Complex sentence: Mannatech's products have not been evaluated for efficacy in treating any illness or curing any disease, although the company stated in its fiscal year 2006 SEC filing that it contracted with several firms for the purpose of product testing.
Split into simpler sentences: Mannatech's products have not been evaluated for efficacy in treating any illness or curing any disease. The company stated in its fiscal year 2006 SEC filing that it contracted with several firms for the purpose of product testing.