Zinc Supplementation Guidelines for Bariatric Surgery Patients

Introduction to Zinc Supplementation

The British Obesity and Metabolic Surgery Society recommends supplementing Roux-en-Y gastric bypass (RYGB) and sleeve gastrectomy (SG) patients with 15 mg elemental zinc daily, which can be included within a complete multivitamin and mineral supplement 1, 2, 3
This dose may be contained within a complete multivitamin and mineral supplement rather than requiring a separate zinc preparation 1, 3
The optimal level remains uncertain, but this represents the consensus recommendation from British Obesity and Metabolic Surgery Society guidelines 1, 2

Provide 15 mg elemental zinc daily as the baseline recommendation for RYGB and SG patients 1, 2, 3
Start with at least 30 mg elemental zinc daily for biliopancreatic diversion with duodenal switch (BPD/DS) patients 1, 2, 3
This higher dose reflects the more severe malabsorption associated with these procedures 1, 4
Some evidence suggests up to 100 mg daily may be needed to prevent deficiency after BPD/DS, though starting conservatively at 30 mg is recommended 4

Always provide 2 mg copper daily when supplementing zinc to prevent zinc-induced copper deficiency 1, 2, 3, 5
Maintain a zinc-to-copper ratio of 8:1 to 15:1 when providing both supplements therapeutically 4, 6
Zinc and copper have an inverse relationship for absorption, making concurrent monitoring essential 4
If additional zinc supplements beyond the multivitamin are prescribed, monitor both zinc and copper levels regularly 4

Prescribe a complete multivitamin and mineral supplement containing at least 15 mg zinc and 2 mg copper for RYGB/SG patients 1, 5
For BPD/DS patients, ensure the supplement provides at least 30 mg zinc with 2 mg copper 1, 3
If using separate zinc supplements, take them at least 2 hours apart from iron or calcium supplements, as these minerals compete for absorption 5, 7

When monitoring, measure both zinc and copper simultaneously to detect imbalances 4

Avoid excessive zinc without copper co-supplementation, as this can precipitate severe copper deficiency requiring intravenous copper administration 6
Separate zinc from tetracycline or fluoroquinolone antibiotics by 2-4 hours to prevent chelation interactions that reduce antibiotic efficacy 6