Method: LC-MS/MS (Liquid Chromatography/Tandem Mass Spectrometry) with creatinine normalization by Jaffe Reaction (CLIA 17D0919496); not cleared or approved by the FDA. Results reported in µg/g creatinine. Not a stand-alone diagnosis; should be interpreted in clinical context.
A derived biomarker is a value that is calculated from other directly measured biomarkers rather than being measured directly in the lab.
Key benefits of Butylparaben (BuP) testing
- Restricted-chain paraben exposure tracking
- most potent standard paraben burden assessment
What is Butylparaben (BuP)?
Butylparaben (BuP) is the largest-chain paraben in the standard panel and has been restricted or banned in certain product categories in some countries. It appears in cosmetics, personal care products, and some food applications. Measured via LC-MS/MS.
Why is Butylparaben (BuP) important?
BuP demonstrates greater estrogenic potency than shorter-chain parabens in laboratory research, though it typically appears at lower concentrations in human samples. Detectable BuP may warrant review of product labels for hidden paraben exposure, particularly in products not labeled paraben-free.
What insights will I get?
Your BuP level may indicate use of products still containing this compound, particularly older formulations without paraben-free labeling. Discuss elevated BuP alongside other paraben levels with your care team to assess your total paraben burden from cosmetics and personal care items.





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