• Video
  • Shop
  • Culture
  • Family
  • Wellness
  • Food
  • Living
  • Style
  • Travel
  • News
  • Book Club
  • Newsletter
  • Privacy Policy
  • Your US State Privacy Rights
  • Children's Online Privacy Policy
  • Interest-Based Ads
  • Terms of Use
  • Do Not Sell My Info
  • Contact Us
  • © 2026 ABC News
  • Wellness

Probiotics Supplement May Help After Gastric Bypass Surgery

ByRobert Preidt
July 18, 2009, 12:34 AM

July 18 -- FRIDAY, July 17 (HealthDay News) -- Taking a probiotics supplement after gastric bypass surgery helps patients lose weight faster and avoid vitamin B deficiency, a new study finds.

Probiotics are the "good" bacteria found in yogurt and in dietary supplements that aid digestion.

The Stanford University School of Medicine study included 44 patients who had Roux-en-Y gastric bypass surgery and were randomly assigned to either a probiotics group or a control group. Both groups received the same bariatric medical care and nutritional counseling and both were allowed to consume yogurt, a natural source of probiotics. Patients in the probiotics group also took one pill per day of a probiotics supplement.

After three months, the probiotics group had a 47.6 percent weight loss, compared with 38.5 percent in the control group. Patients in the probiotics group also had higher levels of vitamin B-12 three months after surgery than those in the control group -- 1,214 picograms per milliliter as opposed to 811 picograms per milliliter, a significant difference since B-12 deficiency is common after gastric bypass surgery.

The study appears in the July issue of the Journal of Gastrointestinal Surgery.

More information

The U.S. National Center for Complementary and Alternative Medicine has more about probiotics.

SOURCE: Stanford University, news release, July 13, 2009

Up Next in Wellness—

Antidepressant recalled due to presence of potentially cancer-causing impurity

June 16, 2026

WABC-TV anchor Bill Ritter shares new details of Alzheimer's diagnosis, future at work

June 15, 2026

3 women transform their wellness habits in 'GMA' '6 Week Shape Up'

June 15, 2026

Amid social media challenge, calls to poison centers for Benadryl among teens more than double this year than last

June 11, 2026

Shop GMA Favorites

ABC will receive a commission for purchases made through these links.

Sponsored Content by Taboola

The latest lifestyle and entertainment news and inspiration for how to live your best life - all from Good Morning America.
  • Contests
  • Terms of Use
  • Privacy Policy
  • Do Not Sell My Info
  • Children’s Online Privacy Policy
  • Advertise with us
  • Your US State Privacy Rights
  • Interest-Based Ads
  • About Nielsen Measurement
  • Press
  • Feedback
  • Shop FAQs
  • ABC News
  • ABC
  • All Videos
  • All Topics
  • Sitemap

© 2026 ABC News
  • Privacy Policy— 
  • Your US State Privacy Rights— 
  • Children's Online Privacy Policy— 
  • Interest-Based Ads— 
  • Terms of Use— 
  • Do Not Sell My Info— 
  • Contact Us— 

© 2026 ABC News