Bisphenol A (BPA) is a chemical that is used in a variety of consumer products, such as water bottles, dental composites and resins used to line metal food and beverage containers, and also is used in thermal paper cash register receipts. Now, research conducted at the University of Missouri is providing the first data that BPA from thermal paper used in cash register receipts accounts for high levels of BPA in humans. Subjects studied showed a rapid increase of BPA in their blood after using a skin care product and then touching a store receipt with BPA.

"BPA first was developed by a biochemist and tested as an artificial estrogen supplement," said Frederick vom Saal, Curators Professor of Biological Sciences in the College of Arts and Science at MU.and making money, according to a 1992 profile in Business Week, before the magazine became Bloomberg Businessweek.

"He might be strutting around like a peacock today, but he's gonna be a feather duster tomorrow," the elder LeFrak told Business Week when asked about Trump.

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Over time, the LeFraks came out ahead of their competitors. LeFrak is worth $7 billion today, and he's 181st on Bloomberg's list of the world's richest people. Bloomberg puts Trump's wealth at just $2.9 billion -- far less than Forbes's estimate. He doesn't even make the list.

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The LeFraks are a family with long experience in a very competitive industry, but Trump's returns are less even than those of an ordinary investor saving for retirement.

Experts on personal finance generally recommend that people saving for retirement or to