Which feature describes good quality Bai Zhi regarding its center?

• A. No holes, black spots, or oil channels in its center
• B. Holes and oil channels in center
• C. Center white with red spots
• D. Center hollow with irregular edges

Answer: (A)

When evaluating Bai Zhi, focus on the center tissue to judge quality. A center that is solid and clean indicates the root has been properly dried and stored, preserving its internal structure and active components. The best hallmark of good quality is a center without holes, black spots, or oil channels. Holes or a hollow center signal internal damage or degradation, which reduces potency. Black spots suggest decay or fungal contamination, and oil channels in the center imply internal alteration or processing that compromises quality. A center that is hollow with irregular edges or one described as center white with red spots similarly points to inferior material. Keeping the center free of these defects helps ensure consistent potency and reliability of Bai Zhi for its intended effects.