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Yeast β-glucan is a polysaccharide present in the cell wall of yeast, and it has immunomodulatory activity. Yeast β-glucan products are obtained through cell wall disruption, enzymatic hydrolysis, acid-base treatment, separation, purification, drying, and packaging. Yeast β-glucan is a polysaccharide with a β-1,3-glucan main chain and a small amount of β-1,6-glucan branches forming a three-dimensional helical structure. Glucans are widely present in various fungi and plants, such as brewer's yeast, shiitake mushrooms, reishi mushrooms, oats, etc., and are the main functional substances. Due to different sources and different configurations, the activity of β-glucan varies greatly.
Yeast β-glucan is a polysaccharide composed of glucose, and it is mainly linked together through β-1,3 bonds, which is the connection form of the glucose chain.
| Item | Specification | Result |
|---|---|---|
| Assay(Beta D 1,3/1,6 Glucan) | ≥80% | 81.15% |
| Protein | ≤5% | 2.12% |
| Appearance | Light yellow fine | Conform |
| Odor | Characteristic | Conform |
| Tasted | Characteristic | Conform |
| Sieve Analysis | 100% pass 80 mesh | Conform |
| Loss on drying | ≤7% | 4.46% |
| Ash | ≤9% | 3.86% |
| Pb | ≤1mg/kg | 0.08mg/kg |
| Hg | ≤2mg/kg | 0.2409mg/kg |
| Cd | ≤0.1mg/kg | 0.01mg/kg |
| Bulk Density | ≤1.0mg/kg | 0.09mg/kg |
| Total plate count | 30-50g/100ml | 41.41g/100ml |
| Yeast & mould | ≤10000cfu/g | <100cfu/g |
| Salmonella | <100cfu/g | <10cfu/g |
| E.Coli | Negative | Negative |
| Staphylococcus | Negative | Negative |
| Conclusion | Conforms with the standards | |
