The Receipt Rethink: What You Need to Know

Most of us barely think about receipts. We take them, crumple them into bags, stuff them into coat pockets or occasionally find one fused to an old boiled sweet. But many are not as simple as they seem. Thermal paper is coated with heat-reactive chemicals, and that coating can include bisphenols such as BPA and BPS – substances now being closely examined for their potential impact on hormone health. So, what does that actually mean?

What are endocrine disruptors?

Your endocrine system is your body’s internal messaging system. Hormones control everything from fertility and metabolism to mood, thyroid function, growth, reproduction and sleep. They act as chemical messengers, travelling through the body telling organs what to do and when.

Endocrine-disrupting chemicals (EDCs) are substances that can interfere with that system. They may:

Mimic natural hormones like oestrogen

Block hormone receptors

Alter hormone production

Affect how hormones are broken down

The important thing to understand is that hormones work in very small amounts. Tiny shifts can have wider effects than people often realise. That’s why scientists and regulators pay close attention to endocrine disruptors.

What is BPA and why is it controversial?

BPA (Bisphenol A) is an industrial chemical that has been used for decades in plastics, resins and thermal paper. It has been widely studied because of concerns about its hormone-disrupting effects. Research has linked BPA exposure to changes in reproductive health, fertility, thyroid function and metabolism. That does not mean BPA directly causes disease in every case, but it is enough for regulators to act cautiously. In fact, the European Union restricted BPA in thermal paper in 2020, and the UK continues equivalent restrictions under UK REACH.

Are receipts still a problem?

Potentially, yes. It's important to note that receipt exposure alone has not been proven to directly cause specific diseases. The problem is that many manufacturers replaced BPA with similar compounds, particularly BPS (Bisphenol S). On paper, “BPA-free” sounds reassuring. In reality, it does not necessarily mean “bisphenol-free.” And some replacement bisphenols may have similar endocrine-disrupting properties.

Thermal paper is designed so that the coating sits on the surface, which means small amounts of those chemicals can transfer onto the skin when you handle a receipt. Some of that can then be absorbed, particularly with repeated contact.

Where it becomes more relevant is in the context of how often that contact happens. Picking up a receipt now and then, tucking it into your bag, forgetting about it – that’s unlikely to make any meaningful difference. But if your job involves handling receipts all day, every day, over months and years, it is something worth considering.

Why retail workers may be most affected

For most of us, handling receipts is occasional; but for cashiers, pharmacy staff, hospitality teams and retail workers, it’s constant. Hundreds of receipts, shift after shift, week after week. And with that comes repeated contact.

A number of occupational studies have looked at this more closely. A 2016 biomonitoring study of cashiers found that those handling thermal paper receipts had significantly higher urinary BPA levels than non-exposed workers. In another study published in the Journal of the American Medical Association, volunteers who handled receipts continuously for just two hours showed a marked increase in urinary BPA levels – an effect that disappeared when gloves were used. More recent research has also shown that BPS (a common BPA substitute) can be detected at higher levels in cashiers, reinforcing the concern that replacement chemicals may behave in similar ways.

Taken together, these studies don’t prove harm in any direct, clinical sense. But they do show something important: handling receipts isn’t just a theoretical exposure. It’s measurable. And in public health, when something is both real and repeated, it tends to deserve a closer look.

Does this affect women and men differently?

Hormones underpin health in both men and women, but the way disruption shows up can differ. In women, where hormonal systems are more cyclical and fluctuate across life stages, research has explored links with menstrual cycles, fertility, pregnancy, and the shifting landscape of perimenopause and menopause. There’s also interest in how endocrine-disrupting chemicals interact with oestrogen-sensitive tissues, such as breast tissue.

In men, the focus has tended to be on testosterone signalling, sperm quality and fertility, as well as hormone-responsive tissues like the prostate.

Children and unborn babies are considered particularly sensitive, simply because hormones play such a central role in growth and development. Timing matters as much as dose.

Should you stop taking receipts?

Not necessarily. But understanding where exposure comes from and making small, sensible choices where you can makes sense. That might mean opting for digital receipts where they’re offered, washing your hands after handling multiple slips, or simply not keeping them loose in your bag or pockets longer than needed. It’s also worth avoiding handling them immediately after using hand sanitiser, when skin absorption may be higher.

For retail workers, the conversation is more relevant, simply because the level of contact is greater. When something is handled hundreds of times a day, it’s the small, practical habits that matter – washing hands before eating, avoiding unnecessary contact, encouraging customers to accept digital receipts where possible, and, in higher-volume roles, considering protective measures such as nitrile gloves.