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Baby · Ingredient check
Paste any product's ingredient list — a baby lotion, wash, balm or diaper cream. We flag what pediatric and dermatology guidance says to keep off infant skin or use with caution, and the gentle emollients it recommends — and we cite every call. This is an educational screen, not medical advice; a baby's skin is not a small adult's.
Keep camphor off babies. It's well absorbed through skin as well as by inhalation and ingestion, and is neurotoxic — fatal doses in children have been as little as 0.7–1 g, camphor/menthol/eucalyptus balms have caused seizures and respiratory distress in infants, and a documented case of skin exposure alone triggered convulsions in a small child. There is no infant skincare need for it.
Camphor, menthol/eucalyptus (1,8-cineole) and peppermint are the terpenes behind most 'cooling' chest and vapor rubs, and pediatric case reports describe real harm in young children: balms containing them have caused seizures and respiratory distress, and even oral exposure to a small amount of eucalyptus oil in a toddler can cause drowsiness — with more serious reported outcomes (seizures, coma) at higher doses. Pediatric guidance is to keep these off babies, especially chest and face rubs, where a baby is also more likely to inhale or ingest the product.
Oil of wintergreen is almost pure methyl salicylate — extraordinarily concentrated salicylate. In children under 6, a teaspoon (5 mL) or less of oil of wintergreen has been implicated in several documented deaths, and methyl salicylate is also absorbed through skin: a case report in an adult on dialysis showed continued topical absorption kept driving salicylate levels up even during treatment. It has no place in a baby's routine.
A baby's high skin-surface-to-weight ratio means topical salicylic acid is absorbed far more than in an adult, and genuine salicylate poisoning (salicylism) from topical use has been documented in infants — including a 6-week-old who reached a plasma salicylate level of 580 mg/L after a concentrated salicylic acid preparation was left under occlusion on the scalp for three days. Dermatology guidance says salicylic acid 6% should not be used under age 2, over large areas, for long periods, or under occlusion. Skip it on infants.
The FDA warns that benzocaine can cause methemoglobinemia — a life-threatening drop in the blood's oxygen-carrying capacity — and should not be used in children under 2; more than 400 cases have been reported since 1971, some fatal. The same caution applies to related numbing agents like lidocaine and prilocaine. Numbing gels, creams and solutions are not something to put on a baby without a doctor directing it.
The Cosmetic Ingredient Review concludes borates are safe for adults at ≤5% but explicitly says they 'should not be used on infant or injured skin' — infant and broken skin absorb boron more readily than intact adult skin. A firm avoid for babies, on the CIR's own guidance.
The EU SCCS found no concentration of methylisothiazolinone safe for leave-on products from a sensitisation standpoint, and pediatric dermatology guidance has specifically flagged reports of allergic contact dermatitis in children linked to MI in wet wipes. It was named the American Contact Dermatitis Society's Allergen of the Year in 2013 amid a documented rise in MI allergy. These preservatives are potent contact allergens — best avoided on infant skin, especially in leave-on products and wipes.
Topical retinoids are irritating even on adult skin and their safety and efficacy have not been established in young children — tretinoin's labelling stops at age 12. A baby's barrier can't tolerate them and there is no reason to use one; leave anti-ageing and acne actives out of infant care.
A skin-lightening drug with no place in baby skincare. Hydroquinone penetrates skin readily — human studies found it well-absorbed through intact adult skin after a single application — and an infant's more permeable, higher-surface-area skin would be expected to absorb at least as much, though this hasn't been separately studied in infants. Pediatric safety and efficacy have not been established, and infants have no need for a depigmenting agent. Avoid.
Solvent alcohols are drying and disrupt the barrier, and an infant's immature skin absorbs them more readily than an adult's. The clearest evidence comes from medical, not cosmetic, exposures: full-strength alcohol used to prep a premature infant's skin before catheterization caused necrosis from systemic absorption, and days of ethanol-soaked gauze on a one-month-old's umbilical area caused alcohol intoxication. Those are higher-concentration, prolonged, or occlusive exposures compared with a quick wipe of a dilute cosmetic alcohol — but they show how much more an infant's skin can absorb, which is why drying alcohols like Alcohol Denat. are best avoided in routine baby products. Fatty alcohols like cetyl or cetearyl alcohol are different (gentle emollients) and are not flagged here.
