Many of us spend a lot of time indoors, usually because of our occupations and long work hours. Of course, recent world events had us spending even more time indoors. We know being outdoors can boost our health due to many factors; one of them involves being in nature. So, can we rely on indoor plants to keep us healthy when we’re stuck inside?
It’s long been known that plants can absorb toxins and improve indoor air quality. More recent studies suggest other benefits to our health. Perhaps we can consider indoor plants as more than merely beautiful decor.
During a series of experiments, researchers calculated plants could reduce nitrogen dioxide (NO2) – a common pollutant – by as much as 20 per cent in some conditions. For example, a poorly ventilated small office (15 m3) with high levels of air pollution would need about five houseplants to reduce NO2 levels by around 20 per cent. In a larger space (100 m3), the effect would be smaller – 3.5 per cent reduction. However, more plants could be added to increase the impact. While these calculations are accurate, the exact mechanism of how plants reduce NO2 levels remains a mystery.
Plant microbiome or microorganisms (bacteria and fungi) also need to be better understood. The bacteria and fungi living on the plant and in its soil can help remove airborne pollutants and offer certain properties to enrich our own good health. However, we don’t know enough to differentiate which microbial species are helpful or harmful (some may trigger allergies or other health issues).
Another recent study found our immune systems are enhanced by a plant’s effect on our skin microbiota. ‘Green walls’ installed in offices significantly increased skin lactobacilli and gammaproteobacteria, which are linked to decreased inflammation and effective immune regulation.
To date, there are several plants recommended for their ability to enhance our good health and help ‘clean’ indoor air: peace lily, Boston fern, asparagus fern, corn plant, golden pothos, Areca palm, lady palm, bamboo palm, dwarf date palm, rubber plant, Ficus Alii, Ficus tree, purple heart, dracaena, philodendron, and many others. Some ivies and the Spider Plant are also suggested. However, more evidence is needed to verify the extent of each plant’s effectiveness.
If you don’t have plants at home or in the office, there’s good evidence to consider buying a plant or two. And they can also serve as a reminder to spend some time outside!
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Eve Lees has been active in the health & fitness industry since 1979. Currently, she is a Freelance Health Writer for several publication and speaks to business and private groups on various health topics.