SynthesisObesity surgery2021
Hair Loss After Metabolic and Bariatric Surgery: a Systematic Review and Meta-analysis.
Synthesis in Obesity surgery, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
16 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Hair Loss and Metabolic and Bariatric Surgery: An Updated Systematic Review and Meta-analysis.Obesity surgery · 2025Pooled it
- [Hair loss during treatment of obesity: current state of the problem and potential solutions].Problemy endokrinologii · 2026Review
- Long-Term Weight Loss Outcomes Following Sleeve Gastrectomy and Their Association with Diet Quality, Postoperative Complications, and Sociodemographic Factors: A Retrospective Cohort Study in Jeddah, Saudi Arabia.Journal of clinical medicine · 2026Article
- Comparative Analysis of Postoperative Hair Loss and Micronutrient Deficiencies After One-Anastomosis Gastric Bypass Versus Sleeve Gastrectomy.Obesity surgery · 2026Article
- Elevated serum pepsinogen level predicts postoperative nausea and vomiting and pain in females with obesity following laparoscopic sleeve gastrectomy.International journal of obesity (2005) · 2025Article
- Correlation between changes of amino acid spectrum and alopecia in patients with obesity undergoing bariatric surgery: a prospective cohort study.Frontiers in nutrition · 2025Article
- Global collaborative research in metabolic and bariatric surgery (GCRMBS): current status and directions for the future.BMC surgery · 2024Review
- Post bariatric surgery complications, nutritional and psychological status.Asia Pacific journal of clinical nutrition · 2024Observational
- Association of Obesity and Bariatric Surgery on Hair Health.Medicina (Kaunas, Lithuania) · 2024Review
- The Effect of Bariatric Surgery on Menstrual Abnormalities in Saudi Women: A Cross-Sectional Study.Cureus · 2024Article
- Nutrition and Patient Follow-up in Bariatric Surgery.The Eurasian journal of medicine · 2023Article
- Bariatric and metabolic surgery in patients with low body mass index: an online survey of 543 bariatric and metabolic surgeons.BMC surgery · 2023Article
- Lived Experience after Bariatric Surgery among Patients with Morbid Obesity in East Coast Peninsular Malaysia: A Qualitative Study.International journal of environmental research and public health · 2022Article
- Article
- Bile acids, gut microbiota and metabolic surgery.Frontiers in endocrinology · 2022Review
- Which nutritional prognosis is better? comparison of the three most commonly performed bariatric surgeries: A systematic review and network meta-analysis.Frontiers in surgery · 2022Review
Corrections and comments
- Commented on by
- Commented on by
Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundHair loss is a common complication after metabolic and bariatric surgery (MBS). There is a lack of published systematic review in the scientific literature on this topic. The aim of this study was to perform a systematic review and meta-analysis on hair loss after MBS in accordance with Preferred Reporting Items for Systematic reviews and Meta-Analysis (PRISMA) guidelines.
methodsPubMed, CINAHL, EMBASE, Web of Science, SCOPUS, and four Chinese databases were searched. Data were pooled using Review Manager 5.3 and Stata 12.0, and subgroups were performed if necessary and feasible.
resultsA total of 18 studies (n = 2538) were included. The pooled results showed that the incidence of hair loss after MBS was 57% (95% CI 42-71%). It decreased with longer follow-up times. Hair loss was significantly more common in younger (mean difference (MD), - 2.45; 95% CI, - 4.26 to - 0.64; p = 0.008) women (OR, 3.87; 95% CI, 0.59 to 17.59; p = 0.08). Serum zinc (standardized mean difference (SMD), - 1.13; 95% CI, - 2.27 to 0.01, p = 0.05), folic acid (SMD = - 0.88, 95% CI - 1.29 to - 0.46, p < 0.0001), and ferritin levels (SMD, - 0.22; 95% CI, - 0.38 to - 0.05; p = 0.01), but not serum iron and vitamin B
conclusionsHair loss is common after MBS especially in younger women, and those with low serum levels of zinc, folic acid, and ferritin. Prospective studies on larger cohorts are needed.
Indexed as
Identifiers
What Socratic holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.