Are Beeswax Candles Healthy? A Scientific Look at What You’re Breathing

Many people ask are beeswax candles healthy compared to paraffin candles, particularly when thinking about indoor air quality and what substances are released when candles burn.

Candles are often associated with calm evenings, warm lighting, and relaxation. But there’s an important question most people never ask:

What exactly enters the air when a candle burns?

When you light a candle, you’re not just creating light. You’re triggering a small chemical reaction happening continuously in your living room.

The type of wax used in a candle—whether paraffin, soy, or beeswax—can influence how cleanly that reaction occurs.

To understand why beeswax candles are often considered a cleaner option, we first need to understand what is actually happening inside the flame.

What Actually Burns in a Candle?

Most people assume that the wick is burning. Surprisingly, that’s not what fuels the flame.

The wick’s real job is to act like a tiny straw.

When you light the candle, the flame melts the wax around the wick. The melted wax then travels up the wick through a process called capillary action.

If that term sounds unfamiliar, imagine dipping the corner of a paper towel into a glass of water. You’ll see the water slowly creep upward through the fibres. That same process is happening inside the wick.

As the wax reaches the flame it vaporises—it turns into an invisible gas.

That wax vapour is what actually burns.

Think of the candle flame like a miniature oil lamp. The wax is essentially acting as the fuel.

During this burning process, the wax molecules react with oxygen in the air. In an ideal situation this reaction would produce only two things:

• Carbon dioxide (CO₂)

• Water vapour

But real flames are messy.

When combustion is incomplete, other substances can form, including soot and volatile organic compounds.

Figure 1. Diagram illustrating how a candle burns. Melted wax is drawn up the wick by capillary action, where it vaporises and combusts in the flame.

Figure 2. Illustration of capillary action in a candle wick. As wax melts, it is drawn upward through the wick fibres by capillary forces, similar to how water moves through a paper towel. This continuous supply of liquid wax allows the flame to burn steadily.

What Are Volatile Organic Compounds (VOCs)?

You’ll often hear scientists mention VOCs when talking about air quality.

The name sounds complicated, but it simply means:

Organic chemicals that easily evaporate into the air.

“Organic” in chemistry doesn’t mean natural food-store organic. It means carbon-based molecules.

Examples of VOCs include compounds like:

• benzene

• toluene

• formaldehyde

These chemicals are released by many everyday products, including:

• paints

• cleaning products

• car exhaust

• some candles

Because VOCs easily enter the air we breathe, they are often studied in relation to indoor air quality.

Research has shown that paraffin candles can release small amounts of VOCs such as toluene and benzene during combustion (Krause et al., 2009).

To put this into perspective, the amounts released by a single candle are typically very small, but they can accumulate if many candles are burned in a poorly ventilated room.

What Is Paraffin Wax?

Paraffin wax is the most common candle wax in the world.

It is produced during crude oil refining, the same industrial process used to create fuels like petrol and diesel.

During oil refining, heavy waxy molecules are separated and purified into the white solid wax that becomes paraffin.

Chemically, paraffin consists mainly of long chains of carbon and hydrogen atoms called alkanes.

You can imagine these molecules as tiny strings of carbon atoms with hydrogen atoms attached along the sides, somewhat like a microscopic caterpillar.

When paraffin burns, those chains break apart and react with oxygen.

Ideally they form carbon dioxide and water, but in real flames the breakdown can produce additional intermediate compounds, which is why paraffin candles may emit small quantities of VOCs.

What Is Beeswax Made Of?

Beeswax has a completely different origin.

It is produced naturally by worker honeybees, which secrete wax scales from glands on their abdomen. The bees then chew and shape these scales to build the hexagonal honeycomb structures inside the hive.

From a chemical perspective, beeswax is much more complex than paraffin.

Instead of being mostly hydrocarbons, beeswax contains a mixture of:

• fatty acid esters

• long-chain alcohols

• natural hydrocarbons

• trace aromatic compounds

(Patil et al., 2017)

If paraffin is like a simple chain molecule, beeswax is more like a mixture of natural building blocks produced through biological processes.

These compounds influence how the wax melts and burns.

Figure 3. Simplified comparison of the molecular structures of common candle waxes. Paraffin wax consists mainly of long-chain hydrocarbons derived from petroleum, whereas beeswax is composed primarily of long-chain fatty acid esters produced naturally by honeybees.

This difference in chemical composition is one of the reasons people researching whether beeswax candles are healthy often compare them directly with paraffin candles.

Why Some Candles Produce Black Smoke

You may have noticed that some candles produce black smoke or dark marks on walls.

That black residue is soot.

Soot consists of extremely tiny carbon particles produced when fuel burns incompletely.

To visualise soot formation, imagine trying to burn a log of wood in a fire with very little oxygen. Instead of burning cleanly, the wood smokes and produces dark particles.

Something similar happens when a candle flame becomes unstable.

