Selenium is a trace mineral that plays a big role in protecting your cells from damage and supporting your immune system. It also helps your thyroid gland produce hormones that regulate energy, mood, and metabolism.

You only need a small amount—about 55 mcg daily for most adults—but deficiency can lead to fatigue, brain fog, and even weakened immunity. It’s especially important for people with thyroid conditions like Hashimoto’s or Graves’ disease.

Selenium is found in Brazil nuts, seafood, and whole grains, but if your diet is low in these foods, a supplement might help. Just don’t overdo it—too much selenium can be toxic and lead to side effects like hair loss or digestive issues.

Always check labels and avoid high-dose supplements unless prescribed. Pairing selenium with zinc and vitamin E may also boost its effectiveness.

To choose a balanced and safe selenium product, explore health platforms like bulk supplements for dosage guides and product reviews. It’s small but mighty—just the way your body likes it.