According to a recent study published in the journal Appetite, people who ate meals off of red plates or drank from red cups decreased amount of food they ate by 40 percent. Researchers said the remark-able results may be because people generally associate the color red with concepts like ‘danger, prohibition, and stop.’ To come up with their findings, 41 male students drank tea from cups marked with either red or blue cups. The students drank 44 percent less from the red cups. The students were then served ten pretzels each, either on red, blue, or white plates. Those with red plates ate less pretzels than the rest.
I also recommend using smaller plates and cups to limit portion sizes.