Quality Standards

Quality is a process, not a promise made lightly.

Yen’s Herb is developing Xin Xue Yu Zu San with careful attention to ingredient specifications, consistency, preparation, packaging, and clear communication.

Current development status

The formula, manufacturing specifications, packaging, label language, safety review, and regulatory review remain in progress. The product is not currently available for purchase.

Transparent communication

We distinguish traditional use, clinical observation, scientific evidence, and approved public claims. Product details will be updated when final manufacturing, quality, and regulatory decisions are complete.