<unk>  <unk> , also known as idiopathic environmental intolerances (IEI), is an unrecognized and controversial diagnosis characterized by chronic symptoms attributed to exposure to low levels of commonly used<unk> s. Symptoms are typically vague and non-specific. They may include fatigue, headaches, nausea, and dizziness. Although these symptoms can be debilitating,<unk>  is not recognized as an organic,<unk> -caused illness by the World Health Organization, American Medical Association, nor any of several other professional medical organizations. Blinded clinical trials show that people with<unk>  react as often and as strongly to placebos as they do to<unk>  stimuli; the existence and severity of symptoms is seemingly related to perception that a<unk>  stimulus is present. Commonly attributed substances include scented products (e.g. perfumes), pesticides, plastics, synthetic fabrics, smoke, petroleum products, and paint fumes.
Multiple chemical sensitivity
Acute to chronic ratio
Cold sensitivity
Hypoallergenic
Oat sensitivity
Acid-fastness
Vangent
Depurative