Selenium 200 mcg by Pure Encapsulations

If you’re looking for a selenium supplement because your diet is light on seafood and Brazil nuts, or you live in a low‑selenium soil region, this fits. It’s most relevant if your thyroid labs show autoimmune activity, especially Thyroid Peroxidase (TPO) antibodies, alongside TSH and Free T4 monitoring. Adults with low Selenium, Serum on testing, and men with borderline sperm motility, are also reasonable candidates. If your intake is already high from a multivitamin plus frequent Brazil nuts, adding more is unnecessary.

Selenomethionine is selenium bound to the amino acid methionine, which the gut absorbs efficiently and the body stores in proteins, creating a steady reserve. Your cells use selenium to build selenoproteins, including glutathione peroxidase (an enzyme that neutralizes harmful peroxides) and deiodinases (enzymes that convert thyroid hormone T4 into the active T3). That antioxidant and thyroid-enzyme support explains why some trials show meaningful drops in TPO antibodies within 3–6 months. It’s not a cancer-prevention pill, and large trials haven’t supported taking selenium for that purpose.

Take one capsule with a meal, once daily. Track total intake from all sources, including multivitamins and Brazil nuts, to avoid overshooting. If you’re targeting thyroid autoimmunity, recheck TPO antibodies and thyroid function in 3–6 months. For long-term daily use, periodic Selenium, Serum testing is sensible. Pregnancy and breastfeeding typically call for lower supplemental amounts than 200 mcg, so coordinate with your obstetric clinician.

Skip or reduce selenium if you already consume Brazil nuts frequently or take another selenium supplement. Signs of excess include hair shedding, brittle nails, a garlic-like breath odor, and stomach upset. If you have chronic kidney disease, are on cancer therapy, or have type 2 diabetes or elevated A1c, discuss dosing with your clinician before daily 200 mcg, since high total intake has been linked to higher diabetes risk in some populations. Keep iodine intake adequate, but don’t megadose either nutrient.

Does it help immunity? Selenium supports enzymes that manage oxidative stress, but it’s not an immune cure-all. Can you combine it with thyroid medicine? Yes, just take levothyroxine on an empty stomach as prescribed and this with food later. How fast will I notice changes? Lab shifts, like lower TPO antibodies, are measured over months, not days.