The Great Debate: Should We All Switch to a Fluoride-Free Toothpaste?

fluoride-free toothpaste-dentist-debate

Welcome to Byrdie UK's Wellness Week. Over the next seven days, you'll get to read about how to make your body, mind and, well, your life more balanced. We know it's not January, but wellness has become an all-year-round focus for many, and with autumn on the way (read: cold and flu season), now seems like a good time to talk about not just keeping well but boosting our wellness from all angles. From the best tech to improve your health to the small tweaks anyone can do to bring you more happiness, we've thought about everything you might want to factor a little more wellness into your life with ease. Today, we have two dentists debating the pros and cons of fluoride-free toothpaste.

Girlfriend Collective

Have you ever thought about switching to fluoride-free toothpaste? I have. Mostly when I had acne and found myself down a Google black hole, reading on forums that people were blaming fluoride for their hormonal breakouts. Fluoride is used in toothpaste to strengthen the teeth and prevent cavities. Despite murmurs that fluoride is bad for our health, there’s little concrete evidence out there to corroborate the need to switch to fluoride-free toothpaste. To try and get to the bottom of it, I spoke to two dentists to find out whether we should make the switch. I also sent them the ingredient lists for three alternative fluoride-free toothpastes to review.

Check out what they had to say on the notoriously divisive subject.


Harvey Grahame, BDS, clinical director at, isn’t convinced by fluoride-free toothpaste, and that’s putting it mildly: “I am really skeptical of these expensive, beautifully packaged products that have little or no science behind them. They have removed all the active ingredients responsible for the huge improvements we see in dental health and replaced them with exotic sounding oils!”

According to Grahame, when the bacteria in dental plaque reacts with the sugar in our diet, it produces acid that is damaging to the teeth and enamel. Fluoride is added to toothpaste to strengthen the teeth, thus preventing potential damage.

“In theory, if we ate no sugar and kept our teeth 100% plaque-free, there would be no need for fluoride in our toothpaste, as there would be no bacteria or food to cause damage,” says Grahame. “In practice, this does not happen, which is why there has been around a 25% reduction in the levels of dental decay since the introduction of fluoride toothpaste.”

I sent Grahame the ingredient list for the three fluoride-free toothpastes by brands Lebon, Buly and Aesop (pictured above). Unsurprisingly, the feedback wasn’t positive. “They probably taste great and have a wonderfully exotic list of ingredients, but I am really struggling to say anything positive about them other than, having googled them, they have great boxes!”

If you’re set on making the switch to fluoride-free regardless, of the three options, Grahame preferred Aesop’s offering, “It has a detergent and active ingredients that will stop plaque redeveloping, possibly reduce gum inflammation and remove stains.”


On the flip side, Giacomo Favero, cosmetic dental surgeon, clinician and researcher, isn’t convinced fluoride is great for our health. “Fluoride [in toothpaste] is a chemical mixture that contains a wide array of chemicals, putting this substance in category 4 of the hazardous materials scale. This is the highest and most dangerous rating a substance can receive.

Meet the Expert

Dr. Giacomo Favero is a London-based dental surgeon with more than 15 years of professional experience. He is a registered member of the Order of Odontological Doctors of the province of Treviso, and has published many academic studies in the field of dentistry.

“Fluoride is believed to be useful to protect against dental cavities, but if we look at the science on fluoridation, there are many controversies. And the research on fluoride is mixed as far as the benefit. If you look closely at the studies, and you combine them all together, I am convinced that if there is a benefit, it’s no longer there, in part because we’re ingesting too much fluoride.

“We’re getting two to three times more than what is written in the toothpaste dosage direction; dosage should be the size of a pea. Too much fluoride can cause dental (discolouration of teeth) and skeletal fluorosis (dense, brittle bones),” adds Favero. “Customers are increasingly looking for less harmful products, and it’s about time the industry delivers.”

Interestingly, Favero suggests that our dental problems can also be indicators of wider health issues. “Stress can affect dentinal and salivary flow with over-production of cortisol. Hormonal shifts such as low thyroid activity, pregnancy, teenage years, and growth spurts in children can affect dentinal and salivary flow and make teeth susceptible to decay,” he says.

The Final Takeaway

Both Grahame and Favero make good cases for and against fluoride, so what to do? Favero believes, in some cases, fluoride toothpaste should be used. “Individuals who experience early stages of decay, or who have cavities forming, should be sure to have daily exposure to topical fluoride using only a pea dose, and they must not swallow it,” he says.

I’m personally one of those people who, despite how much I brush and floss, grows plaque like it’s going out of fashion. I need the fluoride to help protect my teeth, but I’ve been introducing these fluoride-free toothpastes a few times a week just to try and reduce my fluoride intake.

Lebon Sweet Extravagance Toothpaste (with rose, orange blossom and mint) tastes incredible, while the Aesop and Buly offerings taste good and look incredibly chic. If you’re not prone to plaque and never need fillings, you could make the switch and see how you get on. While the dentists disagree on the use of fluoride, they are aligned that the Aesop toothpaste offers the best combination of ingredients, making it a good place to start.

Up next: These are the tried-and-true teeth whitening techniques that actually work, according to experts.

Article Sources
Byrdie takes every opportunity to use high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial guidelines to learn more about how we keep our content accurate, reliable and trustworthy.
  1. Medjedovic E, Medjedovic S, Deljo D, Sukalo A. Impact of fluoride on dental health qualityMater Sociomed. 2015;27(6):395-398. doi:10.5455/msm.2015.27.395-398

Related Stories