Purity of Husk: The most important quality parameter is the purity of the husk. Higher purity (up to 99%) fetches a better price in the market. Husk is obtained by milling the Isabgol seeds.
Seed Color: Good-quality Isabgol seeds are light brown to off-white in color. Discolored or dark seeds indicate inferior quality.
Husk Yield: The proportion of husk obtained from seeds is an important parameter. Generally, 25-30% husk yield is considered good.Aroma and Taste: The husk should be odorless and tasteless, as any unusual smell or taste indicates contamination or spoilage.