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Garlic (Allium sativum L.)


Garlic/Nutrient depletion:
  • GlucoseGlucose: The available evidence suggests that garlic does not significantly lower blood glucose levels in humans. Although animal study has reported that garlic may decrease glucose concentrations and increase insulin secretion (107; 108), multiple human trials have failed to demonstrate significant effects of oral garlic preparations on measures of glycemic control in diabetic or nondiabetic patients (113; 171; 105; 122; 123; 124; 246; 128; 130; 245), with the exception of one poor-quality study that noted a small significant reduction in mean blood glucose levels in patients treated with 800mg of daily dehydrated garlic (Kwai®), from 89mg/dL to 79mg/dL over four weeks (127).
  • LipidsLipids: Multiple trials have demonstrated modest lipid-lowering properties of oral garlic supplementation, including decreases in total cholesterol and low-density lipoprotein (2; 3; 5; 6; 4).

Copyright © 2011 Natural Standard (

The information in this monograph is intended for informational purposes only, and is meant to help users better understand health concerns. Information is based on review of scientific research data, historical practice patterns, and clinical experience. This information should not be interpreted as specific medical advice. Users should consult with a qualified healthcare provider for specific questions regarding therapies, diagnosis and/or health conditions, prior to making therapeutic decisions.

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