Scented laundry products: how fragrance ends up on your skin

Pull a shirt out of the dryer and it smells of “clean” for days. That scent isn’t an accident, and it isn’t sitting on the surface waiting to be rinsed away. It’s been engineered to bond to fabric and release slowly, which means your clothes, sheets and towels quietly deliver fragrance to your skin all day and all night. Here’s how that works, and what the research actually says about whether it matters.

Laundry fragrance is designed to stay put

Most fragrances in skin care are meant to be noticed for a few hours. Laundry fragrance has a harder job: it has to survive a hot wash, a rinse and a dryer, then keep working for days on a folded towel.

A feature article in the American Chemical Society’s magazine, Chemical & Engineering News, describes how dryer sheets do this. The sheet is coated with a softening agent, and during tumble drying the coating melts and transfers onto the fabrics being dried. Fragrance molecules are added to that coating. Chemists choose fragrance molecules that can best survive the high temperatures inside the dryer, and one company patented a way of spraying the fragrance onto the sheet after the softener has cooled to minimize loss. Another encapsulates fragrance molecules in cyclodextrins, ring-shaped sugar molecules that hold the scent and release it as water evaporates from the clothes.

In other words, the goal of a laundry fragrance is to stay in your fabric, not to wash out. That’s the whole point of the product.

How much fragrance is in laundry products?

Nearly all of them contain it. A 2020 study in the journal Dermatitis examined the 65 best-selling laundry products in the United States: 30 detergents, 10 fabric softeners, 8 dryer sheets and 17 stain removers. Fragrances and essential oils were the most common potential allergen in every category, appearing in 66.7% of detergents, 90% of fabric softeners, 75% of dryer sheets and 58.8% of stain removers.

The same study found something worth remembering: detergents marketed for babies or as free of dyes and fragrance still contained common allergens, most often the preservative methylisothiazolinone. Marketing words on the front of a laundry jug are no more reliable than they are on a bottle of lotion.

From fabric to skin, over a whole day

Think about what touches your skin: a shirt for 10 hours, pyjamas and sheets for 8 more, a towel after every shower, a pillowcase against your cheek all night. If fragrance is in the fabric, it’s in contact with you far longer than any lotion.

A 2023 review in the journal Cutis pulled together what’s known about residues. One study it cites found that after washing cotton cloths in a detergent solution, residue remained at 139 to 2,820 parts per million and took 20 to 22 rinses in plain water to become undetectable. Another modelled a common detergent surfactant (a cleaning agent that lifts dirt from fabric) and estimated that although the amount left after machine washing is too low to irritate, the concentration on the fabric surface rises again as clothes dry, and a hot dryer may enhance that effect.

Fabric softener and dryer sheets are a different case again, because they’re added after the rinse. Whatever they deposit, fragrance included, is meant to stay.

So does it cause reactions? Here the evidence is humbling

This is where the straight answer diverges from the intuitive one. Laundry products are a common source of fragrance exposure, but confirmed allergic reactions to them are uncommon.

The Cutis review reports that 10.7% of 738 patients undergoing patch testing believed laundry detergent was contributing to their skin problem. When the North American Contact Dermatitis Group tested those patients with diluted detergents, only five, or 0.7%, had a possible allergic reaction, and re-testing suggested some of those were irritant rather than allergic. The authors concluded that detergent allergy was “at most 0.7%, and possibly lower.”

A 2006 paper in Contact Dermatitis, which should be read as a manufacturer-funded study since its lead authors worked for a laundry-product maker, used a quantitative risk assessment and concluded that the risk of becoming sensitized to fragrance through washed fabric appears extremely low. It also noted that a rash following the pattern of clothing is almost never seen in people with fragrance allergy. The Cutis review adds a small elicitation study: when 36 people already allergic to a fragrance were exposed to increasing amounts of it, only two reacted, weakly, and only at a level estimated to be 20 times higher than normal exposure from laundered clothing.

The Cutis authors sum it up carefully. Machine washing likely reduces fragrance and preservatives to below clinically relevant levels, but uncertainty remains about the impact of these low concentrations on people with strong contact allergy, and large studies with modern detergents haven’t been done. In plain terms: for most people, scented laundry is not making them itch; for a person with a confirmed fragrance allergy or eczema, it remains a reasonable thing to remove, because the exposure is constant and the fix is easy.

What the dermatology groups suggest

Because laundry is cheap to change, the advice for reactive skin is consistent:

• The Canadian Dermatology Association suggests using mild fragrance-free detergents to wash clothing, with no bleach or fabric softener, and double-rinsing.
• The Eczema Society of Canada recommends looking for fragrance-free and dye-free laundry products formulated for sensitive skin, and notes that rinsing laundry twice may help. It also suggests soft 100% cotton clothing and bedding, washed regularly.
• Dryer sheets don’t appear in either recommendation for a reason: they add fragrance and coating after the rinse, so the simplest step is to skip them.

Our laundry category lists detergents and related products reviewed for these criteria.

A practical routine for sensitive households

You don’t have to overhaul everything at once:

• Switch the detergent first. It touches every load.
• Drop fabric softener and dryer sheets, or replace them with unscented alternatives. If you miss soft towels, a shorter dryer cycle helps more than you’d expect.
• Use the extra-rinse setting, especially for sheets, towels, underwear and children’s clothes.
• Wash new clothes and bedding before first use.
• Keep one “scented” load separate if someone in the house loves the smell, and wash the reactive person’s things on their own.

If a rash doesn’t improve after two weeks on fragrance-free laundry and skin care, the laundry probably wasn’t the cause. See your doctor or pharmacist, and if the rash follows your clothing lines, ask about patch testing for textile dyes, which are a far more common cause of clothing-pattern rashes than detergent.

What to remember: laundry fragrance is built to stay in fabric that sits against your skin around the clock, and nearly every scented laundry product contains it. The evidence that it causes allergic reactions in the general population is weak, but for eczema, sensitive skin or a diagnosed fragrance allergy, fragrance-free detergent, no softener and an extra rinse are a low-cost way to remove an all-day exposure.