New study tests if tailored vitamins beat One-A-Day pills after gastric bypass

NCT ID NCT07021170

First seen Nov 01, 2025 · Last updated May 02, 2026 · Updated 24 times

Summary

This study looks at whether special supplements made for people who had weight-loss surgery work better than standard multivitamins at preventing vitamin and mineral deficiencies. About 624 adults who are scheduled for sleeve gastrectomy, gastric bypass, or one-anastomosis bypass will take either the specialized supplement or a standard multivitamin for 12 months. Researchers will check blood levels of key nutrients like iron, vitamin B12, and vitamin D, and also track how well participants tolerate and stick with the supplements.

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Contacts and locations

Study contacts

  • Contact

    Phone: •••-•••-•••• Email: •••••@•••••

Locations

  • The surgical department of Medical Research Institute Hospital, Alexandria University

    RECRUITING

    Alexandria, Alexandria Governorate, 21531, Egypt

    Contact Phone: •••-•••-•••• Email: •••••@•••••

Conditions

Explore the condition pages connected to this study.