Several factors can increase soot production:

• a wick that is too long

• air drafts causing the flame to flicker

• waxes that burn less efficiently

Research into candle emissions has shown that paraffin candles can produce measurable quantities of ultrafine soot particles (Fine et al., 1999).

These particles are incredibly small—often thousands of times thinner than a human hair—and can remain suspended in indoor air.

Why Beeswax Often Burns More Cleanly

Beeswax candles are often described as clean burning, and there are several reasons why.

First, beeswax has a higher melting point, usually around 62–65°C. In practical terms, this means the wax melts more slowly.

A slower melt rate often results in a more stable flame.

Second, beeswax contains oxygen-rich compounds such as esters and fatty acids. These can help the wax burn more completely compared with pure hydrocarbon waxes.

Studies comparing wax types have found that natural wax candles can produce less soot under similar conditions (Jetter et al., 2002).

This doesn’t mean beeswax produces zero emissions—any flame produces some by-products—but the combustion tends to be relatively clean when the candle is properly made.

The Myth of “Air Purifying” Beeswax Candles

You may have seen claims that beeswax candles purify the air by releasing negative ions.

Negative ions are particles with an extra electron, giving them a small electrical charge.

They occur naturally in environments such as:

• waterfalls

• ocean waves

• thunderstorms

These charged particles can interact with dust and airborne particles.

However, there is currently little strong scientific evidence showing that beeswax candles generate enough negative ions to significantly purify indoor air.

Most research on air purification using ions involves electrical ioniser devices, not candle flames.

So while beeswax candles burn relatively cleanly, the idea that they actively purify air is likely exaggerated.

Why Wick Quality Matters

The wick plays a surprisingly important role in how cleanly a candle burns.

If the wick is too large, it pulls up too much wax, producing a large unstable flame. This increases soot production.

If the wick is too small, the candle may tunnel or burn unevenly.

In the past, some candles used lead-core wicks to keep them upright. These were banned in many countries after studies showed they could release lead particles when burned.

Today most candles use braided cotton wicks or wooden wicks, which burn much more cleanly.

Fragrance Oils and Candle Additives

Many candles contain synthetic fragrance oils.

These compounds evaporate when heated and produce the strong scents people associate with scented candles.

However, when fragrance chemicals react with ozone present in indoor air, they can form secondary pollutants such as formaldehyde (Salthammer et al., 2010).

This doesn’t mean scented candles are dangerous, but it does mean that simpler candles with fewer additives generally produce fewer emissions.

Because beeswax has a naturally mild honey aroma, it often requires little or no added fragrance.

The Importance of Ventilation

Even the cleanest candle should ideally be burned in a well-ventilated room.

Ventilation helps disperse any combustion by-products before they accumulate.

A simple way to imagine this is thinking about cooking in a kitchen.

If you fry food in a sealed room with no ventilation, the air quickly becomes smoky. Turn on a vent or open a window, and the smoke disperses much faster.

The same principle applies to candle use.

Environmental Perspective

Another difference between candle types relates to how the wax is produced.

Paraffin originates from fossil fuels, which are non-renewable resources.

Beeswax, on the other hand, is produced naturally by honeybees during honeycomb construction.

Beekeeping plays a vital role in supporting pollination. According to the Food and Agriculture Organization, roughly 75% of global food crops depend at least partly on pollination (FAO, 2018).

Supporting beekeepers through beeswax products indirectly contributes to maintaining these pollinator populations.

So Are Beeswax Candles Healthier?

Based on current research, beeswax candles offer several potential advantages:

• natural renewable material

• fewer additives compared with many scented candles

• relatively low soot production under proper burn conditions

• support for beekeeping and pollination

All candles release some by-products when burned, but the simplicity and natural composition of beeswax make it one of the cleaner-burning wax options available.

At DC Hive Products, we take pride in making candles that reflect the natural qualities of beeswax itself. Each candle is carefully hand-poured using pure beeswax sourced from our own hives, ensuring a clean, slow burn and a warm natural glow. We avoid unnecessary additives, and when we do offer scented candles they are made only with 100% pure essential oils, never synthetic fragrance oils. The goal is simple: well-made, honest candles that burn beautifully while staying as close to nature as possible.

References

Fine, P. M., Cass, G. R., & Simoneit, B. R. T. (1999). Characterization of fine particle emissions from burning candles. Environmental Science & Technology, 33(14), 2352–2362.

Jetter, J., Guo, Z., McBrian, J., & Flynn, M. (2002). Characterization of emissions from burning incense. Science of the Total Environment, 295(1–3), 51–67.

Krause, C., et al. (2009). Candle emissions and indoor air quality. South Carolina State University Study.

Patil, S. B., et al. (2017). Beeswax: Production, composition, properties and uses. Journal of Food Science and Technology.

Salthammer, T., Mentese, S., & Marutzky, R. (2010). Formaldehyde in the indoor environment. Chemical Reviews, 110(4), 2536–2572.

Food and Agriculture Organization (FAO). (2018). Pollination services for sustainable agriculture.