— THE BIO. STANDARD
The bio.
Standard.
Most dental devices are manufactured from thermoplastic polymers. Most manufacturers have never published any data on what those materials shed during wear. bio. considers this unacceptable.
— WHY THIS MATTERS
8 hours every night.
For years.
A retainer is in your mouth overnight, in close contact with saliva and mucous membrane, every night — often for a decade or more. The total material exposure per retainer exceeds almost any other personal care product.
No brand asked the question. We did. And then we published the answer.
— THE CLAIM
"bio. retainers are the only retainers in the UK independently tested for microplastic particle release and confirmed free from harmful microplastics."
This is not a marketing claim. It is a published scientific result. No other retainer brand in the UK has published independent third-party testing data for microplastic particle release — not from dental practices, not from DTC brands, not from the biggest names in the category. They could test theirs. They choose not to.
— THE BIO. MATERIAL DIFFERENCE
What bio. is made of.
Most dental device brands never disclose their materials. We built the opposite model: every substance disclosed, every claim tested, every result published.
100% Microplastic-Free
No unstable plastics that fragment and leach into your body over time. bio. materials are independently tested for microplastic particle release under simulated wear conditions — confirmed below detection limits.
I
Advanced Organic Polymers
Formulated from biocompatible organic polymers derived from plant-based sources. Extreme durability, long-term safety. Full polymer composition disclosed by FTIR spectroscopy — a standard no other UK brand meets
II
Independently Tested
Every production batch tested by an ISO 17025-accredited laboratory. Results for BPA, BPS, BPF, phthalates, heavy metals, and microplastic release published in full by lot number. Re-tested on every new production run.
III
— TESTING PROTOCOL
Our testing protocol.
The bio. Standard is our public material testing protocol. Every product we sell is independently tested by an ISO 17025-accredited laboratory. Every result is published in full below, referenced by product lot number and test date.
If we don't know something, we say so. If we can't support a claim, we don't make it.
— PUBLISHED RESULTS
Published results.
Results referenced by product, lot number, and test date. Re-tested on every new production batch.
Reports will be linked directly as PDF downloads once in Lot numbers and dates updated with every new production run.
— THE PLAIN STATEMENT
"bio. retainers are the only retainers in the UK independently tested for microplastic particle release and confirmed free from harmful microplastics."
The data is above. No other retainer brand in the UK has published equivalent independent testing data for microplastic particle release. They could test theirs. They choose not to.
Questions about our testing methodology? Contact hello@bio.uk — we will answer directly.