Perhaps you haven't escaped it yourself.
During a family meal or a gathering with friends, just as you take out your e-cigarette, someone makes a comment:
"Oh yes, but it's now proven — vaping destroys your lungs! It even causes serious and irreversible diseases."
No sources. No recent studies cited. Just a statement left hanging there, categorical and vague, that has almost become a widely held opinion and popular truth. But where does this misconception come from? Is there a grain of truth in these alarming claims? And above all, what is the actual situation in 2026?
Diacetyl: a poison?
Diacetyl, or 2,3-butanedione, is a compound well known to the food industry. It is naturally present in many foods, particularly in butter, cheese and beer. It is even used as a flavouring agent, for its creamy, slightly buttery aroma.
Harmless when ingested, diacetyl can become problematic when inhaled repeatedly, particularly in vaporised form. This is what was demonstrated by the cases of obliterative bronchiolitis that appeared among workers in popcorn factories in the United States in the 2000s.
The disease, nicknamed "popcorn lung", is serious but very rare. And above all, it appeared in contexts of intense and prolonged exposure, with no protection whatsoever.
A controversy that is still ongoing… but 10 years behind the times
The link between diacetyl and e-liquids was raised as early as 2014. At the time, a study by Dr Farsalinos revealed that 74.2% of e-liquids tested from around the world contained traces of diacetyl, particularly in sweet and dessert flavours. Worse still, around 45% of his e-liquids contained concentrations above the recommended exposure limits. What was the origin of his e-liquids? The study does not say.
But the essential point is often overlooked:
The measured concentrations were 10 to 100 times lower than those found in traditional cigarette smoke.
Read the study (in English) here and here too
In other words: at the time, vaping already contained far less diacetyl than tobacco. And since then, things have changed considerably.
A debate resurfacing amid the controversy over flavourings
So why are we talking about it again today?
Recently, certain media outlets and public figures have published anxiety-inducing articles claiming that e-cigarettes are directly responsible for serious lung diseases in young people. They implicate diacetyl, without citing any studies, documented cases, or even measured concentrations.
Coincidence? These publications come in the midst of the debate on banning flavourings in vaping, wrongly accused of attracting young people.
In this tense climate, dredging up an old controversy makes a powerful impact on public opinion… even if reality no longer matches the claims being made.
The vaping industry mobilised for years to ban diacetyl
The vaping industry's reaction to the 2014 study was swift and exemplary.
From the very first warnings, French and European manufacturers worked to remove diacetyl from their formulas, while seeking safer aromatic alternatives.
The turning point came with the creation of quality standards, such as the AFNOR certification (XP D90-300-2), which requires:
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0 mg of diacetyl
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0 mg of acetoin
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0 mg of acetyl propionyl
These three compounds, suspected of being irritants to the respiratory tract, are now strictly absent from certified e-liquids.
Today, French laboratories systematically and rigorously test for the absence of these molecules. The result: e-liquids sold in France are among the most strictly controlled in the world.
How can you avoid any trace of diacetyl in your e-liquid?
To vape with complete confidence, a few simple habits are all you need:
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Choose e-liquids manufactured in France or Europe.
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Look for the presence of quality certifications or labels (AFNOR, ISO, etc.).
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Avoid dubious e-liquids or those with no traceability, particularly those bought from foreign websites.
By following these tips, you ensure you are vaping a diacetyl-free product, designed in compliance with current standards.
Le Vapoteur Discount: a long-standing commitment to quality
At Le Vapoteur Discount, we make it a point of honour to offer you reliable, traceable and safe e-liquids.
✔️ All products sold on our website strictly comply with European regulations (TPD) and benefit from laboratory testing.
✔️ We work directly with manufacturers to guarantee the absence of controversial substances such as diacetyl.
✔️ And of course, we favour French and European brands recognised for their rigour.
Our mission: to offer you the best of vaping, without compromise on safety or quality.
Let's stay vigilant, but informed
Diacetyl was a cause for concern more than 10 years ago, thanks to a study that helped the vaping market improve.
Today, the reality is quite different:
Rather than giving in to unfounded fears, let us continue to stay informed with discernment.
Also discover our dedicated articles on heavy metals in vaping and the importance of regularly changing your coil, as well as the full list of ingredients to avoid in your e-liquids.
