Evidence-Based Supplement Reviews
Every immune claim cited.
We read the immune health studies so you don't have to.
Evidence-based supplement research you can trust. We analyze peer-reviewed clinical studies from PubMed and grade every supplement ingredient on a transparent A–D scale. No sponsored rankings, no manufacturer influence — just science.
Featured Ingredients
Andrographis
herbAndrographolide modulates NF-kB signaling, reduces pro-inflammatory cytokines, and enhances innate immune cell activity; exhibits both immune-stimulating and anti-inflammatory properties.
Beta-Glucan
other1,3/1,6-beta-D-glucans bind Dectin-1 and complement receptor 3 on macrophages and neutrophils, triggering a trained innate immune response; enhance phagocytosis, cytokine …
Curcumin
antioxidantInhibits NF-kB, MAPK, and NLRP3 inflammasome activation; activates Nrf2 antioxidant pathway; modulates macrophage, dendritic cell, T-cell, B-cell, and NK cell …
Echinacea
herbActivates macrophages, enhances phagocytosis, and stimulates NK cell activity through alkylamide and polysaccharide constituents; modulates cytokine production (TNF-alpha, IL-1, IL-6).
Elderberry
herbAnthocyanins and polyphenols activate immune cells and stimulate cytokine production; flavonoids bind to and may inhibit viral surface proteins, potentially …
Garlic
herbOrganosulfur compounds (allicin, diallyl disulfide) stimulate macrophage, lymphocyte, and NK cell activity; modulate cytokine secretion; exhibit broad-spectrum antimicrobial activity via …
Top Conditions
Acute Bronchitis
5% of adults annually
Allergic Rhinitis
10-30% of adults globally; 40% of children
Autoimmune Conditions
5-8% of the population; >80 recognized autoimmune diseases
Chronic Inflammation
Estimated 50-60% of adults have at least one inflammatory biomarker elevation
Gut Immune Health
Gut dysbiosis affects an estimated 25-45% of adults
Immune Aging (Immunosenescence)
Affects all individuals with aging; clinically significant after age 65
Recent Evidence Updates
10 studies
10 studies
10 studies
5 studies
15 studies
Popular Comparisons
Latest Research
Am J Clin Nutr · 1991
Omega-3 fatty acids in health and disease and in growth and development.
J Am Coll Nutr · 2002
Omega-3 fatty acids in inflammation and autoimmune diseases.
Arch Intern Med · 2009
Association between serum 25-hydroxyvitamin D level and upper respiratory tract infection in the Third National Health and Nutrition Examination Survey.
Crit Rev Immunol · 2012
M1 and M2 Macrophages: Oracles of Health and Disease.
Adv Nutr · 2013
Discovery of human zinc deficiency: its impact on human health and disease.
J Autoimmun · 2019
Systemic lupus erythematosus: Diagnosis and clinical management.
Guides & Resources
Exercise and Immune Function: The J-Curve, Recovery, and Nutritional Support
The relationship between exercise and immune function has been a subject of scientific inquiry since the observation in the 1980s and 1990s that elite endurance …
lifestyleSeasonal Immune Support: Evidence-Based Strategies for Fall, Winter, and Beyond
The human immune system does not operate in isolation from the environment, and seasonal changes in temperature, humidity, daylight hours, and pathogen circulation patterns all …
safetyImmune Supplement and Medication Interactions: What You Need to Know
Dietary supplements are often perceived as inherently safe because they are derived from natural sources, but many immune-support supplements contain pharmacologically active compounds that can …
Evidence Grading System
Every supplement claim on this site is graded on an A–D scale based on peer-reviewed clinical research from PubMed. Our algorithm evaluates study design (RCTs rank highest), consistency of results, sample sizes, and the overall body of evidence. No manufacturer sponsorship influences our grades.
Multiple randomized controlled trials (RCTs) or meta-analyses with consistent positive results and large sample sizes.
At least one RCT with mostly consistent results across studies. Evidence suggests benefit but more research may be needed.
Small studies or observational data with some positive signals. Promising but insufficient for strong recommendations.
In vitro studies, case reports, or pilot studies only. Early-stage research that requires clinical validation.
How It Works
No ads. No sponsored rankings. Just science.
Search PubMed
We search PubMed for every clinical study on supplement ingredients.
Extract Findings
We extract the key findings — sample sizes, study types, and results.
Grade A through F
We grade the evidence like a school report card — from A (strong) to F (negative).
Clear Answer
You get a clear answer in seconds — does this supplement actually work?
Cited Health Network
Explore evidence-based research across multiple health domains.
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SkinCitedEvidence-based skin health supplement reviews. Every claim about collagen, vitam
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.