Does this contain L-selenomethionine or the DL form?

Yes, selenomethionine is verified using USP methodologies. Thorne Research uses inductively coupled plasma optical emission spectrometry (ICP-OES) and inductively coupled plasma mass spectrometry (ICP-MS) to analyze each incoming batch of L-selenomethionine used in this product. SOPs are in compliance with USP standards. Clean Break Seller · March 4, 2015

IS this verified by USP?

Yes, selenomethionine is verified using USP methodologies. Thorne Research uses inductively coupled plasma optical emission spectrometry (ICP-OES) and inductively coupled plasma mass spectrometry (ICP-MS) to analyze each incoming batch of L-selenomethionine used in this product. SOPs are in compliance with USP standards.

Is this product yeast-free?

Yes. Though I switched from this brand to "NOW" at 100 mcg (take 2 instead) and it states on the front of the bottle "Yeast Free".

From what source is this seleniomethionine?

I don't know. But recommended by a certified nutritionist.

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🛡️ Elevate your thyroid game with the clean power of Thorne Selenium!

THYROID GUARDIAN - Clinically backed selenium formula to maintain healthy thyroid function and metabolic balance.
COMPACT CONVENIENT - 60 easy-to-take capsules in a sleek, travel-friendly 4.32 x 7.54 cm bottle—wellness on the go.
ELITE ATHLETE TRUSTED - Chosen by 100+ pro teams and partnered with Mayo Clinic for cutting-edge health research.
PURE CLEAN CONFIDENCE - Crafted without gluten, soy, dairy, nuts, or shellfish—perfect for sensitive, health-conscious professionals.
PRECISION POWERED WELLNESS - Each capsule delivers a potent 200mcg of bioavailable selenomethionine for optimal thyroid support.

Thorne Selenium 200mcg capsules provide a pure, allergen-free source of selenomethionine designed to support healthy thyroid function and promote vibrant skin and hair. Trusted by professional athletes and developed in partnership with Mayo Clinic, this supplement offers a clean, potent boost to your daily wellness routine.

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