Traditional Chinese medicines have played an important role in clinical therapy and have been attracting more and more attention for their complementary therapeutic effects to western medicines with low toxicity and few to no complications. With the use of traditional herbal medicines gaining popularity worldwide, the questions of purity and safety of these supplements or natural products have become a concern for public health authorities. The FDA, WHO, and the Chinese Pharmacopoeia have begun generating reliable and accurate analytical techniques to standardize quality control in manufacturing of these supplements to insure the correct identity, authenticity, and lot to lot consistency.