Trials for Health Promotion by Indoor Environment Modifications

Two attempts to address health issues by indoor environment modifications are introduced. One approach involves enhancement of natural killer cell activity by negatively charged particle dominant indoor air conditions (NCPDIAC) resulting from extra-porous charcoal paint and application of an electric voltage on the wall surface to adsorb positively charged small particles (approx. 20 nm in diameter). This apparatus creates relatively continuous NCPDIAC. The other approach involves prevention of pollen allergy symptoms by a cloth containing specific ore powder (CCSNOP). With the former approach, we engaged in short-term (2.5 hour), middle-term (2 W night stay), and long-term (3 M) stays under NCPDIAC and found that IL-2 levels increased under short-term stays and that natural killer cell activity was enhanced in middle- and long-term stay experiments. Implementation of this strategy may partially prevent the occurrence of cancers and viral-mediated diseases. With the latter approach, a 1-hour stay within a CCSNOP room resulted in improvement of symptoms in patients with pollen allergies in addition to a reduction in bad moods caused by any remaining symptoms. In both cases, longer-term experiments should be performed in an effort to confirm and delineate the biological effects of these indoor environment modifications on human health problems.