How We Do It We assign products a star rating of one to four stars. Four stars are given to our BEST products, three to the GOOD products, two for AVERAGE products and one star for the POOR products. The review ratings are based on published medical and scientific research. Not our personal opinions. These are the general questions we try to answer for each review. How farfetched are the product's claims? Given the ingredient list can the product live up to all of its claims? How much of a “special ingredient” is actually in the product and really, how special is it? Does the product contain problematic ingredients? How does the product differ from similar types of products, including price? Is the product safe? Is the product tested on animals? See animal testing report card.