The precautionary principle is invoked after there has been established that there is risk in the use of a product.
The precautionary principle is invoked when it is supposed that a particular product or a drug could put the lives of people at risk. This has been invoked many times in the health sector.
The situation in which the precautionary principle is least strictly applied is when a chain of health stores is allowed to sell over-the-counter nutritional supplements that have not been tested by the Food and Drug Administration for adverse effects.
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