Back to Biomarkers

Perfluoromethylheptane Sulfonic Acid Isomers (Sm-PFOS) details

What Perfluoromethylheptane Sulfonic Acid Isomers (Sm-PFOS) shows

Perfluoromethylheptane sulfonic acid isomers (Sm-PFOS) are branched-chain forms of perfluorooctane sulfonic acid (PFOS), a widely used PFAS chemical. Commercial PFOS was a mix of straight and branched forms, so labs may report them separately and add them for total PFOS. This test measures the branched isomers in your serum to help estimate your exposure to PFOS from water, food and treated products. PFAS leave the body slowly, so the level mainly reflects exposure over months to years. A higher result means more exposure; research links higher PFAS levels with effects such as raised cholesterol, but a result cannot show that it caused a symptom. It is read alongside the other PFAS on the panel.

Tests that include Perfluoromethylheptane Sulfonic Acid Isomers (Sm-PFOS)

Labcorp Not offered
ConsultationsConsultation

Not sure how to read your results? We can help.

Schedule a consultation with a Hormunity specialist. Weโ€™ll walk through every marker, interpret what it means for you, and map out the next steps for your care.

Book a specialist
Cart

Your cart is empty

Fill your cart with amazing items.

Visit shop
Select date and time
—

Pick a date to see times.

Personal details

Enter the details of the individual who will take the test.

Phone number*

By continuing, you agree to our Terms & Conditions and Privacy Policy