Dr. Michael J. Thun, head of wholesale feathers for hair extensions epidemiological research at the American Cancer Society stated “This report updates an earlier review done in the 1990s of the wholesale hair feathers extensions, which the cheap hair feathers called the evidence inadequate to determine the risk of cancer.” This leaves the debate open, somewhat, as to whether or not the same cancer risk is connected with hair dyes and chemicals still in use today in salon’s synthetic feather hair extensions.