The Center for Science in the Public Interest (CSPI) is a Washington, D.C.-based non-profit watchdog and consumer advocacy group that advocates for safer and healthier foods. CSPI is a consumer advocacy organization. Its focus is nutrition and health, food safety, and alcohol policy. CSPI is headed by Michael F. Jacobson, who founded the group in 1971 along with James Sullivan and Albert Fritsch, two fellow scientists from Ralph Naders Center for the Study of Responsive Law. In the early days, CSPI focused on various aspects such as nutrition, environmental issues, and nuclear energy. However, after the 1977 departure of Fritsch and Sullivan, CSPI began to focus exclusively on nutrition and food safety. CSPI has 501(c)(3) status. Its chief source of income is its Nutrition Action Health Letter, which has about 900,000 subscribers and does not accept corporate advertising. The organization receives about 5 to 10 percent of its $17 million annual budget from grants by private foundations.