Skincare Ingredients to Avoid (and Why)
A short list of personal-care ingredients with credible evidence of harm — and the cleaner alternatives that actually work.
Key takeaways
- 1.Hazard is not the same as risk — dose and exposure matter.
- 2.Formaldehyde releasers and undisclosed fragrance are the strongest reasons to switch.
- 3.Reef-safe usually means non-nano mineral filters.
- 4.Full ingredient disclosure is the sign of a brand worth trusting.
How to read this list
Hazard is not the same as risk. An ingredient can be flagged by databases like EWG Skin Deep even at exposure levels well below regulatory limits. The list below covers ingredients with the strongest evidence of concern at normal use — backed by peer-reviewed research and, where applicable, regulatory action.
The short list
Parabens (methyl-, propyl-, butyl-, isobutyl-): endocrine disruptors at the high end of the evidence spectrum. Banned in some EU products. Alternatives: phenoxyethanol, sodium benzoate, ethylhexylglycerin.
Formaldehyde releasers (DMDM hydantoin, quaternium-15, imidazolidinyl urea, diazolidinyl urea): release formaldehyde over time; IARC class 1 carcinogen.
Phthalates (DBP, DEHP, often hidden in "fragrance"): endocrine disruptors with reproductive-toxicity evidence.
Triclosan and triclocarban: antibacterials banned from US soaps in 2016. Disrupt thyroid function, contribute to antibiotic resistance.
Oxybenzone and octinoxate: chemical UV filters with coral-bleaching evidence. Banned in Hawaii sunscreens. Alternatives: non-nano zinc oxide, titanium dioxide.
Synthetic "fragrance" without disclosure: a single word can hide hundreds of chemicals, including phthalates and skin sensitizers. Look for brands that fully disclose fragrance components.
What to look for instead
EWG Verified, COSMOS Organic, Made Safe, and brands that publish a full ingredient policy. The Skin Deep app lets you scan any product's ingredient list and see hazard ratings on the spot.
Frequently asked questions
Should I throw out products containing these ingredients?+
No. Finish what you have, then choose differently next time — discarding usable products creates waste without meaningful health benefit.
Is 'fragrance' always a problem?+
Not always, but it can hide dozens of undisclosed components including sensitisers. Brands that list fragrance components individually are the safer bet, especially for reactive skin.