As of 2015 a review at Supplement Geek concludes that there is no substantial proof that Carnivora works. The Better Business Bureau, or BBB, lists Carnivora Research International as an accredited business with one positive review.
Supplement Geek's critique of Carnivora details an in-depth search through medical databases, literature and research databases for published studies on Carnivora's effects. Despite finding a few obscure mentions of the product, the review concludes that no studies exist to demonstrate the product's efficacy. However, the review from the BBB states that the product works well and that the customer leaving the review recommends the product to others.