Obesity is one of the important chronic diseases with high growth in worldwide and bariatric surgery is currently considered the most effective treatment for weight reduction.

We aimed to analyze weight loss follow up and diabetes management in patients submitted to mini gastric bypass on use of vitamin and mineral supplementation, in the new set up center, in Mazandaran province for the first time.

Prospective analysis of 27 volunteers of both sexes, aged between 23 - 52 years, using laparoscopic mini gastric bypass in Sari’s Avicenna hospital, were included; personal information, anthropometric and laboratory data in the preoperative, 3, 6 and 9 months were collected. Statistical analysis was done with SPSS, 19 and using the Wilcoxon and Friedman test.

During follow up time after 276 days mean weight decreased from 118.7 ± 23.3 to 82.9 ± 15.7, P < 0.001 BMI also changed from 45.2 ± 1.8 to 32.2 ± 1.3, P < 0.001. There was decrease in percentage of excess weight loss at month of 3, 6 and 9 were 52.1, 32.6 and 16.4 respectively. Fasting blood sugar in diabetic subjects (n = 16) decreased from 170.9 ± 84.5 to 89.8 ± 11.3, P = 0.04.

In the newly set up center similar to the older one, surgical treatment in our follow up duration was effective for reducing weight, body mass index reduction and achievement of success in biochemical markers on diabetics.