Wellmune^® F3005 is a high-purity β-1,3/1,6-glucan extracted from the cell wall of baker's yeast (Saccharomyces cerevisiae), globally recognized as an ingredient that supports immune function. Numerous clinical trials have reported its ability to enhance resistance to daily stressors, reduce feelings of fatigue, and provide defensive support against seasonal discomfort. Furthermore, research on its potential to suppress allergic reactions is advancing, making it a material expected to find applications across the entire field of immunology. With excellent safety and evidence, it is a functional ingredient suitable for a wide range of product designs, from supplements to general foods.