Prebio Plus

What it is

A multi-blend prebiotic fiber + resistant-starch powder (drink mix), 11 g dietary fiber per 16.7 g scoop, organized into three labeled blends:

• Microbiome Foundation Blend (5.3 g): Resistant Potato Starch (Solnul™), Baobab Fruit Powder (FIBRSS® Organic), Golden Kiwi Fruit Powder (Livaux®)
• Glucobalance Blend (6.9 g): Resistant Tapioca Dextrin, Oat Beta Glucan, Glucomannan (konjac root)
• Prebiotic Biodiversity Blend (3.7 g): Acacia Fiber, Partially Hydrolyzed Guar Gum (Sunfiber®), Chia Seed Powder, Flaxseed Flour, Arabinogalactan Heartwood (Larch Tree)

⚠️ CORRECTED 2026-06-09 from the actual product label (image HavenSupplements-30-Prebioplus-facts.png). The previous entry described it as just "PHGG + acacia + inulin." The real product is much broader and contains no inulin - do not describe it as inulin-based or reference an inulin FODMAP load.

What it does (mechanism)

A broad, slow-fermenting fiber matrix engineered for SCFA production and microbial diversity while keeping the gas/bloat that limits prebiotic tolerance low:

• PHGG (Sunfiber®) - slowly + uniformly fermented across the entire colon by Bifidobacterium, Roseburia/E. rectale, E. hallii → acetate, propionate, butyrate. Gas per gram markedly lower than inulin or FOS. Monash low-FODMAP certified. Documented prokinetic effect (rationale for use as a rifaximin adjunct in SIBO).
• Acacia (gum arabic) - even more slowly fermented; among the most tolerated fibers known (no AEs at 40 g/day in healthy adults). Bifidogenic + lactogenic. Adds a distal-colon fermentation tail.
• Resistant starches (potato starch, tapioca dextrin) + oat beta glucan - butyrogenic substrates feeding colonocytes; oat beta glucan also supports glucose and cholesterol handling (the "Glucobalance" angle).
• Glucomannan, chia, flax - viscous/gel-forming fibers that add satiety, slow gastric emptying, and smooth glycemic response.

Net: broad colonic coverage, more uniform pH drop, more total SCFA, less localized gas.

Used for

Low fiber intake, IBS/FODMAP sensitivity, bowel regularity, probiotic users wanting synergistic microbiome support, SIBO adjunct with rifaximin (Furnari 2010 - PHGG + rifaximin 85–87% eradication vs 62% rifaximin alone, n=77).

Pairs well with

• Prospore - synbiotic combo. Mechanism partly marketing (spores germinate in small bowel, fibers ferment in colon - different real estate), but downstream microbial ecosystem benefits from both. [Practitioner]
• KPV - gut healing + gut feeding
• BPC-157 + KPV + Prospore - full gut-rebuild stack. Sequencing debate - pragmatic consensus: symptomatic patients start peptides + Prospore alone for 2–4 wk (calm + reseed); introduce Prebio Plus by titration once acute symptoms stabilize. Asymptomatic optimization: simultaneous is reasonable.

Dosing

Haven recommended (label protocol)

• Take per Haven label, with largest meal or mixed into a meal/smoothie
• Hydration ≥500 mL water per dose - soluble fiber without water can paradoxically constipate
• Onset: 1–3 weeks for full effect

Practitioner-directed - titration is mandatory [Practitioner]

1. Start at ¼ scoop / ~2 g/day × 3–5 days
2. Increase by 2 g every 3–5 days to target dose (usually 5–10 g/day)
3. Stop escalating at the dose where symptoms remain comfortable
4. AM for IBS-C (gastrocolic reflex, propagating contractions); PM for IBS-D (slower overnight fermentation, firmer morning stool); single PM dose for SIBO patients to avoid stacking gas during waking hours

• Relative to Prospore: co-administer with food OR separate (probiotic AM empty stomach / light meal; prebiotic later meal). Both acceptable; co-administration is the synbiotic norm.

Indication-specific clinical-trial doses (for reference)

Cautions / contraindications

• Active untreated SIBO - any prebiotic, including PHGG, can transiently worsen symptoms without antimicrobial coverage or motility support. The Furnari protocol pairs PHGG with rifaximin; using PHGG alone in untreated SIBO is a known cause of flares. Test (lactulose/glucose breath test) before high-dose in suspected SIBO.
• FODMAP-sensitive patients - inulin is the limiting component. Most tolerate; ~5–10% of IBS-D may react. Above-label serving size proportionally increases FODMAP load.
• Titration non-negotiable - jumping to full dose day 1 is the most common cause of treatment failure
• Drug interactions - soluble fiber slows absorption of co-ingested meds (thyroid hormone, lithium, certain antibiotics). Separate by ≥2 hours.
• Fiber bezoar risk - extremely rare; avoid in severe gastroparesis, anatomical strictures, prior bariatric surgery with reduced motility, chronic opioid use
• Pediatrics - Romano 2013 supports use in children >4 yr; ~0.1 g/kg PHGG-equivalent
• Pregnancy - GRAS, no harm signal; reasonable for constipation with clinician oversight

Key studies & references

• Kapoor M et al. 2017 - PHGG meta-analysis: 5–7 g/day produces laxative-magnitude improvements comparable to lactulose - J Func Foods - DOI 10.1016/j.jff.2017.04.011
• Yasukawa Z et al. 2019 - PHGG 5 g/day × 12 wk in healthy adults, improved stool form + ↑Bifidobacterium + ↑butyrate - Nutrients 11:2170 - PMID 31510020
• Niv E et al. 2016 - n=121 IBS Rome III, PHGG 6 g/day × 12 wk, significant improvement in bloating/gas - Nutr Metab 13:10 - PMID 26855671
• Furnari M et al. 2010 - n=77 SIBO, rifaximin + PHGG 85–87% eradication vs 62% rifaximin alone - Aliment Pharmacol Ther 32:1000 - DOI 10.1111/j.1365-2036.2010.04436.x
• Calame W et al. 2008 - n=54 acacia dose-response, 10 g/day minimum bifidogenic, tolerated to 30 g/day - Br J Nutr 100:1269 - PMID 18466655
• Min YW et al. 2024 - n=180 IBS-C, acacia 10 g/day significantly increased stool frequency - Eur J Nutr 63:1983
• Ohashi Y et al. 2015 - PHGG increases Bifidobacterium + butyrate-producers - Beneficial Microbes 6:451 - PMID 25519526
• Romano C et al. 2013 - pediatric functional abdominal pain, PHGG 5 g × 4 wk - PMC3547554

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