“…Amid the cacophony of advice offered from the Internet, by professionals, by governments, by peers and so forth, and alongside the eroding trustworthiness of scientific journals, it is understandable that a sober course of ontogenic adaptation to maintain good health might be difficult to achieve. Yet another complicating factor is venality-vested interests abound, and they may not merely be financial; some causes, such as the fluoridation of tap water, are espoused with religious fervour [40]. Only resolutely critical thinking can steer a firm and "good" (ultimately defined in terms of a focal condition [22]) course through such turbulent waters.…”