8 household items that increase cancer risk (and what to use instead)

TL;DR: You probably think your home is a safe haven, but you may be unknowingly surrounding yourself with dangerous substances linked to cancer, hormone disruption, and respiratory issues. These are eight household items that increase cancer risk, what the research says about each, and the simple swaps that lower your exposure without ripping your life apart.

Have you ever wondered if some of the ordinary objects in your home could secretly be harmful to your health? Things you use every day without a second thought may actually contain hidden toxins and germs. Here are eight sneaky household items that increase cancer risk and can negatively impact your health if you are not careful.

You probably think your home is a safe haven, but you may be unknowingly surrounding yourself with dangerous substances linked to cancer, hormone disruption, respiratory issues, and more. These are the unexpected risks lurking right under your nose. You will never look at your everyday products the same way again.

1. Are scented candles actually bad for you?

Yes. Most scented candles contain limonene and phthalates. Limonene gives off that citrusy scent, and when released into the air, it can convert into formaldehyde, a known human carcinogen. Phthalates, which make fragrance last longer, are endocrine disruptors linked to hormonal imbalances and increased liver cancer risk.

Let’s start with something that seems completely harmless. Who doesn’t love the cozy glow and delicious aromas wafting from these popular decor items? But those enticing scents are hiding some seriously concerning chemicals.

According to the International Agency for Research on Cancer, formaldehyde exposure can cause unpredictable inflammatory reactions, liver toxicity, lung and breast cancer, and adverse effects on pregnant women and fetuses. The phthalates are also linked to impaired brain development, ADD/ADHD, and worsened behavioral disorders in children.

And it is not just candles. According to the International Agency for Research on Cancer, 91% of everyday household products emit formaldehyde. Experts especially warn against burning candles indoors or in your bedroom, as it can raise levels of carbon monoxide, leading to dizziness, headaches, and nausea.

Use scented products sparingly, and frequently ventilate your home by opening windows instead of relying on candles to eliminate odors. And absolutely do not keep candles in your bedroom.

2. Humidifiers can grow dangerous bacteria

Many people run humidifiers to moisturize dry winter air. They seem harmless enough, but think again. Research investigating bacteria levels in humidifier water tanks over time found that after 12 hours, purified water and tap water contained similar amounts of microbes. Scientists expected the chlorine in tap water to kill germs and prevent bacteria growth, but that was not the case.

Experts explain that no matter the water source, humidifiers inherently encourage bacterial growth by housing water for extended periods. Without proper maintenance, dangerous bacteria like Pseudomonas aeruginosa, Legionella, and Streptococcus pneumoniae can thrive in the tanks. These bugs can cause pneumonia, respiratory illnesses, sepsis, and more.

Be diligent about thoroughly cleaning your humidifier’s water reservoir at least every 3 to 4 days to prevent massive bacteria buildup. Leave the device open and dry when not in use.

3. What’s hiding in dry cleaned clothes?

Harsh solvents. Dry cleaners rely on perchloroethylene, or PERC, to remove tough stains, and PERC is a known carcinogen. According to the Occupational Safety and Health Administration, continuous exposure can increase disease risk by entering the body through skin or inhalation.

Research suggests prolonged PERC exposure raises chances of certain cancers like esophageal, uterine, and bladder cancer. Breathing in the vapors can cause dizziness, nose and throat irritation, memory loss, and rash.

To save time, cleaners often cover clothes in plastic before they are fully dry. Toxic fumes get trapped in the plastic, and you breathe them in every time you open your closet. The solvent benzene is also used, which is a volatile organic compound linked to cancer.

Before hanging dry cleaned clothes in your closet, remove the plastic and let them air out for 3 to 4 hours. Give them a good shake too. Keep them far from heat and sunlight, which makes vapors more potent.

4. Why thermal receipts are more toxic than they look

Thermal paper is coated with chemicals that react to heat to print characters without ink. Often, the chemical used is BPA, bisphenol-A, a well-known endocrine disruptor that can be absorbed through the skin.

Extensive research on BPA has found that continued exposure severely decreases male sex hormones like testosterone, leading to erectile dysfunction and reduced libido in men. In women, it also causes problems like early puberty and birth defects. BPA exposure is additionally linked to uterine and breast cancer, diabetes, obesity, and eczema.

It is critical to handle receipts cautiously. BPA absorbs into the skin much easier with oil than water. So if you have just put on hand lotion and then grab a receipt, you will absorb insane amounts of BPA. Studies show handling a receipt for just 2 seconds with creamed hands causes BPA absorption at levels nearly 80 times the safety limit.

Avoid stashing receipts in your wallet or purse. If you must handle receipts frequently for work, wear gloves to protect yourself.

5. Do antibacterial soaps actually keep you safer?

Ironically, no. Research reveals these products can actually pose harm. The active ingredient triclosan is linked to altered thyroid hormones, antibiotic resistance, and weakened immune function. Lab studies also found it is an endocrine disruptor.

Triclosan reacts with chlorine in tap water to form chloroform gas. Exposure to this nasty disinfection byproduct can lead to depression, liver problems, and cancer. In 2016, the FDA banned triclosan along with 18 other chemicals from soaps because manufacturers failed to demonstrate their safety and effectiveness.

Check your soap’s ingredients list and stop using any that list triclosan. Stick to regular soap and water, which work just fine to eliminate germs as long as you wash properly. If you still want an antibacterial boost, look for soaps containing benzoic acid instead, as this has a safer track record.

6. Nonstick pans release PFOA when they break down

The convenience of these pans comes at a cost. The nonstick surface eventually breaks down and releases toxic fumes. The material is called PFOA, a likely carcinogen according to the International Agency for Research on Cancer.

