Bioavailable form: Natural Factors SelenoExcell 200 mcg is a bioavailable form of organically bound selenium yeast* Broad spectrum of support: As an antioxidant, selenium helps stimulate and protect the immune system by supporting antibody production.* This important mineral also helps maintain a healthy heart and liver, and promotes healthy cells.* Local, organic, and Non-GMO: Natural Factors Farms grows with true species non-hybridized, non-GMO seeds, including many open-pollinated varieties without chemical fertilizers or pesticides Just the right size: We are one of the only nutritional companies to have our own organic farms, extraction, encapsulation, and production facilities as well as our own labs and research facilities Third-party certified: Independently tested for GMOs and over 800 contaminants using advanced technology such as mass spectrometry to ensure purity and potency