The effect of celiac disease and gluten-free diet on pubertal development: a two-center study

Objectives We aimed to assess whether age at menarche and pubertal development (Tanner stage) are related to gluten-free diet (GFD) adherence, hormonal status, micro-nutrient levels and body mass index (BMI) in children with celiac disease (CD). Methods In this two-center, cross-sectional study, CD patients and healthy individuals were studied. CD patients were re-evaluated after 1 year of follow-up. Height, weight, Tanner stage, age at menarche and diet compliance were recorded. Blood samples for anti-tissue transglutaminase IgA (TTG), pituitary gonadotropins, gonadal hormones, prolactin and micronutrients (folate, vitamin B12, vitamin D, ferritin, iron and, iron-binding capacity [IBC]) were assayed. Results Consecutive age- and sex-matched 228 celiac patients (12.92 ± 2.35 years; 67.9% female) and 135 non-celiac healthy individuals (12.77 ± 2.25 years; 65.2% female) were studied. Tanner stage was significantly higher in the control group for both girls and boys (p < 0.05). The mean age at menarche was significantly lower in healthy individuals (13.13 ± 1.01 vs. 12.15 ± 0.97, p < 0.001). By multivariate analysis, GFD adherence, transferrin saturation (sTrf), total IBC (TIBC) and vitamin D status were found to be positively correlated with Tanner stage (p < 0.05). After 1 year, 192 of the CD patients were re-evaluated. GFD compliance was better (TTG levels: 135.59 ± 73.88 vs. 71.53 ± 69.40, p < 0.001) and it was correlated with Tanner stage (r = 0.49, p < 0.01), sTrf (r = 0.66, p < 0.01) and IBC (r = 0.23, p < 0.05). Conclusions Our data show that adequate weight gain, adherence to GFD, sufficient iron and vitamin D status are essential factors for salubrious puberty in CD patients.