To ban the sale of L-Tryptophan until the Secretary of Health and Human Services determines that it is not injurious to health.

Requires L-Tryptophan to be considered an adulterated food under specified provisions of the Federal Food, Drug, and Cosmetic Act and barred from sale under the Act until the Secretary of Health and Human Services determines that it does not cause eosinophilia-myalgia syndrome and is not otherwise injurious to health.