Product optimization

/Product optimization

Research – Product Optimization

Based on our own clinical studies, together with a review of new literature, we have optimized the nutritional composition of WLS Forte, WLS Optimum and WLS Maximum. The dosages of vitamins and minerals in your patients’ trusted supplements have been enhanced, further tailoring them to the nutritional needs after each specific type of bariatric procedure. On this page, you can find all studies which have lead to the optimized compositions.

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Comparing deficiency prevalences


Deficiencies in micronutrients after bariatric operations are frequent. Theoretically, prevalence depends on the kind of surgery and which parts of the gastro-intestinal system are bypassed. In a non-randomized prospective trial, the deficiency prevalence after Roux-en-Y Gastric Bypass (RYGB, 86 patients) was compared with Sleeve Gastrectomy (SG, 50 patients) for up to 3 years after surgery. Postoperatively, all patients were prescribed daily multivitamin supplements.

Comparing deficiency prevalences2020-03-24T13:47:48+00:00

Iodine absorption after bariatric surgery


Bariatric surgery is often accompanied by malnutrition of several vitamins, minerals and trace elements. Iodine is a trace element, needed for synthesis of thyroid hormones. Since iodine is absorbed from the intestinal tract, patients after bariatric surgery are hypothetically at risk of malabsorption. This study aimed to estimate the daily absorption of iodine for patients after bariatric surgery in which several parts of intestine were bypassed.

Iodine absorption after bariatric surgery2020-01-06T15:12:27+00:00

Deficiencies after Sleeve Gastrectomy


For a long time, professionals have stated that a Sleeve Gastrectomy (SG) procedure has minimal impact on the nutrient status. However, studies have found that deficiencies are as common in SG patients as in Roux-en-Y Gastric Bypass patients. To prevent vitamin and mineral deficiencies after an SG, lifelong supplementation is recommended. In 2009, FitForMe developed a specialized multivitamin supplement specifically for SG patients, based on scientific research: The first version of WLS Optimum.

Deficiencies after Sleeve Gastrectomy2020-01-06T12:30:47+00:00

Sleeve Gastrectomy patients benefit from specialized multivitamins


To prevent vitamin and mineral deficiencies after a Sleeve Gastrectomy (SG), lifelong supplementation is recommended. However, standard multivitamin supplements (sMVS) are proven to be ineffective in the prevention of nutritional deficiencies. Therefore, FitForMe developed WLS Optimum, specifically for SG patients. In a retrospective analysis including 970 SG patients, the effectiveness of WLS Optimum on deficiencies was compared to a standard multivitamin for a period of five years.

Sleeve Gastrectomy patients benefit from specialized multivitamins2020-01-06T12:31:15+00:00

Long-term effect of WLS Forte for RYGB patients


After a Roux-en-Y Gastric Bypass (RYGB), patients are advised to take lifelong food supplements to reduce the risk of developing deficiencies. To adjust to the specific needs of RYGB patients, a specialized bariatric multivitamin supplement (WLS Forte) was developed in 2010. A previous study has shown the efficacy of WLS Forte on the nutritional status of RYGB patients in the first year after surgery: iron deficiencies were lowered by 88% when using WLS Forte. The present study builds on the initial evidence by evaluating the longer-term effects and safety of WLS Forte, 3 years after RYGB.

Long-term effect of WLS Forte for RYGB patients2020-01-06T12:33:15+00:00

Efficacy of WLS Forte after a Roux-en-Y Gastric Bypass


Since iron, vitamin B12 and folic acid deficiencies often occur after a Roux-en-Y Gastric Bypass (RYGB), patients are advised to take daily food supplements. Based on literature and pilot studies, FitForMe developed WLS Forte in 2010, a bariatric multivitamin supplement customized to the needs of RYGB patients. In a triple-blind randomized controlled trial, the effectiveness and safety of WLS Forte was evaluated over 12 months.

Efficacy of WLS Forte after a Roux-en-Y Gastric Bypass2020-01-06T12:34:42+00:00

Supplementation after a Biliopancreatic Diversion


Within 3 years after a Biliopancreatic Diversion (BPD) or BPD with Duodenal Switch (BPD/DS), up to 90% of all patients develop nutritional deficiencies. With this study, Homan and colleagues increase the knowledge needed to develop supplementation recommendations and doses to maintain nutritional health after BDP or BDP/DS.

Supplementation after a Biliopancreatic Diversion2020-01-06T12:35:38+00:00