NSA (formerly National Safety Associates) has a supplement (and a franchising opportunity) it would like for you to swallow. The company distributes Juice Plus+ through a multilevel marketing program. Juice Plus+ is a capsule that, the company claims, provides the nutritional essence of some 20 fruits and vegetables. Franchisees can receive a 6% commission if they enroll five customers in 30 days and a 14% commission if their customer base grows to 20 in 60 days. O.J. Simpson served as a spokesperson for the company until he was charged with, but later acquitted of, two murders in 1994. NSA was founded in 1970 as a door-to-door marketer of fire-protection equipment.