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Garlic Extract (Aged / Allicin) Side Effects & Safety

Evidence:Strong
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This content is for informational purposes only and does not constitute medical advice. Statements about dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. Individual results may vary — consult your healthcare provider before starting any supplement. Full disclaimer

Safety Profile

Overall safety rating: Generally Safe

Potential Side Effects

  • Garlic breath and body odor (less with AGE)
  • GI discomfort (heartburn, nausea, bloating)
  • Increased bleeding risk at high doses
  • Allergic reactions (rare — contact dermatitis, asthma)

Drug & Supplement Interactions

  • Anticoagulants/antiplatelets (warfarin, aspirin) — may increase bleeding risk
  • HIV protease inhibitors (saquinavir) — garlic may reduce drug levels by inducing CYP3A4
  • Isoniazid — garlic may reduce absorption
  • Hypotensive medications — additive blood pressure-lowering effects

Maximum Dose

Do not exceed: 2400mg AGE/day (well-tolerated in clinical trials)

Full Garlic Extract (Aged / Allicin) Guide

References

  1. Meta-analysisRied K (2016). Garlic Lowers Blood Pressure in Hypertensive Individuals, Regulates Serum Cholesterol, and Stimulates Immunity: An Updated Meta-analysis and Review. Journal of Nutrition. DOI PubMed
  2. RCTMatsumoto S, Nakanishi R, Li D, Alani A, Rezaeian P, Budoff MJ (2016). Aged Garlic Extract Reduces Low Attenuation Plaque in Coronary Arteries of Patients with Metabolic Syndrome. Journal of Nutrition. DOI PubMed
  3. RCTSobenin IA, Andrianova IV, Demidova ON, Gorchakova T, Orekhov AN (2008). Lipid-lowering effects of time-released garlic powder tablets in double-blinded placebo-controlled randomized study. Journal of Atherosclerosis and Thrombosis. DOI PubMed