What to Look for in Non Toxic Candles

When we light a scented candle, we do so to add scent to a room, to shift the atmosphere, to soften a space. But that’s not the only thing that changes.

The composition of the air you’re breathing shifts too.

It’s why more people are beginning to look for non toxic scented candles. Not out of alarm, but out of awareness. Because if a candle is something you return to daily, something that shapes how your home feels, it’s only natural to ask what sits behind it.

So what actually makes a candle toxic or non-toxic? And what should you be paying attention to?

Are Scented Candles Toxic? 

This is one of the most common questions, and the answer is not a simple yes or no.

Some candles can release unwanted compounds when burned, particularly those made with paraffin wax, synthetic dyes, and lower-quality fragrance blends. Others are designed to burn more cleanly, using better materials and more considered formulations. In that sense, they sit alongside other everyday choices, like lighting a fire or painting a room, where materials matter, but aren’t always front of mind.

So rather than asking whether all candles are toxic, a better question is:

What should you actually look for in a non toxic candle?

It comes down to three key elements: the wax, the fragrance, and the wick. Each plays a role in how a candle behaves once lit, and a truly non toxic scented candle is made from materials chosen as much for how they burn as how they smell.

The best non toxic scented candles are not defined by a single feature, but by a combination of thoughtful decisions. They prioritise transparency, clean-burning materials, balanced fragrance, and simplicity where it matters.

What Wax Are Non-Toxic Candles Made Of?

Paraffin wax remains one of the most commonly used materials in candle making. It is inexpensive and effective, but it is also a by-product of petroleum.

Often, it appears in blends, sometimes labelled in ways that foreground more natural ingredients such as soy, making it less obvious what proportion is actually being used. A “soy wax blend” can, in reality, still be largely paraffin.

More considered alternatives include plant-based waxes such as soy wax, coconut wax, rapeseed, or apricot wax. These are renewable and tend to burn more cleanly.

But even here, labels like 100% natural can be misleading if they are not backed by transparency. Because not everything natural is automatically better.

Why Wax Choice Matters More Than You Think

Plant-based waxes such as soy and coconut are often associated with clean burning candles, and for good reason. They tend to burn more evenly, produce less visible soot, and create a more stable, consistent burn.

But not all waxes are equal.

Take soy, for example. Its rise in popularity has driven demand, which in some cases has contributed to deforestation and intensive farming practices. Large-scale production can involve genetic modification or chemical treatment to maximise yield.

At Ouverture London, we use ProTerra-certified soy wax, ensuring it is non-GMO and responsibly sourced. It is a quieter distinction, but one that matters when considering what sits at the core of a non toxic candle. It also offers a longer, more even burn time compared to paraffin.

There is also the question of dyes. Many candles use dyes to achieve bright whites or deep colours. Our candles are free from dyes, which means natural variation, from soft cream to warmer tones. It may not be perfectly uniform, but it reflects what is, and isn’t, in the candle.

Are Beeswax Candles the Best Natural Option?

A beeswax candle is often seen as the most natural choice, and in many ways it is.

It burns slowly, has a subtle honeyed scent, and requires minimal processing. But it is not without its considerations.

Sourcing can vary, particularly at scale, and ethical questions can arise. After all, bees produce wax for their own ecosystem. It also carries a natural scent, which can influence or limit how fragrance is experienced.

For those looking for more layered or transportive scents, this can be a constraint, which is why beeswax often works best in non scented candles.

So while beeswax is a strong option, it is not the only one, and not always the most adaptable.

Natural vs Synthetic Fragrance: What Actually Matters

There is a growing preference for non toxic essential oil candles, often made with 100% essential oils or organic essential oils, seen as the safest or cleanest option.

But the reality is more nuanced.

Nature itself is not inherently safe. Cyanide is natural, and also highly toxic. Essential oils are complex chemical compositions, and while many are beautiful, some can be sensitising or unstable when exposed to heat.

So the distinction between natural and synthetic is not the most important one.

What matters is whether a fragrance has been designed to perform well when burned. Whether it avoids unnecessary additives, and whether it remains stable and balanced once lit.

