Comprehensive policy on CAM and TM is lacking in most countries, including the United States. According to the 1994 Dietary Supplement, Health, and Education Act, the . Food and Drug Administration cannot require proof that dietary supplements and herbal products are safe and effective before they are sold, although it is charged with requiring good man- ufacturing practices. The quality of herbal products is not reg- ulated, and herbal products typically differ from source to source and from batch to batch in terms of their component ingredients and respective amounts and in terms of whether they contain contaminants. In the United States, no single entity is responsible for all aspects of.
