Don’t take our word for it. Here’s every fact on this site, with its evidence grade, its caveats, and a link to the source, so you can check us.
We start you on the strong ones: findings that have been replicated or come from one large, well-controlled study. Moderate and weak facts are here too, labeled for what they are. Use “Link to this fact” to share a single card.
Green, natural and unscented / Lab study (cells or chemistry)
A cold-atmospheric-plasma prototype device killed over 90% of two underarm-odor bacteria (Staphylococcus hominis 99.81%, Corynebacterium xerosis 90.99%) after 3 minutes of exposure in lab culture, and cut total electronic-nose sensor response to two major axillary-odor chemicals by about 51% (HMHA) and 34% (3M3SH) after 5 minutes, without applying antimicrobial chemicals or fragrance to skin.
Weak evidence.
Caveats
Antibacterial test used agar-cultured bacteria; deodorizing test used excised porcine skin dosed with pure synthetic odor compounds in methanol, not human sweat. Single lab, single prototype, no independent replication, no human skin testing.
Source: Bok et al. 2024, Scientific Reports Link to this fact
Green, natural and unscented / Test-chamber measurement
The limonene given off by a natural fragrant plant is the same chemical as the limonene in cleaners and air fresheners; in this study three plants took room limonene to about 60-84 ug/m3 on average over 3 hours, in the range of a plug-in air freshener and well below the 1,000-6,000 ug/m3 seen right after terpene cleaning in a chamber.
Weak evidence: Cross-study comparison of different averaging times and rooms; the 'after' means are back-calculated from the dose table; plug-in and cleaning values come from other studies.
Information, not medical advice. See also: myths we won’t tell you.