Martek Biosciences Corp., a Columbia-based maker of infant nutritional formula supplements, said Friday it completed the acquisition of Amerifit Brands Inc., which sells consumer health and wellness products. Martek, which announced the deal Jan. 21, bought Amerifit from Charterhouse Group Inc., a New York-based private equity investment firm, for $200 million in cash. The deal was significant for Martek because it intends to develop its own line of consumer products as a way to reinvent its revenue base. Amerifit sells over-the-counter nutritional supplements, such as Culturelle, a probiotic supplement, and Azo, which helps relieve and prevent urinary tract infections. Amerifit has 65 employees and is based on Cromwell, Conn.

- Gus G. Sentementes

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