Comparison of body mass reduction obtained with RYGB and SG bariatric procedures and with a reduction diet – procedures versus reduction diet

Małgorzata Szczuko, Natalia Komorniak, Agata Jaroszek



Introduction: Extreme obesity is becoming a more common health problem, and the growing popularity of bariatric procedures seems to be a good solution in the pursuit of reaching a proper body weight and to improve health.

The aim of this study was to determine whether bariatric procedures are more effective than a rational reduction diet in obtaining body weight reduction and an appropriate intake of nutrients.

Materials and methods: The analyses were performed among 40 female patients admitted for bariatric surgery using gastric bypass or sleeve gastrectomy. The average age of women was 42.96 (SD 10.45) years, average body weight was 131.56 kg (SD 14.18) with average height of 168.37 cm (SD 8.69). All statistical analyses were performed using Statistica 12.

Results: The loss of body weight on the reduction diet after 13 months ranged from 26–42 kg, depending on the level of physical activity. In the group of patients after bariatric surgery the average body weight reduction after 13 months was 31.87 kg. The reduction diet and the diet after surgery were prepared according to the Diet 5 software recommended by Institute of Food and Nutrition (Instytut Żywności i Żywienia) in Poland. The diet after the bariatric procedure contained 1237 kcal and comprised 26.9% protein, 34.6% fat and 38.5% carbohydrates. The diet for patients after the surgery provided insufficient levels of potassium, calcium, magnesium, iron, zinc, iodine, vitamins: E, B1, D, folic acid and dietary fibre.

Conclusions: Body mass reduction achieved by proper diet and increased physical activity can be equally effective in obesity treatment as bariatric procedures. It also poses lesser risk of complications and potential deficiencies in nutrients. It seems that in both cases the long-term support of a dietician and a psychologist is necessary in order to develop healthy eating habits.


body mass reduction; bariatric surgery; reduction diet; Roux-en-Y gastric bypass; sleeve gastrectomy

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