Product Research Dispatch: A 5,000-Year-Old Toothbrush Just Beat Modern Antiseptics in a Clinical Trial

Hey friends, this week’s dispatch comes from a rabbit hole we didn’t expect to fall into. We were investigating toothpaste tablets for an upcoming guide when we found something that genuinely surprised us: neem, the tree people have been chewing sticks from for 5,000 years, has serious, peer-reviewed clinical evidence backing it up.

Not “promising early results.” Not “traditional use suggests.” Actual randomized controlled trials. Against the strongest antimicrobials in dentistry. Here’s what we found.

For over five millennia, people across the Indian subcontinent chewed neem twigs (datun) to clean their teeth. Every generation assumed the next one would discover it was folk superstition.

Instead, a 2014 study in the Journal of Clinical and Diagnostic Research tested neem sticks against Streptococcus mutans, the primary bacterium behind dental cavities. The result: neem demonstrated “significantly higher antimicrobial activity” compared to controls (PMID: 25177629).

The “primitive” toothbrush your ancestors used was delivering clinically measurable antimicrobial action against the exact bacterium that causes cavities. For five thousand years. Without a clinical trial to tell them so.

Here’s the one that changed how we think about oral care.

A 90-day clinical trial (PMC7595480) tested neem gel head-to-head against 0.2% chlorhexidine gel, the strongest antiseptic your dentist can prescribe. Over three months of daily use, neem demonstrated equivalent antimicrobial efficacy.

The difference? Chlorhexidine causes tooth staining, altered taste, and mucosal irritation with prolonged use. Neem caused zero adverse effects.

Same efficacy. Better safety profile. Over a 90-day period, not a one-week snapshot.

We found 9 peer-reviewed studies total on neem in oral care. Some are incremental. These two aren’t. A 5,000-year practice validated by microbiology, and a clinical trial showing equivalent efficacy to the pharmaceutical gold standard without the side effects, that’s a signal worth following.

We just published our full investigation covering all 9 studies, from selective antimicrobial activity (neem kills pathogens while preserving beneficial bacteria) to nanoparticle formulations, plus a head-to-head comparison of the two best toothpaste tablets using these findings.

→ Read the full investigation: Neem in Oral Care. 5,000 Years of Wisdom Meets Modern Science (2026)

Thanks for reading. If you found this useful, share it with someone who’s curious about the science behind what they put in their mouth every morning.

Elyvora US is an independent product research publication operated by FLASH SHIP SRL, based in the EU. No brand affiliations, no sponsored content, no free products accepted.