The idea that houseplants clean indoor air comes from a 1989 NASA study. Supplement and plant marketers cite this study endlessly. Here is what it actually showed — and what it did not.
The study tested plants in sealed chambers under controlled conditions. Real homes have far more air volume, air exchange with outdoors and pollutant sources than a sealed chamber. Follow-up research consistently shows that you would need hundreds of plants in a typical room to measurably affect air quality.
Improve aesthetics and mood. Slightly increase humidity. Provide psychological wellbeing benefits. All worthwhile — just not for the air quality reasons commonly claimed.
HEPA air purifiers, adequate ventilation, source control (low-VOC products, no indoor smoking) and humidity management. Lungora provides antioxidant support, but environmental controls are what actually improve the air you breathe.