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. 2017 Sep 26;318(12):1150–1160. doi: 10.1001/jama.2017.13705

Figure 2. Concentrations of Total Thyroxine (T4) and Total Triiodothyronine (T3) From the 6 Study Participants.

Figure 2.

Taking 10 mg/d of biotin for 7 days was associated with falsely increased results from the Roche cobas e602 Total T3 (P =.001). A unique color is used for each participant across all panels. The dotted lines represent the lower and the upper reference range for each assay. Architect indicates Abbott Architect 2000; Centaur, Siemens Centaur XP; cobas, Roche cobas e602; Vista, Siemens Vista Dimension 1500; and Vitros, OCD Vitros 5600.  For SI conversion factors, see the Methods section.