Chinese herbs are major part of TCM. The herbs classified inside Chinese herbology has been tested and proven useful for thousands of years. The herbs are organic and natural substances. Some of them are daily life's fruits and plants. The TCM doctor combines different herbs together to treat different problems. The traditional patent formulas are collection of experiences of thousands of year's practice. They are used for all kinds of diseases and problems including cancers, stress, and depression, with very few or no side effects.