You are here:

Do specialized bariatric multivitamins lower deficiencies after Sleeve Gastrectomy?

Nutritional deficiencies are common after a Sleeve Gastrectomy (SG), making lifelong supplementation an important recommendation. 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 deficiency prevention was compared to a sMVS for a period of five years.

Serum blood values of WLS Optimum versus standard food supplements

During the study, patients were free to purchase the supplement of their choice: either the specialized multivitamin WLS Optimum (291 patients) or sMVS (679 patients). Serum blood values of the most common deficiencies were determined preoperatively, at 6 months and 1, 2, 3 and 4 years after surgery.

WLS Optimum effectively prevents development of deficiencies

This study found that usage of WLS Optimum resulted in higher mean blood serum concentrations and less de novo deficiencies for vitamin B1, folic acid and vitamin B12. Overall, the number of patients having one or more deficiencies was significantly lower among WLS Optimum users, compared to sMVS users. On the contrary, hypervitaminosis for vitamin B6 was significantly more prominent with WLS Optimum versus sMVS, whereas lower Hb levels were observed. For a complete overview of significant differences in de novo deficiencies for both groups, see figure 1.

Product optimization is needed

This study showed that SG patients should not just only use lifelong sMVS, but could benefit even more from the specialized WLS Optimum. During the finalization of this study, after data collection, WLS Optimum was optimized, including a change in the dosage of iron and vitamin B6.

Figure 1: Percentages of de novo deficiencies for WLS Optimum and sMVS users.
Percentages of de novo deficiencies

For more information about the article, get in touch with us by clicking the button below.


Smelt, H.J.M., van Loon, S., Pouwels, S. et al. OBES SURG (2019).

Link to full text:

Stay up to date with the latest scientific news!

Sign up now for the FitForMe Research newsletter.