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Yet, keep in mind that “the licensing effect” is also common in many other instances, such as with people who take prescription medications. For instance, some people on cholesterol-lowering drugs may "justify" their choice of more frequently eating a slice of a triple-layer cake on the basis that their cholesterol-lowering medications will "undo" or "negate" the potential harm of the "forbidden" food.
In fact, such a trend has been registered in the medical literature with people who were taking cholesterol-lowering statin medications (“statins”). Statin drug users indulged in more gluttony –they consumed more calories and fat, and gained weight– than non-statin users (Sugiyama, et al., 2014), presumably because they mistakenly believed that they could practically eat whatever they wanted since they were “protected” by taking these medications. (Topping negligence with irony, the real evidence on statins shows that they do little good but lots of harm –see my article Do Garcinia Cambogia Side Effects Boost Diabetes? ).
The licensing effect creates a trap. A self-constructed “trap of misconception”. The errors of the delusion are that just because you're doing one thing right health-wise doesn't means you're “bullet-proof” against ailments or health issues, and that you can now disregard other health-promoting habits, or that it doesn't matter whether you now engage in health-destructive activities.
The potential undesirable ramifications from the licensing effect suggest that, apart from consuming nutritional supplements, it takes a conscious effort not to neglect other activities and behaviors that support good health (as Spencer said: "The preservation of health is a duty.").