Never on a baby. Mercury is an illegal-but-still-circulating skin-lightening/antiseptic ingredient; an infant's thin skin absorbs it readily and it damages the developing kidneys and nervous system. Stop using any product that lists 'mercury', 'mercurous chloride', 'calomel', 'mercuric', or 'mercurio'.
Traditional kohl/kajal/surma on a baby's eyelids is a documented cause of childhood lead poisoning — some products are more than half lead by weight, and lead is a cumulative neurotoxin with no safe level for a child. Use only cosmetics verified lead-free.
A once-common antiseptic that is neurotoxic to infants — routine bathing of newborns caused vacuolar brain damage and deaths, which is why the FDA restricted it to prescription use in 1972. It has no place in baby care.
Skip peanut oil on a baby's broken or eczematous skin. A case-control study nested in a UK birth cohort found infants whose inflamed skin was treated with peanut-oil creams had higher odds of developing peanut allergy (odds ratio 6.8, but a wide 95% CI of 1.4–32.9 from a single study). Sensitisation appears to happen through damaged skin. Refined peanut oil on intact skin is lower-risk, and the field has since shifted toward encouraging early oral peanut introduction (post-LEAP trial) rather than topical avoidance — but for eczema-prone babies, skipping peanut oil on broken skin remains an easy, low-cost precaution.
The AAP recommends fragrance-free, hypoallergenic products for babies. Fragrance is a leading cause of contact allergy, and the individually-named ingredients above (limonene, linalool, geraniol…) are the very allergens the EU makes brands declare — a product can even say 'fragrance-free' yet list these. (European pediatric dermatology guidance takes a slightly softer line, allowing fragrance if it's selected from a regulator-approved, lower-allergenicity list — but for babies, going genuinely fragrance-free is the simpler, safer default.)
Essential oils are concentrated and under-studied on infants. Tea tree oil has caused documented contact sensitization in children, and lavender and ylang-ylang oils are recognized sensitizers in general dermatology literature (allergenic components like linalool, linalyl acetate and benzyl benzoate are common enough to sit in standard patch-test panels). Some citrus oils are also phototoxic, and infant skin absorbs more of what's applied. This is a caution, not a ban — heavily diluted use of a gentle oil is often tolerated — but for babies, fragrance-free is the safer default and a clinician conversation is sensible.
These preservatives work by slowly releasing formaldehyde, a common contact allergen. Testing of baby wipes has found roughly a quarter of products release detectable formaldehyde — often without it being a declared ingredient — so a wipe or wash can expose a baby to it even when the label doesn't say 'formaldehyde.' Not acutely dangerous the way camphor is, but a sensible thing to avoid on a baby prone to eczema or with already-sensitised skin — prefer a product preserved without them.
Exfoliating acids thin the stratum corneum and are separately documented to increase sun sensitivity in general cosmetic use — the opposite of what a baby's already more-permeable barrier needs, and infants have no need to exfoliate. Trace lactic acid as a pH buffer in a wash is different; leave-on AHA actives aren't for babies. This is a precautionary call, honestly disclosed: there is no dedicated infant AHA safety study behind it.
The AAP advises avoiding oxybenzone because of concern about mild hormonal properties, and recommends mineral filters (zinc oxide / titanium dioxide) for children. For infants under 6 months, shade and clothing come first — sunscreen only on small areas if unavoidable. Don't stop protecting a baby from the sun; just prefer a mineral formula.
Propylene glycol is a common, usually well-tolerated humectant, but a neonate's capacity to clear it is reduced — pharmacokinetic studies in preterm/term neonates find the alcohol-dehydrogenase pathway (and renal elimination) immature in the first month of life, so it can accumulate — and transdermal absorption through broken or burned skin caused coma in a premature infant treated with propylene-glycol-based dressings. It is also a weak contact allergen. Low-level use on intact skin is generally fine; the caution is for newborns, high concentrations, and broken skin.
Lanolin is a genuinely useful emollient (it's the basis of many nipple and diaper creams) and outright allergy is uncommon (patch-test positivity ~1.7–3.3% in dermatitis patients, well under 0.5% in the general population), but it was the 2023 Allergen of the Year and sensitisation rises with the repeated, occluded exposure typical of baby creams. Fine for most babies; worth knowing as a possible cause if a rash appears, and worth avoiding on already-broken skin.
