Does a non-toxic candle exist?
I make candles, and I'm still going to start here: no, a completely non-toxic candle doesn't exist. Anything that burns gives something off. The French public health portal Santé.fr notes that burning candles releases fine particles and compounds such as benzene and formaldehyde.
What does exist are candles that pollute far less than others. The difference comes down to four manufacturing choices, almost all of which you can check on the label: the wax, the wick, the fragrance and how cleanly it burns.
Paraffin, soy, rapeseed or sunflower: which wax?
This is the first criterion, and the one that matters most for soot.
| Wax | Source | What to know |
|---|---|---|
| Paraffin | Petroleum | The most common and cheapest, linked to black marks on walls |
| Soy | Plant | Often imported, from intensive monocultures |
| Rapeseed | Plant | Grown in Europe, often blended with other waxes |
| Sunflower | Plant | Slow burn; ours comes from European crops |
| Palm | Plant | Linked to deforestation, best avoided |
A common trap: the phrase “made with plant wax”. It doesn't say how much of the blend is plant-based, and the rest may be paraffin. Look for a named wax, ideally 100% plant.
I go into how they burn in my article on sunflower wax versus paraffin candles.
The wick: the part nobody looks at
Some wicks have a metal core to keep them upright. Check that it is free of lead and zinc: if the label doesn't say, ask the maker.
Cotton and wood are the two simplest choices. I chose cherry wood: it burns evenly, with a wide flame and a gentle crackle, and it contains nothing but wood.
Fragrance: phthalates, CMRs and essential oils
Fragrance is what we choose first and check least. Two claims are worth looking for: “phthalate-free” and “CMR-free”, meaning no substances classified as carcinogenic, mutagenic or toxic to reproduction. Our fragrances are created in Grasse and meet both.
What about essential oils? “Natural” doesn't mean harmless once heated. A burning essential oil also releases compounds into the air, and some contain allergens. It isn't a bad choice, but it isn't a guarantee either.
Soot: the test you can do at home
A well-made candle, used well, produces very little soot. If you see black smoke or a flickering flame, it almost always comes down to three things:
- A wick that is too long: trim it to 3 or 4 mm before each lighting.
- A draught: a window ajar, a door, a vent. Move the candle.
- A candle burning too long: beyond three or four hours, the wick starts to carbonise.
The same three habits also make a candle last much longer: I explain them in how to make a candle last twice as long.
Habits that matter as much as the candle
The best candle in the world, burning in a closed bedroom all evening, is still a flame in a closed room. Public health advice is simple, and I follow it at home:
- Air the room after use, windows wide open, for at least ten minutes.
- Avoid lighting candles around the most sensitive people: babies and young children, pregnant women, older people or anyone with breathing problems.
- Don't burn several candles or incense at once in the same room.
- Put it out with a snuffer or by dipping the wick into the melted wax, rather than blowing: you avoid the plume of smoke.
The checklist to keep in mind before buying
| Point | Look for | Avoid |
|---|---|---|
| Wax | 100% plant, named | Paraffin, “made with” |
| Wick | Cotton or wood, lead-free and zinc-free | Unspecified metal core |
| Fragrance | Phthalate-free, CMR-free | “Fragrance” with no detail |
| Container | Thick, reusable glass | A container that overheats or cracks |
| Making | An identifiable workshop | No stated origin |
My candle ticks these boxes, and I still won't tell you it purifies your living room. I'll tell you it is made to burn cleanly, for a long time, and so that you know exactly what is in it.
