Heart and circulation
Most research on aged garlic focuses on heart health. Reviews of clinical trials, including Ried's 2016 review in the Journal of Nutrition, found garlic supplements produced modest reductions in blood pressure in people with high blood pressure. Effects in people with normal blood pressure were small.
Cholesterol
Some studies suggest small improvements in cholesterol, but results are mixed and effects are generally modest.
Immunity and colds
A few small studies have looked at aged garlic and colds, but the evidence is limited and not strong enough to draw firm conclusions.
Important limits
- Many studies were small and short
- Results vary between people
- Ingredient research doesn't prove any particular product works
- Supplements support, but don't replace, a healthy lifestyle and medical care
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Blood pressure: the best-studied benefit
Australian researchers ran a dose-response trial and later pooled several studies. On average, people with high blood pressure saw modest reductions after 12 weeks or more. People with normal blood pressure saw little change.
Read next: Aged garlic & blood pressure
Cholesterol
A meta-analysis found garlic may lower total and LDL cholesterol slightly in people with raised levels, especially when taken for more than two months. The effect is small compared with prescribed cholesterol medicine.
Arteries and circulation
Some small studies suggest aged garlic may help arteries stay more flexible and slow the build-up of plaque. These studies are early and small, so the results need confirming.
Colds and immunity
A few studies have looked at garlic and colds, but the evidence is limited. A Cochrane review found too few good-quality trials to draw firm conclusions.
Keeping expectations realistic
Garlic works best as one part of a heart-healthy routine: eating well, moving every day, limiting salt and alcohol, not smoking and taking any prescribed medicine. Talk to your GP about what matters most for you.
Read next: Reviews · Aged garlic dosage
Frequently asked questions
What is aged garlic good for?
It's mainly studied for heart and circulation health, where some research shows modest benefits, especially for blood pressure in people with hypertension.
How long does aged garlic take to work?
Clinical studies generally ran for 8 to 12 weeks or longer. Individual results vary.
What is aged garlic good for?
Research mainly supports a modest reduction in blood pressure in people with high blood pressure. Other benefits are less certain.
How long does aged garlic take to work?
Studies usually measured effects after 8–12 weeks or longer.
Is aged garlic good for your heart?
It's been studied mostly for heart and circulation health, with modest positive findings. It doesn't replace medical treatment.