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Hidden ingredients / Review of other studies
None of the products used by the four affected children was ever chemically analyzed; the researchers could only assume that a product labeled as containing lavender oil actually met the international composition standard.
Strong evidence.
Caveats
Stated by the authors as a limitation; an industry letter later claimed one named cologne contained diethyl phthalate and no lavender oil, which has also never been independently verified.
Source: Ramsey 2019, The Journal of Clinical Endocrinology & Metabolism Link to this fact
Information, not medical advice. See also: myths we won’t tell you.