Since black yeast β-glucan has the strongest properties among immune polysaccharides and produces no adverse effects even though it is used for a long time, health foods made by using it are recognized worldwide as immunoactivators and are widely used for the prevention and treatment of cancer and other diseases.
The O-il Health Food Manufactory produces various kinds of health foods using β-glucan.
Notably, black yeast β-glucan solution (patent registration number: 76338) and hongsam and black yeast β-glucan solution (patent registration number: 79446) are gaining popularity.
A mixture of hongsam made by processing 6-year-old Kaesong Koryo insam with black yeast β-glucan, the hongsam and black yeast β-glucan solution is several times more effective than black yeast β-glucan solution.
In addition, the manufactory produces Ganoderma extract granules and functional health foods such as Ganoderma tea and Cordyceps sienensis tea.
Its products have been highly appreciated at exhibitions held at home and abroad.
Functional Health Drink: Nano-gold Water
Choe Kwang Chol, a researcher at the Jangsubong Chemist’s, developed nano-gold water, a functional health drink. The nano-gold
February 23, 2026
Choe Kwang Chol, a researcher at the Jangsubong Chemist’s, developed nano-gold water, a functional health drink. The nano-gold
