Natrol Inc. filed for bankruptcy yesterday, a day after a U.S. judicial panel consolidated several class actions accusing the health supplement maker of false marketing of its joint relief products, Reuters reported yesterday. Natrol, a unit of Plethico Pharmaceuticals Ltd. of India, also owns the Laci Le Beau dieter's teas, NuHair and Shen Min hair loss treatments and MRI and Prolab strength supplements. Natrol has been the target in the past year of at least three lawsuits seeking class action status filed in California, Illinois and New York federal courts. The lawsuits say that Natrol's glucosamine-related supplements cannot provide the advertised benefits of regenerating cartilage, lubricating joints and providing comfort, according to court documents.