Possible Clues:

• Rx org.
• Agcy. that sets (often surprisingly high) maximum standards for the amounts of the circled materials in edible goods
• Org. overseeing trials
• Substance-banning agcy.
• Medicine approval org.
• Recalling org.
• Govt. watchdog for medicines
• Pharma regulator
• Dept. of Health and Human Services div.
• Safety org.