Abstract:
BACKGROUND:Iodine supplementation during pregnancy in areas with mild-to-moderate iodine deficiency is still debated. METHODS:A single-center, randomized, single-blind and placebo-controlled (3:2) trial was conducted. We enrolled 90 women before 12 weeks of gestation. From enrollment up until 8 weeks after delivery, 52 women were given an iodine supplement (225 ug/day, potassium iodide tablets) and 38 were given placebo. At recruitment (T0), in the second (T1) and third trimesters (T2), and 8 weeks after delivery (T3), we measured participants' urinary iodine-to-creatinine ratio (UI/Creat), thyroid function parameters (thyroglobulin (Tg), TSH, FT3, and FT4), and thyroid volume (TV). The newborns' urinary iodine concentrations were evaluated in 16 cases. RESULTS:Median UI/Creat at recruitment was 53.3 ug/g. UI/Creat was significantly higher in supplemented women at T1 and T2. Tg levels were lower at T1 and T2 in women with UI/Creat ≥ 150 ug/g, and in the Iodine group at T2 (p = 0.02). There was a negative correlation between Tg and UI/Creat throughout the study (p = 0.03, r = -0.1268). A lower TSH level was found in the Iodine group at T3 (p = 0.001). TV increased by +Δ7.43% in the Iodine group, and by +Δ11.17% in the Placebo group. No differences were found between the newborns' TSH levels on screening the two groups. CONCLUSION:Tg proved a good parameter for measuring iodine intake in our placebo-controlled series. Iodine supplementation did not prove harmful to pregnancy in areas of mild-to-moderate iodine deficiency, with no appreciable harmful effect on thyroid function.
journal_name
Nutrientsjournal_title
Nutrientsauthors
Censi S,Watutantrige-Fernando S,Groccia G,Manso J,Plebani M,Faggian D,Mion MM,Venturini R,Andrisani A,Casaro A,Vita P,Avogadro A,Camilot M,Scaroni C,Bertazza L,Barollo S,Mian Cdoi
10.3390/nu11112639subject
Has Abstractpub_date
2019-11-04 00:00:00issue
11issn
2072-6643pii
nu11112639journal_volume
11pub_type
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