Non-toxic candles: what the label means and what to buy

The honest starting point

There is no such thing as a candle that gives off nothing. A flame is combustion, and combustion produces byproducts; the US Environmental Protection Agency's review of candles and indoor air notes plainly that burning candles can be a source of particulate matter. Anyone selling a candle with zero emissions is selling a claim, not a candle.

That does not make candles dangerous, and it does not make every candle the same. What varies — a lot — is what the wick is made of, what the wax is, how much fragrance has been added and how the candle is burned. Those four things are what the non-toxic label is trying, and usually failing, to summarize. This page takes them one at a time, then lists the candles that handle all four well.

What non-toxic means on a label

Less than it sounds. There is no government certification behind the word on a candle. What exists is the Federal Trade Commission's Green Guides, which say a non-toxic claim is likely to be read as non-toxic for people and for the environment, and that a seller making it needs competent and reliable scientific evidence for both — or should clearly qualify the claim. Nobody checks that evidence before the word goes on the jar.

So treat non-toxic as the start of a question rather than the answer. The useful follow-up is always the same: which ingredient are you telling me about, and compared with what? A listing that names the wax, the wick and the fragrance has given you something to check. A listing that says non-toxic and nothing else has given you a conclusion without the evidence.

The four things you can actually control

1. The wick. Lead-cored wicks were the genuine hazard in this category, and the Consumer Product Safety Commission banned them in 2003 after determining that they could present a lead poisoning hazard to young children. The CPSC notes the alternatives most manufacturers use: zinc, synthetic fibers, cotton and paper. Wood wicks are a separate design. Whatever the material, a wick that is too long is what makes a candle smoke.
2. The wax. Beeswax, soy, coconut blends and paraffin all burn. We do not repeat the popular claim that paraffin releases dangerous toxins in normal use, because the evidence we could find does not support the strong version of it — our wax comparison sets out what does and does not stand up. What a named wax gives you is a label you can check.
3. The fragrance. This is the largest variable you can remove entirely. An unscented candle has one less set of ingredients in it than a scented one, which is why unscented beeswax leads this list. Where a candle is scented, a listing that names its fragrance standard — phthalate-free oil, for instance — is at least telling you something checkable.
4. How it is burned. The National Candle Association's guidance is to trim the wick to a quarter inch before lighting, burn for no more than four hours at a time, and keep the candle away from fans, air conditioners and open windows. A mushroomed wick and moving air are what put soot on the glass.

Why unscented beeswax leads this list

Beeswax barely holds added fragrance, so pure beeswax candles are unscented more or less by nature — what you smell up close is the wax itself, faintly of honey. That makes them the simplest possible answer for someone who wants the fewest ingredients in the room: wax, a wick and nothing else. Burned with a trimmed wick and out of drafts, beeswax puts very little visible soot on anything.

What we will not tell you is that beeswax cleans the air. That claim appears on a large share of beeswax listings and we could not find credible research behind it, so it stays off this page. The case for beeswax here is simpler and true: fewer ingredients, no added scent and a long, steady burn. The beeswax candles roundup has the full range if you want pillars or more tapers.

If they want scent

Some people want a room to smell of something, and an unscented taper will disappoint them however cleanly it burns. For them the goal is disclosure rather than zero: a blend whose components are named, like the coconut-beeswax jar here, or a soy candle whose listing states its fragrance oil standard, like the tin. Neither is scent-free and we do not pretend otherwise. Both tell you what is in them, which is the thing non-toxic on its own does not.

The trade-off is real. Pure beeswax holds very little fragrance, so any candle that fills a room with scent is carrying added fragrance by definition. Decide which matters more to the person you are buying for, and buy for that. The soy candles roundup covers scent throw properly.

When a flame is the wrong gift

For a household with a baby, a cat that walks on counters, or someone with asthma or another breathing condition, the right answer may be no candle at all — and that is a decision for the household, not for a gift page. The candle lovers page covers what to give someone who loves the idea of a candle but cannot have one burning.