Strongest evidence
The most concerning ingredient most people have never read on a label
Phthalates are the one ingredient on this shelf you have probably never seen on an ingredient list. That is not because they are absent from cosmetics. It is because of the way US labelling law works: they do not have to be disclosed.
The route most cosmetic phthalates take into your skin is through the word "fragrance" — a single regulatory term that can hide a hundred or more individual compounds, including phthalates used as solvents and stabilisers. Which means the fragrance question and the phthalate question are the same question, and you cannot answer either one from the label alone.
What phthalates are
Phthalates are a family of plasticising compounds — chemicals used to make plastics flexible and to dissolve and stabilise other compounds in liquid formulations. In cosmetics, the most common is diethyl phthalate (DEP), which functions primarily as a fragrance solvent and fixative.
You'll occasionally see phthalates listed by name in nail polish (where they're used to prevent chipping), but the larger and more pervasive cosmetic exposure route is fragrance. When you see "fragrance" or "parfum" on a US ingredient list, there's a meaningful chance phthalates are inside it — undisclosed, unquantified, and not flagged in any way for the consumer.
The endocrine concern
The reason phthalates have become a major regulatory issue in the EU and a flagged area of research in the US comes down to their interaction with the endocrine system. Specifically, several phthalates have demonstrated anti-androgenic activity — they interfere with the body's normal use of testosterone and other male hormones during development.
This isn't a fringe finding. The endpoints studied include sperm motility and concentration in adult men, anogenital distance in male infants (a marker of androgen disruption during fetal development), and other reproductive parameters. The literature is consistent enough that the EU has restricted or banned several phthalates in cosmetics, and the US Consumer Product Safety Improvement Act restricts phthalates specifically in children's products.
Key studies
Swan et al. 2005, Environmental Health Perspectives. Phthalate exposure in pregnant women was associated with altered anogenital distance in male infants — a marker of androgen disruption during fetal development. One of the most cited studies establishing reproductive toxicity concern. → PubMed
Hauser et al. 2006, Epidemiology. Urinary phthalate metabolites in adult men were associated with reduced sperm motility and concentration, adjusting for confounders. → PubMed
Calafat et al. 2004, Environmental Health Perspectives. Found phthalate metabolites in the urine of nearly all participants in a representative US population sample. The ubiquity of exposure from personal care products underlines the aggregate dose concern. → PubMed
The labelling gap
Under current US cosmetic labelling rules, "fragrance" or "parfum" is a single-line ingredient that can contain 10 to 300+ compounds. None of those individual components need to be disclosed. Phthalates used as solvents or fixatives within fragrance fall under this exemption. A consumer reading the label has no way to know if phthalates are in a product.
The European Union takes a different approach — 26 specific fragrance allergens must be disclosed above certain concentrations, and several phthalates are restricted or banned outright. The US has made no equivalent change.
This is the part worth carrying away: the labelling gap is the story. A product carrying undisclosed fragrance is a product whose phthalate content nobody outside the manufacturer can verify — including the brand selling it to you, unless it has asked.
Where our own label lands
We are not going to claim a fragrance-free line, because we do not have one.
Sixteen of our seventeen formulas contain no added fragrance. One does: the Renewal Cream lists Fragrance from its base formula, disclosed on its label and on its page. Several other formulas contain aromatic plant oils chosen for function — tea tree in the Clearing Cleanser, citrus peel oils in the Balance Gel and Dew Cream, frankincense in the Face Oil, lemon oil in the Brightening Bar.
So the honest version of our position on phthalates has two parts. Where there is no added fragrance — sixteen formulas — the primary cosmetic route for phthalate exposure is closed by default, and we add no phthalates in any other capacity: not as solvents, not as fixatives, not as plasticisers, anywhere in the line. Where there is added fragrance — the Renewal Cream — the same labelling gap this article is about applies to us. We have asked our manufacturing partner about the composition of that fragrance and about a fragrance-free version of the base. Until we have an answer, the accurate thing to say is that we do not know, and we would rather tell you that than print a claim we cannot check.
That is the whole point of the article. The gap is real, it is legal, and it does not stop at the edge of our own catalogue.
Last reviewed: May 2026. Sources: Swan et al. 2005, Hauser et al. 2006, Calafat et al. 2004.