There is also the role of binding agents, which allow fragrance and wax to work together. One of the most widely discussed categories is phthalates, some of which have been linked to potential health concerns.

At Ouverture London, our candles are phthalate-free, as well as free from sulphates and parabens. Not as a headline claim, but as part of a broader approach to formulation.

The best non toxic candle brands do not rely on labels alone. They focus on how everything works together.

Wicks: The Detail Most People Overlook

The wick is one of the most important, and most overlooked, parts of a candle.

Historically, some wicks contained metal cores, including lead, to help them hold their shape. While lead is no longer standard, metal can still be found in some wicks, and this continues to shape concerns around toxic candles.

A well-made candle should use natural fibres that burn cleanly and evenly. At Ouverture London, we use unbleached linen and cotton wicks, avoiding both metal and bleaching processes.

This allows for a more stable flame, a cleaner burn, and a more consistent release of scent. It is a small detail, but central to creating a candle that feels considered from the inside out.

Are There Eco-Friendly Alternatives to Scented Candles?

There are alternatives, from reed diffusers to incense, each with their own qualities and considerations.

But candles remain one of the most accessible and enduring ways to shape atmosphere. There is something elemental about them, something humans have been drawn to for centuries.

Which is why the focus has shifted, not towards replacing them, but towards making them better.

Where Ouverture London Sits

Ouverture London creates fragrance with a sense of place, built on the understanding that through scent we connect to landscape, culture, and ritual - and we honour that by creating respectful products, both for person and planet.

We are not perfect, and we are always evolving. But each decision is made with the intention of creating something that feels as good in a space as it does to use.

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Quick answers: Non-Toxic Candles

What makes a candle non toxic?

A non toxic candle is usually made with cleaner-burning wax, a safe wick, and fragrance that has been formulated without unnecessary additives such as phthalates, dyes, or heavy metals. The best non toxic candles are transparent about their wax, wick, and fragrance, rather than relying only on words like “natural” or “clean.”

Are scented candles toxic?

Not all scented candles are toxic. Some candles can release unwanted compounds when burned, especially if they are made with paraffin wax, synthetic dyes, metal-core wicks, or lower-quality fragrance blends. Better-made scented candles use clean-burning waxes, natural fibre wicks, and carefully formulated fragrance.

What is the safest wax for candles?

Plant-based waxes such as soy wax, coconut wax, rapeseed wax, and apricot wax are often considered cleaner alternatives to paraffin. However, sourcing matters. At Ouverture London, we use ProTerra-certified soy wax, which is non-GMO and responsibly sourced.

Are soy candles non toxic?

Soy candles can be a good non toxic candle option, but not all soy wax is the same. Some soy is genetically modified or produced through intensive farming. Look for certified, non-GMO soy wax and avoid candles with dyes, phthalates, or unclear wax blends.

Are beeswax candles better than soy candles?

Beeswax candles are natural, slow-burning, and often a good choice for unscented candles. However, beeswax has a natural honeyed scent, which can limit more complex fragrance blends. It may also raise ethical or vegan concerns depending on sourcing. Soy wax can offer a more neutral base for scented candles.

Are essential oil candles safer?

Essential oil candles are not automatically safer. Essential oils are natural, but natural does not always mean harmless. Some essential oils can be sensitising or unstable when heated. What matters is whether the fragrance has been designed to burn safely and cleanly in a candle.

What wick should a non toxic candle have?

A non toxic candle should use a natural fibre wick, such as cotton, linen, or wood, rather than a metal-core wick. Ouverture London uses unbleached linen and cotton wicks, avoiding metal and bleaching processes.

Do non toxic candles smell strong?

A good non toxic scented candle should smell balanced rather than overpowering. Strong scent is not always a sign of quality. The best candles release fragrance steadily and cleanly, creating atmosphere without overwhelming the room.

Are there eco-friendly alternatives to scented candles?

Yes. Reed diffusers, wax melts, incense, and room sprays can all be alternatives to scented candles. Each has its own considerations, so the best choice depends on whether you want flame, fragrance throw, longevity, or ease of use.