Mostly because they don't back their Keto tone avis claims. Have you noticed fantastic or amazing promises to help you lose pounds a day or permanent weight loss results? The problem is most manufacturers don't support these claims with clinical studies. You cannot know for sure if you buy some real mix of ingredients proven to burn your fat or increase metabolism, or it's just placebo. Another point of concern is natural or herbal ingredients. Natural does not mean safe. Consider this when choosing weight loss pills.

weightlosscharitychallenge.com/keto-tone-avis/