SelenoExcell (High-Selenium Yeast)

SelenoExcell High-Selenium Yeast is a selenium-enriched Saccharomyces cerevisiae yeast product standardized to contain approximately 1,000–2,000 mcg selenium per gram of yeast (commercial preparations are typically diluted to 1,000 mcg/g). The predominant selenium form is L-selenomethionine, comprising approximately 55–60% of total selenium content, with additional organic selenium species including selenocysteine (~10–15%), Se-methylselenocysteine, and other selenoproteins (~25–30%), making it compositionally superior to inorganic selenium salts. Inorganic selenium (selenate/selenite) residuals are minimal, typically less than 2% of total selenium. As a yeast-based matrix, the product also contains: protein at approximately 40–50% dry weight (including all essential amino acids), carbohydrates (primarily beta-1,3/1,6-glucans) at approximately 25–35% dry weight contributing immunomodulatory activity, and B-vitamins inherent to yeast including B1 (thiamine ~0.3 mg/g), B2 (riboflavin ~0.04 mg/g), B3 (niacin ~0.4 mg/g), B6 (pyridoxine ~0.04 mg/g), and folate (~0.02 mg/g). Zinc is naturally present at trace levels (~0.05–0.1 mg/g). Bioavailability: Organic selenium from L-selenomethionine in SelenoExcell demonstrates approximately 85–90% absorption efficiency compared to roughly 50–70% for inorganic sodium selenite, attributed to active amino acid transport mechanisms. Selenium is incorporated directly into body proteins as a methionine substitute, enabling tissue storage and gradual release. Recommended supplemental doses typically provide 100–200 mcg selenium per serving.