Bariatric (Weight Loss) Surgery

Postoperative vitamin and element replacement

After a Gastric Bypass you are more likely to develop vitamin and elemental deficiencies. The duodenum and first part of the small bowel is on longer in contact with your ingested food. It is here that some vitamins and elements are absorbed into the blood stream. This is generally less following a Sleeve Gastrectomy, as there is no mal-absorptive component (the gut continuity is 'normal').

Common deficiencies are calcium (if low can thin bones), iron (if low results in anaemia) and vitamin B12 (if low can result in abnormal red blood cells). To account for this you will be required to take regular daily chewable multi-vitamin tablets and Vitamin D supplementation. Vitamin B12 will require a 6-12monthly injection at your GP. This will generally be adequate however we recommend annual blood test. A bone density scan is recommended at 2 and 5 years to assess any premature thinning of your bones.

Common examples of chewable multivitamin tablets are;

  • Centrum
  • Celebtrate

It is important that these multivitamins and injections are continued lifelong.

Post operative multivitamin

  • These are best started upon discharge. A chewable form is recommended for the initial 2 weeks.
  • Celebrate Bariatric chewable Multivitamin can be ordered through amsnutrition.co.nz
  • Centrium Advance 50+ or Centrium Woman's multi (x2 per day) once on pureed diet (2-3 weeks post procedure)
  • Calcium Carbonate is recommended 500mg daily
  • Do not take with meals
  • Ferrogradumet (iron) daily
  • Vitamin D orally 5000IU monthly
  • Vitamin B12 6 monthly injections
  • possible oral solutions available through amsnutrition.co.nz

Avoidance of constipation

  • Avoid dehydration
  • Laxsol medication charted on discharge
  • Psyllium husks (Metamucil)
  • Phole chewable tablets