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Changes in Urinary Iodine Levels Following Bariatric Surgery
Carol Chiung-Hui Peng1, Cheng Han2, Nipawan Waisayanand3
1Section of Endocrinology, Diabetes, Nutrition & Weight Management, Boston University Chobanian & Avedisian School of Medicine, Boston, Massachusetts, USA; Hualien Tzu Chi Hospital, Haulien City, Taiwan.
Summary
Bariatric surgery in iodine-sufficient areas does not lead to iodine deficiency or affect thyroid function. Urinary iodine concentrations and thyroid stimulating hormone levels remained within normal ranges post-surgery.
Area of Science:
- Endocrinology
- Bariatric Surgery Outcomes
- Nutritional Science
Background:
- Obesity is a major health concern in the U.S.
- Bariatric surgery is effective for weight loss but can cause micronutrient deficiencies.
- Iodine is crucial for thyroid hormone synthesis.
Purpose of the Study:
- To assess changes in urinary iodine concentration (UIC) after bariatric surgery.
- To evaluate the impact of bariatric surgery on iodine status and thyroid function.
Main Methods:
- 85 adults undergoing laparoscopic sleeve gastrectomy or Roux-en-Y gastric bypass were studied.
- Urinary iodine concentration and serum thyroid stimulating hormone were measured at baseline and 3 months post-surgery.
- Dietary iodine intake and multivitamin use were also recorded.
Main Results:
- Median UIC significantly increased post-surgery (201 to 334.5 μg/L).
- Mean body mass index decreased significantly (44.0 to 35.8).
- Mean thyroid stimulating hormone levels decreased significantly (1.5 to 1.1 uIU/mL).
- No significant differences in outcomes were observed between surgical types.
Conclusions:
- Bariatric surgery in iodine-sufficient regions does not cause iodine deficiency.
- Clinically significant changes in thyroid function were not observed post-bariatric surgery.
- Gastrointestinal alterations from different bariatric procedures do not significantly impact iodine status.
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