCC Food Grade Magnesium Sulphate" in the description but then says, "not to be ingested" on the back of the packaging. I'm unsure which statement is true now because if it is highest food grade then why would it say not to ingest it?