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ingestible · for sibo (small intestinal bacterial overgrowth)

Elemental Diet (2-Week Liquid Formula Protocol)

Reviewed by the Nimbera editorial team · Last updated May 2026

A 2004 study by Pimentel et al. in Digestive Diseases and Sciences found a 2-week elemental diet normalized lactulose breath tests in 80% of SIBO patients, outperforming antibiotic therapy in that cohort.$300-$500 for a full 2-week course

How to use

Replace all meals with an elemental formula (pre-digested amino acids, simple sugars, and fats absorbed in the upper small intestine) for 14-21 days. Options include Physicians Elemental Diet (Integrative Therapeutics) or Vivonex. Consume 2,500-3,000 calories/day in divided doses. Work with a practitioner.

How it works

Elemental formulas are absorbed within the first few feet of the small intestine, leaving nothing for bacteria further down to ferment. This effectively starves the overgrowth without antibiotics or antimicrobials, causing bacterial die-off through nutrient deprivation.

Where to buy

Integrative Therapeutics Elemental Diet, Vivonex Plus (Nestle), or Peptamen - available through practitioner dispensaries, compounding pharmacies, or online.

Typical cost: $300-$500 for a full 2-week course

Safety notes

Difficult to adhere to - very unpalatable. Risk of refeeding syndrome if malnourished. Must be supervised by a practitioner. Recurrence is still possible without addressing underlying motility issues.

Drug & supplement interactions

  • Always tell your doctor or pharmacist about any supplements you take.
  • Interactions can occur with prescription medications, blood thinners, and immunosuppressants.
  • Herbal remedies can affect how the body absorbs or metabolises drugs.
  • Check drugs.com interactions checker before starting.

Clinical source

PubMed - Pimentel et al. 2004

This information is compiled from primary clinical literature and is for informational purposes only. It is not a substitute for professional medical advice. Read our full disclaimer.