Aged Garlic Extract — The Endothelial Protector

The primary bioactive in AGE is S-allylcysteine (SAC), a water-soluble organosulfur compound. SAC acts as a potent antioxidant by directly scavenging reactive oxygen species and upregulating endogenous antioxidant enzymes via the Nrf2 pathway. It also enhances endothelial nitric oxide (NO) bioavailability by stimulating endothelial nitric oxide synthase (eNOS), which promotes vasodilation and reduces arterial stiffness. Furthermore, AGE exerts anti-inflammatory effects by inhibiting the NF-κB pathway, thereby reducing the expression of pro-inflammatory cytokines and adhesion molecules implicated in atherosclerosis.

AGE is supported by robust human clinical data, particularly for cardiovascular health. Multiple randomized controlled trials, such as the AGE at Heart trial, have demonstrated that AGE significantly lowers systolic and diastolic blood pressure in hypertensive individuals. Additional human trials have shown that AGE supplementation improves endothelial function, reduces arterial stiffness, and slows the progression of coronary artery calcification compared to placebo.

The typical clinical dose ranges from 600 to 2,400 mg per day of aged garlic extract, usually divided into two doses. Extracts are often standardized to contain specific amounts of S-allylcysteine (e.g., 1.2 to 2.4 mg of SAC per dose). It is best taken with food to enhance absorption and minimize potential gastrointestinal discomfort.

Aged garlic extract is generally well tolerated and lacks the pungent odor and gastrointestinal irritants of raw garlic. However, due to its mild antiplatelet properties, it may increase the risk of bleeding when combined with anticoagulants (e.g., warfarin) or antiplatelet medications. It should typically be discontinued two weeks prior to scheduled surgeries.

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