LifeSource Vitamins Yeast Buster Liquid Extract — 1 fl oz, 460 mg per Serving — Promotes Healthy Gut Flora*
Rebalance your inner ecosystem with Yeast Buster — a targeted eight-herb liquid blend featuring Pau D’Arco, Usnea, Black Walnut, Spilanthes, Oregon Grape (berberine source), Gentian, Fennel, and a touch of Oregano oil. Designed to support healthy gut flora, digestive comfort, and everyday immune defense, each 30-drop serving delivers a concentrated 460 mg herb-weight equivalent.* Produced in FDA-registered, GMP-certified facilities and 3rd-party lab tested for purity, potency & label accuracy.*
Research-Driven & Verified Product.
Explore the clinical research, ingredient science, and global evidence supporting this product below.
Research Promise: At LifeSource Vitamins, our commitment is rooted in research and results. Every benefit below is supported by human clinical studies indexed in the National Institutes of Health (NIH) via PubMed, with full texts available in the National Library of Medicine (NLM) PubMed Central (PMC) when available. We also reference reviews from 39 leading health organizations and insights from 20 top global universities to ensure our guidance aligns with credible science.*
Clinically Studied Benefits (Human Evidence)
✓ Supports digestive “bitters” physiology* — Human studies show bitter tastants can influence gut hormones and motility relevant to digestive readiness. Deloose 2018, Neurogastroenterol Motil; Bitarafan 2019, PMC; Rezaie 2021 review, PMC
✓ Herbal support in SIBO context* — A clinical study reported an oregano/berberine-containing herbal protocol performed comparably to rifaximin for breath-test resolution. Chedid 2014, PMC
✓ Fennel for GI comfort* — Human trials show fennel seed oil can reduce colic symptoms and support GI comfort. Alexandrovich 2003, RCT; cited in Evans 2022 review, PMC
✓ Gentian (bitter) human data* — Human crossover work with gentian-derived bitters explored metabolic/appetite responses post-meal. Mennella 2016, crossover; Wölfle 2017 mechanistic, PMC
Additional Studies Showing Promising Benefits
✓ Oregano oil & gut ecology* — Oregano essential oil is widely studied for effects on intestinal barrier and microbiota (animal/human-adjacent models). Ma 2023, PMC; Luo 2024, PMC
✓ Berberine (Oregon grape) & microbiota* — Reviews summarize berberine’s modulation of gut microbes and GI outcomes. Zhang 2021 review; Yang 2023 review, PMC
✓ Black walnut phytochemicals* — Analyses identify antibacterial compounds and activity in walnut tissues (lab models). Ho 2018, PMC; Wenzel 2016
✓ Usnea (lichen) antimicrobial research* — Reviews document antimicrobial properties of usnic-acid–rich species (safety considerations noted). Sepahvand 2021 review; safety: Guo 2008, PMC
We monitor research from leading institutions — including Harvard, Johns Hopkins, Mayo Clinic, Cleveland Clinic, Cambridge, Oxford, Stanford, Yale, MIT, the University of Florida, Oregon State University – Linus Pauling Institute, Tufts, Boston University, Cornell, Columbia, and Ohio State — to ensure our guidance remains aligned with credible science.*
Brief Benefit Bullets
- Promotes healthy gut flora balance for digestive harmony*
- Enhances immune defense to support everyday wellness*
- Supports digestive comfort and smoother GI function*
- Provides natural antimicrobial activity in the gut*
- Helps maintain balanced Candida levels*
- Encourages natural detoxification and cleansing pathways*
- Soothes gut discomfort with time-honored organic herbs*
- Promotes intestinal immune balance and resilience*
- Delivers antioxidant protection from plant compounds*
Suggested Use
Add 1 mL (≈30 drops) to 2 oz water or juice, 1–3× daily, best between meals. Not for use during pregnancy or nursing. Not for long-term use; do not exceed recommended serving. If taking medications or have a medical condition, consult your physician.*
Product Specifications
Serving Size — 1 mL (30 drops)
• Servings Per Container — ~30
• Herb-Weight Equivalents per serving — 460 mg
• Herb Strength Ratio — 1:2.2
• Proprietary Blend — Usnea lichen, Pau D’Arco bark, Fresh Black Walnut hull, Fresh Spilanthes flower, Oregon Grape root, Gentian root, Fennel seed, Oregano oil
• Other ingredients — Deionized water, grain alcohol (45–55% by volume)
• Free From — Non-GMO, gluten-free, vegan; no dairy, soy, or artificial colors/flavors*
• Quality — Third-party tested for identity, potency & purity
LifeSource Vitamins — Proudly American — Since 1992
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Always consult your physician before taking any supplements.
Yeast Buster Liquid Extract — eight-herb formula to support gut flora, GI comfort, and immune defense. Non-GMO, vegan, 3rd-party tested. PubMed/PMC-linked research*
