Biggest Loser star and fitness guru, Jillian Michaels, is being sued over a slimming supplement she endorses.

The lawsuit alleges that the “Triple Process Total Body Detox And Cleanse” contains toxic ingredients, and may even be fatal.

Experts say the verdict is still out on whether Michaels’ cleanse is actually poisonous. However, they agree that the product is ineffective at providing any of its supposed benefits, including “reducing belly bloat,” increasing energy levels and “reducing body waste build up.”

The case marks the fourth time Michaels has been sued over her range of products. Because Michael’s products are classified as supplements, rather than drugs, they do not fall under the jurisdiction of the Food and Drug Administration, and are hence not required to list all included ingredients. From the packaging of the supplement it is impossible for users to know exactly what they are getting from the product. One expert told ABC News: “This product is an absurdity.” Another recommended: “If you have any of these problems or need help losing weight, see your physician, not Jillian Michaels.”

Unlike Michaels’ supplement, the popular weight loss treatment Xenical is approved by the FDA. The drug was recommended by an FDA advisory panel, by 11 votes to 3, in January 2003. It was finally made available in 2007 and became the first weight loss drug sanctioned by the US government for over-the-counter use.

Two new slimming pills are currently awaiting judgement from the FDA. Contrave and Locanserin are due to be reviewed later this year. Another diet drug, Qnexa, was recently rejected by the FDA after the risk of side effects was deemed to be too great.

Purists argue that slimming pills should not be necessary to lose weight. However, with 60% of the American population either overweight or obese, authorities have decided that these drugs are useful. David Letterman recently stated that slimming pills are the best way to lose weight for anyone living in American society.