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Does Reverse Osmosis Water Filter Remove Fluoride

How to Remove Fluoride from Drinking Water

By AllenPublished 29 days ago 4 min read
The image source is ITEHIL.

What is fluoride

Fluoride refers to compounds containing fluoride ions, including sodium fluoride, aluminum fluoride, etc. Fluoride is a chemical that occurs naturally in groundwater. It is a charged ion that is found in many natural minerals and rocks. Since it is easily soluble in water, has no odor or taste, and is not visible in solution, it is safe to drink in small amounts. However, in some cases, groundwater contains large amounts of fluoride, which is harmful to health. Excess fluoride in water can be removed through a reverse osmosis water filter.

Fluoride and the effects of water

  • Fluoride concentration:  Fluoride concentration that is too low cannot play a role in preventing tooth decay, while too high a concentration can cause fluorosis.
  • Individual differences:  Different individuals have different levels of sensitivity to fluoride, and some people are more susceptible to fluorosis.
  • Other factors:  Other substances in drinking water, such as calcium and magnesium, can also affect the effects of fluoride.

The effect of fluoride on water is twofold, with both benefits and drawbacks. The right amount of fluoride can prevent tooth decay, but excessive intake can cause fluorosis. Therefore, it is necessary to reasonably control the fluoride content in drinking water to ensure safety and health.

How to Remove Fluoride from Drinking Water

Several common methods can effectively remove fluoride from drinking water.

Activated carbon adsorption: Activated carbon is a highly porous material with strong adsorption capacity. Filtering drinking water through an activated carbon filter can effectively adsorb fluoride ions in the water, thereby reducing the fluoride content. This is a simple, economical, and common method of removing fluoride.

Reverse osmosis: Reverse osmosis is a method of filtering impurities from water through a semipermeable membrane. Reverse osmosis systems can remove a variety of contaminants from water, including fluoride. This method uses pressure to push water through a semipermeable membrane, while smaller solutes are retained on the membrane, thereby achieving the purpose of removing fluoride. Reverse osmosis systems are very effective, but due to the complexity of the equipment and the high price, they are relatively rare in-home use.

Ion exchange: Ion exchange is a method of removing impurities from water through resins. Ion exchange resins can selectively adsorb fluoride ions in water and release other cations. This method is often used in industrial water treatment, but can also be used in home water treatment systems.

Zeolite filter media: Zeolite is a natural mineral with strong adsorption capacity. Fluoride can be effectively removed from drinking water by passing it through a zeolite filter, a method also commonly used in household water treatment systems.

How do reverse osmosis systems filter fluoride?

Reverse osmosis is effective in removing fluoride from your water supply because fluoride molecules are larger than water molecules. RO systems not only remove fluoride, but they also remove several other contaminants from your water.

The RO system forces high water pressure through its semipermeable membrane, which has tiny pores that only allow water molecules to pass through. It blocks larger molecular contaminants like fluoride from passing further. It then drains the remaining contaminated tap water out of the reverse osmosis system.

This process is constantly happening in an RO system, with water entering its chamber and being forced through its membrane, while wastewater leaves the system through its drain. Fluoride molecules, like other contaminant molecules, are too large to pass through the semipermeable membrane of an RO system. Therefore, the system removes them along with most other contaminants present in regular tap water.

What are the benefits and drawbacks of fluoride in drinking water?


  • Preventing tooth decay: This is the main and most widely recognized benefit of fluoridating drinking water. Fluoride can strengthen tooth enamel and make it more resistant to acidic substances, thereby preventing tooth decay. Studies have shown that fluoridating drinking water can effectively reduce the incidence of tooth decay in children and adults.
  • Low cost: Compared with other oral health care measures, fluoridation of drinking water is a very cost-effective method that can benefit a large number of people, especially those who do not have access to regular dental care.
  • Lifelong benefits: People who are exposed to fluoridated drinking water from an early age can continue to benefit from the protective effects of fluoride on their teeth even if they stop drinking it as adults.


  • Dental fluorosis: This is the most common side effect of excessive fluoride intake, which manifests as white or brown spots on the surface of the teeth. Mild fluorosis usually does not affect the health of the teeth, but it may affect the appearance when it is severe.
  • Bone fluorosis: Long-term excessive intake of fluoride may cause bone fluorosis, which manifests as symptoms such as bone pain and joint stiffness. This condition is more common in areas where the fluoride content of drinking water is too high.
  • Other potential risks: Some studies have shown that excessive intake of fluoride may be associated with other health problems, such as hypothyroidism, neurological development problems, etc. However, these findings are controversial and need more research to confirm.

Overall, fluoridation of drinking water is a safe and effective way to prevent tooth decay. However, everything has two sides, and excessive intake of fluoride may bring some risks. Therefore, it is recommended to reasonably choose whether to drink fluoridated water and the amount of intake according to local water quality and personal situation under the guidance of professionals.

How to choose the right water filtration system?

You need to understand the pollutants in the local water quality to better choose a water filter. Generally, when purchasing a water filter, you need to consider its purification effect, maintenance cost, brand, after-sales service, filter element replacement cycle, etc. At present, the ITEHIL reverse osmosis water filter is the first choice for drinking water filtration. It uses PP cotton + activated carbon + reverse osmosis membrane filter element for multiple filtering, allowing you to get unlimited healthy drinking water. At the same time, the portable design allows you to use it anytime and anywhere.

Related Reading: Which filter is best for drinking water?

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About the Creator


Allen is a travel enthusiast and will write more articles related to business, travel, health, and fitness in the future.

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