LGC Maine Standards, Cumberland Foreside, Maine, has enhanced its Validate THY linearity and calibration verification kit by adding free triiodothyronine (FT3) as a component of total triiodothyronine (TT3). The kit, in a human serum matrix, evaluates cortisol, FT3, free thyroxine, thyroid stimulating hormone, TT3, and total thyroxine. The ready-to-use kit offers five distinct concentrations covering the reportable range. Users can dispense the product from each dropper bottle directly into five sample cups, and run in replicates. The kit enables clinical laboratories to complete their required thyroid linearity and calibration verification and maximize the reportable range while minimizing manual dilutions. For more information, visit LGC Maine Standards.