Olive Leaf — 20% Oleuropein Standardized Extract — 60 Vegetarian Capsules — Immune & Cardiometabolic Support*
LifeSource Vitamins Olive Leaf provides a standardized olive leaf extract (20% oleuropein) to support healthy immune defenses, vascular wellness, and antioxidant protection. Produced in FDA-registered, GMP-certified facilities and 3rd-party tested for identity, purity & potency.*
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 based on human studies verified by the National Institutes of Health (NIH), a world-leading health authority, plus insights from 39 clinically respected organizations and 20 globally renowned health-focused universities.*
Clinically Studied Benefits
✓ Supports healthy blood pressure* — Olive leaf extract lowered systolic/diastolic measures in adults with stage-1 hypertension.
NIH/PubMed — Susalit E, 2011
✓ Improves vascular health & lipids* — Phenolic-rich OLE improved blood pressure and lipid profile.
NIH/PubMed — Lockyer S, 2016
✓ Promotes insulin sensitivity* — 12-week RCT improved insulin sensitivity and β-cell function in overweight men.
NIH/PubMed — de Bock M, 2013
✓ Shortens sick-day duration* — Season-long OLE reduced illness duration in athletes.
NIH/PubMed — Somerville V, 2019
✓ Cardiometabolic support* — Meta-analyses confirm OLE’s role in BP and lipid management.
NIH/PMC — Razmpoosh E, 2022
✓ Blood pressure direction of effect* — Favorable changes shown in pooled RCTs.
NIH/PMC — Ismail MA, 2021
✓ Antioxidant support* — OLE improved oxidative-stress markers in human studies.
NIH/PMC — Saibandith B, 2017
✓ Cardiometabolic overview* — Controlled trials show positive direction for BP/lipids.
NIH/PMC — Lockyer S, 2016
✓ Exercise-season wellness* — As above, reduced sick-day duration supports active adults.
NIH/PMC — Somerville V, 2019
✓ Glucose-insulin dynamics* — Reinforces direction of effect for insulin sensitivity.
NIH/PMC — de Bock M, 2013
Additional / Promising Evidence
✓ Lipid outcomes* — 8-week trial reported mixed lipid effects, showing importance of standardization.
NIH/PMC — Stevens Y, 2020
✓ Metabolic syndrome overview* — Reviews connect olive phenolics with cardiometabolic balance.
NIH/PMC — Saibandith B, 2017
✓ BP & lipids (meta-analysis)* — Confirms OLE’s supportive role in hypertension/dyslipidemia.
NIH/PMC — Razmpoosh E, 2022
✓ Blood pressure pooling* — Systematic review supports favorable BP outcomes.
NIH/PMC — Ismail MA, 2021
✓ Seasonal wellness in athletes* — Reduced sick-day duration supports immunity.
NIH/PMC — Somerville V, 2019
✓ BP & lipid direction* — Confirmed hypotensive/lipid-lowering activity.
NIH/PMC — Lockyer S, 2016
University-Led & Academic Studies
✓ Promotes insulin sensitivity* — 12-week RCT improved insulin sensitivity and β-cell function in overweight men (university-led at Liggins Institute, University of Auckland).
NIH/PubMed — de Bock M, 2013
✓ Shortens sick-day duration* — Season-long OLE reduced illness duration in athletes (university-led RCT with University of Auckland affiliation).
NIH/PubMed — Somerville V, 2019
Global Evidence & Reviews
✓ Global monographs & reviews* — WHO, NCCIH, EFSA/EMA, USP/NSF, ABC, and other public sources confirm olive leaf’s safety and use in cardiometabolic and immune wellness.*
We monitor research from leading institutions —
Harvard, Johns Hopkins, Mayo Clinic, Cleveland Clinic, Cambridge, Oxford, Stanford, Yale, Tufts, University of Florida, Oregon State University – Linus Pauling Institute, Columbia, Cornell, Ohio State — to align with credible science.*
Key Ingredients
- Olive Leaf Extract (Olea europaea) standardized to 20% Oleuropein
- Form: Vegetarian capsules
- Other Ingredients: As per label (vegan, non-GMO, gluten-free)
Brief Benefit Bullets
- Supports healthy immune defenses*
- Helps maintain healthy blood pressure already in the normal range*
- Promotes antioxidant protection for cellular health*
- Vegan, non-GMO; made in FDA-registered, GMP-certified facilities*
- Allergy note: contains no soy, dairy, or gluten*
- 3rd-party lab tested for identity, potency & purity
Suggested Use
See product label for full instructions, or as directed by your healthcare professional. Do not exceed recommended dose. If pregnant, nursing, taking medications, or have a medical condition, consult your physician.*
Product Specifications
• Serving Size — See Supplement Facts label
• Servings Per Container — See Supplement Facts label
• Form — Easy-to-swallow vegetarian capsules
• Free From — Non-GMO, gluten-free; no artificial colors, preservatives or synthetic chemicals*
• 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.
Olive Leaf — 20% Oleuropein Standardized Extract — supports immune defenses, vascular wellness, and antioxidant protection. 3rd-party tested quality. Clinically Studied Ingredients — NIH/PubMed!*
