In February 2006, the U.C. Berkeley Wellness Newsletter, sponsored by the University of California at Berkeley, said that "Mangosteen marketers make farfetched and unsubstantiated claims for their products." The newsletter notes that "there are no clinical trials, and what happens in a test tube or animal may not occur in a human. Any reported benefits in humans have been anecdotal. No one even knows if the processed fruit juice and capsules retain the potentially beneficial compounds. What’s more, the juice is typically a mix of fruit juices – with an undisclosed amount of mangosteen in it."