A skin antiseptic that can cause chemical burns on the fragile skin of premature and very young infants. Following case reports of burns, the FDA required a 'use with care in premature infants or infants under 2 months of age' label change, and the EU's EMA safety committee separately recommended the same caution for newborns — especially those born before 32 weeks or in their first 2 weeks of life. Useful under a clinician, but not for routine at-home use on a newborn.
Iodine absorbed through a premature baby's thin skin can overwhelm the immature thyroid. Controlled NICU studies found significantly higher TSH in iodine-exposed preterm infants than those cleaned with chlorhexidine (about 15.4 vs 7.8 mIU/L in one study), and a systematic review put transient hypothyroidism at 12–33% of iodine-exposed infants versus 0% in unexposed ones — the risk concentrated in babies born under 32 weeks. It typically resolves on its own, but guidance is to avoid routine povidone-iodine antiseptic on premature or newborn skin in favour of gentler options. A one-off clinician application, or use on an older, full-term baby, is a lower-risk matter.
Loose talcum powder can be inhaled by a baby and cause serious lung irritation — AAP's own infant-safety guidance says outright not to use baby or talcum powder because inhaled talc can cause severe lung damage and breathing problems, a risk borne out in reported infant aspiration cases. Separately, talc mined near asbestos deposits can carry asbestos contamination — the FDA has found trace asbestos in some tested talc cosmetic products and continues to test for it. Prefer talc-free options; if used at all, keep powder well away from a baby's face.
The sunscreen filters the AAP prefers for children — they sit on the surface and reflect UV with minimal absorption, and zinc oxide is also the classic diaper-rash barrier (per AAP's diaper-rash guidance). For babies over 6 months — and small exposed areas under 6 months when shade isn't possible, per AAP's sun-safety guidance — a mineral sunscreen is the recommended choice.
Petrolatum, mineral oil and dimethicone are FDA-recognised skin protectants for general/adult OTC use — inert, non-sensitising occlusives that lock in moisture and support the barrier. They're the workhorses of baby balms and diaper creams, and long clinical practice treats them as well tolerated on infant skin, though dedicated infant-specific safety trials for these individual ingredients are thin — pediatric skin-barrier research flags a broader gap in infant absorption data generally, not a specific concern with these three.
Colloidal oatmeal soothes and supports the barrier, and has been used in infants and young children with eczema with no signal of increased oat sensitisation or food-allergy risk. That said, reviewers still describe the pediatric evidence base as 'under investigation' — promising so far, not yet a large confirmed trial base. A reasonable, low-risk ingredient to see on a baby product.
Glycerin is a gentle humectant and an FDA-recognised skin protectant (21 CFR 347.10); allantoin is likewise an FDA-recognised OTC skin-protectant active (0.5–2%, same regulation). Panthenol (pro-vitamin B5) has been tested directly in infants — a 4-week study in infants and toddlers 3–36 months found a panthenol-containing emollient well tolerated with good skin acceptability. These are the kind of simple, fragrance-free moisturising ingredients pediatric guidance points parents toward.
We match each ingredient on your label against a hand-curated rule set drawn from pediatric-authority guidance (American Academy of Pediatrics / HealthyChildren.org, the U.S. FDA, EU SCCS opinions and the Cosmetic Ingredient Review) and peer-reviewed pediatric-dermatology and toxicology papers — every flag links its source. The grading reflects how a baby differs from an adult: an immature skin barrier absorbs more, and a high skin-surface-to-body-weight ratio magnifies systemic dose. 'Avoid' is for acute toxins and things guidance says to keep off infants; 'caution' is for allergens and dose- or age-dependent ingredients; 'generally fine' is for the emollients and mineral filters pediatric guidance actually recommends. Matching is literal substring matching on ingredient names.
This is a conservative screen, not a clearance. It can't see concentration, whether a product is rinse-off or leave-on, or where on the body it goes — all of which change the answer (a trace pH-adjusting acid in a wash is not a leave-on acid treatment). Newborns and preterm infants have far more permeable skin than older babies, so 'caution' items matter most in the first weeks and on broken or eczematous skin. An ingredient we don't have a rule for is NOT a guarantee of safety — it may just be unstudied for infants. And this tool knows nothing about your baby's history, allergies, or a doctor's specific instructions.
Last verified July 2026. Citations and regulatory status (FDA rulings, EU bans, retracted studies) can change over time — every source link on this page is checked weekly for dead or moved URLs, and this lens is re-audited on its underlying evidence at least once a year. See our full bibliography →