TL;DR: Many scented candles and plug-in air fresheners release volatile organic compounds (VOCs) and synthetic fragrance chemicals, including phthalates, into the air you and your baby breathe. Babies are more sensitive to these airborne compounds because they breathe more air relative to their body weight than adults do. You don't have to give up a nice-smelling home — you just need to know what to look for (and what to skip) so your nursery air is as intentional as everything else you're choosing for your family.
You've already swapped the baby wash. You read the label on the lotion. And then you light a candle to make the nursery smell cozy for bedtime — because that's just what a nice home smells like, right? It's a fair question, and one that doesn't get nearly as much attention as ingredient lists on skincare products. If you've ever caught yourself wondering whether that candle or plug-in is undoing some of the other clean choices you've made, you're not overthinking it.
Why Are Babies More Sensitive to Airborne Fragrance Than Adults?
Babies breathe more air per pound of body weight than adults do, which means whatever is in the air of a room reaches their lungs in a higher relative dose. Their respiratory systems are also still developing, and their liver and kidneys — the organs responsible for processing and clearing out compounds the body absorbs — aren't yet working at full adult capacity. That combination is exactly why the same room freshener that barely registers for you can matter more for a baby who spends hours a day in that space, especially a nursery where a diffuser or candle might run every night.
What's Actually in a Scented Candle or Plug-In Air Freshener?
Most mass-produced scented candles are made from paraffin, a byproduct of petroleum refining. When paraffin burns, it can release volatile organic compounds (VOCs) — including acetone, benzene, and toluene — into the air. Researchers at Stanford have also found trace amounts of benzene and formaldehyde forming just above a burning wick. Plug-in and spray air fresheners work differently, but they're not necessarily cleaner: many rely on synthetic fragrance blends, and "fragrance" on a label can legally include phthalates, chemicals used to help scent linger in the air, without ever appearing by name on the ingredient list.
None of this means a candle or air freshener is inherently dangerous. It means the ingredients and how you use them both matter, the same way they do with anything else that touches your baby's world.
Does This Mean Phthalates Are in Every Air Freshener?
Not every air freshener contains phthalates, but studies analyzing air freshener and candle emissions have repeatedly detected them in products that never list them on the packaging, because fragrance formulas are protected as proprietary and don't require full ingredient disclosure. That's the same labeling gap that shows up in personal care products — "fragrance" is often a placeholder for a mixture a company doesn't have to break down for you.
Do Essential Oil Diffusers Solve the Problem?
Essential oil diffusers avoid paraffin soot and synthetic fragrance blends, which makes them a gentler option for most families. But "essential oil" doesn't automatically mean appropriate for a nursery. Some oils, like eucalyptus and peppermint, aren't recommended around infants and young toddlers, and even gentle oils can be overdone in a small, enclosed room with the door shut all night. If you use a diffuser, it's worth choosing infant-safe oils in a well-ventilated room and running it for set stretches rather than continuously through the night.
How Can You Freshen Your Home Without Compromising Air Quality?
A few adjustments make a real difference without asking you to give up a home that smells good:
Choose cleaner-burning candles. Soy, beeswax, or coconut wax with a cotton or wood wick burns with far fewer VOCs than paraffin, especially when scented with essential oils rather than synthetic fragrance.
Ventilate while you burn. Cracking a window or running an exhaust fan gives VOCs and soot somewhere to go instead of settling in a closed nursery.
Keep burn time short. An hour or two is enough to scent a room without letting combustion byproducts build up.
Let fresh air do some of the work. Airing out a room for ten minutes often accomplishes what a plug-in is trying to do, minus the synthetic fragrance load.
Read "fragrance" the same way you read it on a skincare label. If a home product doesn't disclose what's behind that word, it's worth treating the same way you'd treat an undisclosed fragrance in a baby wash or lotion.
Frequently Asked Questions
Are scented candles safe to burn in a baby's room?
They can be, in moderation and with the right kind of candle. Choosing a soy or beeswax candle scented with essential oils, burning it for a limited time, and ventilating the room afterward reduces the airborne compounds your baby is exposed to compared to a paraffin candle with synthetic fragrance burned for hours.
Are plug-in air fresheners bad for babies?
Plug-in air fresheners that run continuously can steadily release synthetic fragrance and VOCs into a small space like a nursery. Because they're designed to keep scenting the air around the clock, they may expose a baby to more cumulative airborne fragrance than an occasional candle.
What's a safer alternative to synthetic air fresheners?
Ventilation, beeswax or soy candles with essential-oil scent, and infant-safe essential oil diffusers used intermittently are generally gentler choices than paraffin candles or synthetic spray and plug-in fresheners.
Which essential oils are not recommended around babies?
Oils like eucalyptus, peppermint, and wintergreen are commonly flagged as not appropriate for infants and young toddlers. If you're diffusing around a baby, look specifically for oils labeled safe for infants and keep the room ventilated.
Why doesn't the label tell me what's actually in the fragrance?
Fragrance formulas are typically protected as trade secrets, so companies aren't required to list every compound in a scent blend. This applies to candles, air fresheners, and personal care products alike — it's why reading for "fragrance" as a red flag, rather than assuming it's automatically fine, is a habit worth carrying through your whole home.
You don't need to overhaul your whole house to make a meaningful difference here — a few small, intentional swaps in how you scent your baby's space go a long way. It's the same philosophy we built Kindred Naturals on: you shouldn't have to choose between a home (or a baby wash) that feels good and one that's honest about what's actually in it. If you're looking to bring that same thinking to your baby's skincare routine, you can explore our fragrance-free Baby Shampoo & Body Wash at shopkindrednaturals.com.
Written by Mike & Carly Pronsky, founders of Kindred Naturals.