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Medical Letter has been providing trusted prescription drug information and drug facts since 1959, and Kallet is also the co-founder of Consumer Research (later the Consumer Alliance) who began publishing the Consumer Report. Aaron is a physician who is on the advisory board of the Consumer Alliance. They say that if the new prescription drugs have no advantages, they have limited effects, or they are too toxic or too expensive to be used reasonably. If there is a change in the identity of a previously reviewed drug as new drug information changes, they post follow-up reports. Some say that it played an important role in the Food and Drugs Act of 1938, which for the first time required that drugs must be proven safe before they were sold. All Medical Letter, Inc. products are a valuable source of reliable, objective and impartial drug information.