Table 1.

Gluten test results of raw materials used in the manufacture of Synthroid^® tablets

Raw material/excipient	Gluten concentration (ppm)
Levothyroxine sodium, USP	<3.0
Talc, USP	<3.0
Lactose monohydrate, NF	<3.0
Acacia, NF	<3.0
Sugar, confectioner’s, NF	<3.0
Magnesium stearate, NF/EP	<3.0
Povidone, USP	<3.0
Dye, Yellow D&C No. 10, Aluminum Lake	<3.0
Dye, Blue FD&C No. 1, Aluminum Lake	<3.0
Dye, Yellow FD&C No. 6, Aluminum Lake	<3.0
Dye, Blue FD&C No. 2, Aluminum Lake	<3.0
Dye, Red FD&C No. 40, Aluminum Lake	<3.0
Dye, Red Lake Blend	<3.0
Dye, Brown Lake Blend	<3.0
Dye, Olive Lake blend	<3.0

EP European Pharmacopoeia, FD&C Federal Food, Drug, and Cosmetic Act, NF National Formulary, USP US Pharmacopeia