Background

Nutritional deficiencies are common following bariatric surgery, some studies have revealed that nutritional deficiencies are more frequent after Roux-en-Y gastric bypass (RYGB) than in patients operated of laparoscopic gastric sleeve (LGS); however others have found no difference and more studies are needed. ObjectivesReport the impact of the type of bariatric surgery on micronutrient and hemoglobin values 12 months after the procedure. SettingInstituto Mexicano del Seguro Social. Hospital de Especialidades del Centro Médico Nacional de Occidente (National Western Medical Center Specialty Hospital)

Methods

Is a retrospective cohort study, including 100 patients operated from 2016 to 2022. The anthropometric measurements, the results of pre-surgical laboratory tests and the follow-up at 1, 3, 6 and 12 months after surgery were taken from clinical records. Statistical analysis was performed with SPSS version 29.0.

Results

The impact of the type of bariatric procedure was equal in terms of micronutrient deficiencies between patients operated of RYGB and patients operated of LGS. Vitamin D3 levels were lower (p<0.05) in post-surgical of RYGB patients than of LGS (21.73 ng/ml (+-8.49) vs 26.36 ng/ml (+-10.74). Also, vitamin B12 levels at month 6, were lower with BGLYR (466.61 pg/ml (+-465.29) vs 654.52 pg/ml (+-796.93), p <0.05).

Conclusions

We found that the type of bariatric surgery does not impact on micronutrient deficiencies, but it does on vitamin D3 levels and vitamin B12 being lower with RYGB. It is probably necessary to continue evaluating deficiencies over a longer period of time to determine if these differences are significant.