“Sending people diet bars, shakes, teas, etc. with clothes they bought can send a negative message about body image,” said one. Atkins also issued a statement on Tuesday, obtained by PEOPLE.

Several ready-made foods are promoted on the Atkins diet. This includes shakes and convenience bars, many of which contain sodium and artificial sweeteners, as well as processed ingredients.

The Atkins diet is a low-carb diet divided into four phases and designed to help you lose weight. Unlike keto, the Atkins diet encourages you to incorporate carbohydrates back into your meals.