Reverse osmosis membranes can reduce fluoride, but actual performance depends on the membrane, system design, operating conditions and maintenance.
Look beyond the headline
If fluoride reduction is the reason you are considering RO, check for model-specific test data or certification that covers fluoride. A generic statement about “RO” is less useful than evidence for the exact appliance.
UK context
Water composition varies by supply area. Check your water supplier's current information if you want to understand what is present in your tap water before choosing a treatment method.
Related
See what reverse osmosis is and our broader RO buying guide.