March 2026 in “Obesity Surgery” This study found that hair loss after metabolic and bariatric surgery peaks at 3 months and improves by 6 months, with iron deficiency and female sex being strong predictors of hair loss.
December 2025 in “Obesity Surgery” In this study, researchers found that patients undergoing one-anastomosis gastric bypass experienced a greater incidence of low serum zinc levels and related symptoms, such as hair loss and delayed wound healing, compared to those undergoing sleeve gastrectomy.
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January 2013 in “Surgical Science” This study observed that vitamin and iron deficiencies were similarly prevalent in the first post-surgical year for patients undergoing sleeve gastrectomy and Roux-en-Y gastric bypass, except for more frequent vitamin B6 deficiency in sleeve gastrectomy patients.
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October 2017 in “BMJ Open” This article outlines the first prospective cohort study examining whether bariatric surgery can induce satisfactory weight loss in obese Koreans, with no new results reported yet.
July 2024 in “International Journal of Dermatology Venereology and Leprosy Sciences” This study discusses that many patients experience temporary hair loss after bariatric surgery, potentially due to rapid weight loss, surgery stress, and nutritional deficiencies, including shortages of iron, zinc, and other nutrients crucial for hair health.