https://www.selleckchem.com/pr....oducts/l-ascorbic-ac
Significant differences in serum concentrations were evident for all analytes across the four levels (p≤0.003).TSH measurements were significantly different (p0.0001) among research-only immunoassays. Tg concentrations were elevated in research-only immunoassays vs. Federal Drug Administration-approved automated immunoassay and LC-MS/MS. Presence of Tg antibodies increased differences between automated immunoassay and LC-MS/MS. The analyte concentrations' changes consistent with the l