When overheated, nonstick coatings release particles you can accidentally ingest with your food. PFOA enters the body and stays for years because it is chemically stable. It has been detected in the blood of nearly every American tested.

Studies connect high PFOA levels to increased cholesterol, risk of thyroid disorders, and delayed puberty. In lab animals, it also caused birth defects and cancer.

To play it safe, ditch old nonstick pans with chipping or peeling. Use ceramic or stainless steel cookware instead. And go easy on nonstick surfaces. Do not use high heat, metal utensils that can scratch, or harsh scouring pads for cleaning.

7. Why air fresheners quietly raise indoor phthalate levels

Air fresheners seem like a harmless way to keep your home smelling fresh. But unfortunately, most contain phthalates, those same endocrine disruptors found in scented candles. Phthalate particles bind to dust, so they linger in the air.

Frequent use of air fresheners raises indoor phthalate levels substantially, a worrisome finding. Studies also detect more phthalates in the urine of people who use air fresheners and scented cleaning products multiple times per week. Higher phthalate exposure is linked to fertility issues, neurological and learning problems in children, asthma, diabetes, and breast cancer.

Skip the air fresheners. Open windows and ventilate rooms to naturally freshen air instead. Houseplants like orchids, aloe vera, and English ivy also help purify indoor air without chemicals. Regularly vacuum, dust, and use green cleaning products like vinegar and baking soda to eliminate odors at the source.

8. Are plastic food containers safe if they say BPA-free?

Not entirely. Even BPA-free plastic can leach estrogen-like chemicals. A study by the Endocrine Society found these chemicals trigger genes involved in breast cancer tumor growth when exposed to common food preservatives like propyl paraben.

Toxic additives in plastic like phthalates and bisphenols do not remain confined either. They migrate into the foods and beverages they contact. Reheating foods in plastic containers accelerates chemical leaching. Over time, ingesting these chemicals from plastic leads to measurable levels in the human body that can disrupt normal hormone function.

To play it safe, limit use of plastic food containers whenever possible. Opt for glass or stainless steel instead. Never put plastic containers in the microwave, and avoid contact with fatty or acidic foods.

With just a little awareness and prudent practices, you can dramatically lower your risks.

How to lower your risk starting this week

While our homes contain many unexpected sources of harmful toxins and bacteria, the good news is that with just a little awareness and prudent practices, you can dramatically lower your risks. Take inventory of your everyday products and swap out concerning items.

• Use scented candles sparingly, never in the bedroom, and ventilate by opening windows instead.
• Clean your humidifier’s water reservoir every 3 to 4 days and leave it open and dry when not in use.
• Remove dry cleaning plastic and air clothes out for 3 to 4 hours before putting them in the closet.
• Keep receipts out of your wallet or purse, and never handle them with lotioned hands.
• Skip triclosan soaps. Regular soap and water work fine.
• Replace chipped or peeling nonstick pans with ceramic or stainless steel.
• Swap air fresheners for open windows, houseplants, vinegar, and baking soda.
• Store and reheat food in glass or stainless steel, not plastic.

A gentle closing thought

Guard your wellbeing by creating a safer, healthier home environment. Handle plastics and receipts more carefully. Ventilate rooms regularly. Adopt greener cleaning and self-care routines. I hope this empowers you to make positive changes and live consciously.

If this was eye-opening, the newsletter lands in your inbox every Friday. One tiny essay, a handful of good links, and quiet nudges like this one. As always, take care of yourself.

Frequently asked questions

Why are scented candles linked to cancer?

Most scented candles contain limonene and phthalates. When released into the air, limonene can convert into formaldehyde, a known human carcinogen. Phthalates are endocrine disruptors linked to hormonal imbalances and increased liver cancer risk, plus impaired brain development and behavioral disorders in children.

How often should you clean a humidifier to prevent bacteria?

At least every 3 to 4 days. Humidifiers inherently encourage bacterial growth by housing water for extended periods. Without proper maintenance, bacteria like Pseudomonas aeruginosa, Legionella, and Streptococcus pneumoniae can thrive in the tanks and cause pneumonia, respiratory illnesses, and sepsis. Leave the device open and dry when not in use.

Can BPA really absorb through your skin from receipts?

Yes, and oil makes it worse. BPA absorbs into the skin much easier with oil than water. Studies show handling a receipt for just 2 seconds with creamed hands causes BPA absorption at levels nearly 80 times the safety limit. Avoid stashing receipts in your wallet or purse, and wear gloves if you handle them frequently for work.

Are BPA-free plastic containers actually safe?

Not entirely. Even BPA-free plastic can leach estrogen-like chemicals. A study by the Endocrine Society found these chemicals trigger genes involved in breast cancer tumor growth when exposed to common food preservatives like propyl paraben. Use glass or stainless steel when you can, never microwave plastic, and avoid contact with fatty or acidic foods.

What should you use instead of antibacterial soap?

Regular soap and water, which work just fine to eliminate germs as long as you wash properly. The FDA banned triclosan and 18 other chemicals from soaps in 2016 because manufacturers failed to demonstrate their safety and effectiveness. If you want an antibacterial boost, look for soaps containing benzoic acid instead, as this has a safer track record.

What cookware is safer than nonstick?

Ceramic or stainless steel. Nonstick coatings use PFOA, a likely carcinogen according to the International Agency for Research on Cancer, and the material stays in the body for years because it is chemically stable. Ditch old nonstick pans with chipping or peeling, avoid high heat and metal utensils on the ones you keep, and do not scrub with harsh scouring pads.