303 Chemicals in Baby Clothes: What Parents Need to Know
the study, the chemicals, what to do and an organic clothing guide
* if you are interested in the organic clothing guide with over 170 companies making baby, kids, women and men’s GOTS certified clothing (and bedding and outdoor clothes!) I have an amazing guide I personally use for my own family that I recently updated. YOU CAN FIND IT HERE
“Even subtle biochemical disruptions can contribute to long-term adverse health effects.” — Environmental Research, 2024
When we dress our babies, we think about softness, comfort, and safety — not chemicals. But a new study has uncovered something unsettling: infant clothing doesn’t just contain a couple of chemicals, in fact some items contain hundreds of different substances, including some linked to hormonal imbalance, infertility, and cancer.
The Study That Changed How We See Baby Clothes
In October 2024, scientists published research in Environmental Research analyzing 43 infant garments from homes and stores in Spain. In the past scientist have tested for a handful of specific chemicals (this is how we found out many socks made with a spandex/polyester blend contain BPA for example), this time they weren’t just testing for a few known toxins — they screened for all detectable chemicals.
The results? 303 separate chemicals turned up in those tiny fabrics. Among them:
pesticides,
plastics,
cleaning agents,
fragrance ingredients,
prescription drugs (The antidepressant venlafaxine appeared in more than half of the samples, alongside traces of opioids, hormones, and thyroid regulators).
These chemicals are NOT intentionally added; contamination likely came from polluted manufacturing water, recycled fibers, or industrial runoff. The discovery suggests something bigger: that the clothes we assume are harmless might quietly expose babies (and likely ourselves) to chemicals every day.
Why It Matters for Infants
Babies’ skin is thinner and more absorbent than adult skin. They spend nearly every hour wrapped in fabric — sleeping, nursing, drooling, crawling — often with their mouths pressed right against the material. Even trace exposures can matter during early development because they are so vulnerable and still developing. Hormones guide everything from growth to brain development, and disrupting that delicate balance can set off long-term effects. Researchers warn that low-level chemical interference is linked to fertility problems, thyroid issues, endometriosis, and some cancers later in life. Let me be clear: it is a fact that what touches your baby’s skin can enter their body.
What the Researchers Found
The chemical mix inside those garments reads like a lab inventory rather than a laundry label. Here’s a closer look at what they uncovered:
Pharmaceuticals Antidepressants, opioids, hormones, and thyroid drugs appeared across multiple garments —.
Pesticides and Biocides Compounds like DEET and metamitron, associated with hormonal and respiratory effects, leached from fabrics in plain water.
Plasticizers & Bisphenols (BPA/BPS) Common in flexible materials, these are endocrine disruptors that mimic or block natural hormones.
Fragrances & Synthetic Musks Ingredients such as tonalide and galaxolidone — persistent in the environment and human tissue — can interfere with hormones and accumulate over time.
Preservatives & UV Filters Substances like methylparaben and benzophenone, restricted in food and cosmetics, were widespread in the fabrics tested.
Flame Retardants & Dyes Some dye by-products (like 2-naphthylamine) are carcinogenic. Flame retardants are linked to thyroid and developmental effects.
The concern is that it’s not one “bad” chemical but a cocktail of them — from dyes and coatings to water-resistance finishes — layered into the textile supply chain.
Are any regulations in place to avoid this?
In the United States, infant textiles are regulated mostly for flammability and lead, not for chemical residues. The European Union does more, but its still not perfect; some compounds banned from cosmetics or detergents can still appear in clothing.
Because fabrics often cross borders — yarn spun in one country, dyed in another, sewn in a third — tracking every chemical used becomes nearly impossible. A baby onesie sold in California could carry dye additives from Asia or softeners from Eastern Europe.
What is the solution?
I think it is time to treat clothing with the same seriousness as food or skincare. If we care about what goes in our babies’ bodies, we should care what goes on them too. As consumers we should ask more questions of clothing manufacturers…. pushing them for more transparency and testing. I would love to see a clothing label that tells us every single chemical used in the manufacturing of that piece and every single chemical with detectible levels tested for…. and obviously hoping that is a short list!
How Exposure Happens
Skin absorption via clothing is in small amounts… but it can be a concern. Just think about medical creams or patches that deliver drugs/ medicines via the skin. Chemicals that leach from fabrics can make their way to the bloodstream directly Because a baby’s detox systems is still developing, even small daily exposures can build up. Studies link chronic low-level exposure to endocrine-disrupting chemicals (EDCs) with:
Early puberty
Infertility and reproductive disorders
Hormonal and thyroid imbalance
Developmental and behavioral effects
Increased cancer risk later in life
What Parents Can Do Right Now
You don’t need to overhaul your entire nursery wardrobe — awareness and a few smart habits can lower exposure dramatically.
Wash Everything New (Twice if Possible) for the whole family! Even simple laundering removes some residues. I like Meliora and Molly Suds for my family’s laundry
Avoid synthetic materials (nylon, polyester, acrylic for example) as much as possible, especially for young children
Choose Organic or Certified Fabrics Look for GOTS-certified or Oeko-Tex Standard 100 labels. These certifications test and limit toxic dyes and finishes. If budget or availability of certified products are a concern focus on clothing used closest to the skin and most often: ie underwear, base layers, pjs)
Avoid “Performance” Fabrics Skip anything labeled stain-resistant, wrinkle-free, antimicrobial, waterproof, or flame-resistant. Those claims often rely on PFAS, flame retardants, or other chemical coatings.
Steer Clear of Strong Scents A “fresh” smell usually means added fragrance chemicals. Opt for fragrance-free or naturally untreated items.
Buy Fewer, Better Pieces Quality natural fabrics from transparent brands often mean fewer chemical processes — and longer-lasting clothes.
Support Non-Toxic Brands More small companies now test for PFAS and disclose their results. Look for tags that say PFAS-free, non-toxic dyes, or tested for harmful substances.Trust me: if a company is testing and doesn’t have these chemicals they almost always are proud and loud about it and have that info visibly available! If its not, you can ask, but likely it is a concern
If you would like a list of companies manufacturing GOTS certified clothing for the entire family ( over 170 including: kids/ babies, women underwear, jeans, women’s clothing, men’s clothing) I have an amazing guide on the topic (including information on what this is important and various bonus sections like Bedding) - 56 pages - its my best seller and a guide I personally refer to every time I need to buy clothing for the family!