Nobody told you that the bristles on your toothbrush are plastic. Nobody told you they shed. And nobody calculated what two minutes of microplastic contact with your oral mucous membranes, twice a day, for decades, actually adds up to.

The number Primals puts on it: 2.3 million microplastic particles per year, eliminated by switching to natural bristles. That's not a rounding error. That's the difference between a daily oral care routine and a daily exposure event.

Boar hair has been used for brushing tools for centuries — long before nylon was synthesized to replace it in the name of cost efficiency. It's naturally firmer than horse hair, which means it does more work against plaque, stain, and buildup than a softer bristle can without additional pressure. For people who prefer a thorough, substantive clean over a gentler touch, boar is the right choice. The bristle has a slight natural taper, which helps it reach between teeth more effectively than the uniform cut of a synthetic bristle.

The bamboo handle is completely free of synthetic glue and coatings — fully biodegradable end-to-end, including the packaging. No BPA, no phthalates, no PFAS. Nothing that accumulates in tissue, disrupts hormones, or contributes to the 50 billion pieces of plastic toothbrush waste generated globally each year.

If you want the most effective clean available without any of the synthetic inputs, this is it.

4 Pack — Pure boar hair bristles — Bamboo handle — Fully biodegradable