Jillian Michaels Sued by Another Big, Big Fan

If you're keeping score at home, this is the third time Jillian Michaels has been sued over her line of fat burning pills -- but this time, there are allegations they contain a "potentially lethal" blend of ingredients.

In the class action lawsuit, filed today in L.A. County Superior Court, Kathy Hensley claims "The Biggest Loser" trainer "sold her proverbial soul to the devil" by teaming up with the companies that created her fat burner.

Hensley claims Jillian and those companies -- Thin Care and Basic Research -- failed to disclose that the main ingredients of the "Jillian Michael Maximum Strength Fat Burner" allegedly combine to make a "toxic cocktail."

In the lawsuit, Hensley claims one of the pill's ingredients -- citrus aurantium -- is "potentially lethal" and known to cause high blood pressure and serious cardiac problems in certain individuals.

Hensley filed the class action lawsuit against Jillian, Thin Care, Basic Research and Walgreens -- and is suing for less than $5,000,000.