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Aged garlic extract (AGE, Kyolic)

Supplement of Allium sativum extract aged for 20 months and standardised to S-allylcysteine (SAC); sold under the Kyolic brand; not registered as a medicine by AEMPS

ATC code: C04AB-AGED-GARLIC(Aged garlic extract (Kyolic))

Brand names: Kyolic Aged Garlic Extract (Wakunaga), Garlique, Nature's Way Garlicin

Updated · Methodology

Marketing claims without evidence base

The drug is promoted for these uses outside international guidelines. Each entry below is analyzed against AEMPS, FDA, EMA, Cochrane and major RCTs.

C

Mild arterial hypertension

Not recommended

Aged garlic extract is one of the most studied herbal supplements in mild hypertension. The Ried 2013 meta-analysis (n ≈ 970) and the 2020 update reported reductions of about 7 mmHg systolic and 5 mmHg diastolic BP in hypertensive patients on SAC 600–1500 mg/day for 8–12 weeks. The effect is non-significant in normotensive subjects. 2024, SEH-LELHA 2022 and SEC do not include garlic in hypertension treatment algorithms. 2009 rejected all garlic health claims linked to cardiovascular disease – the evidence base did not meet the regulatory threshold. Replacing ACE inhibitors, ARBs or calcium channel blockers with aged garlic is not justified. If antihypertensive medication has been prescribed, do not stop it in favour of an iHerb supplement.

Sources

  1. BMC Cardiovasc Disord: Effect of garlic on blood pressure: an updated meta-analysis (2013)
  2. Exp Ther Med: Garlic lowers blood pressure in hypertensive subjects, improves arterial stiffness and gut microbiota: an updated meta-analysis (2020)
  3. EFSA: Scientific opinion on the substantiation of health claims related to Allium sativum (2009)
  4. ESC/ESH: ESC Guidelines for the management of elevated blood pressure and hypertension (2024)

ICD-10: I10 · ICD-11: BA00.Z

D

“Cardiovascular wellness” (marketing claim)

Not recommended

Aged garlic extract (Kyolic) is garlic aged for up to a year and a half. It is sold as a supplement for heart and blood vessel health, with claims of lower blood pressure and cholesterol. There is no convincing evidence for this use: good-quality data do not show a meaningful effect on cardiovascular outcomes. For high blood pressure and high cholesterol, what actually works is diet, physical activity, and medicines with proven benefit chosen by a doctor. The extract itself is safe in this role, but do not take it instead of prescribed treatment, since this can mean missing therapy that genuinely helps.

Sources

  1. EFSA: Scientific opinion on the substantiation of health claims related to Allium sativum (2009)
  2. ESC: ESC Guidelines on cardiovascular disease prevention in clinical practice (2021)
D

Dyslipidemia

Not recommended

Aged garlic is sold as a «natural statin substitute» for cholesterol reduction. The Ried 2013 Nutrition Reviews meta-analysis showed a weak total cholesterol reduction of about 8 mg/dL in hypercholesterolaemic subjects, without a meaningful effect on or . The effect is clinically marginal: statins reduce LDL by 30–50% in primary and secondary prevention and demonstrably reduce cardiovascular events. EPAR and AEMPS have not registered aged garlic for dyslipidaemia. When a statin is offered based on risk, swapping it for garlic is neither equivalent nor justified. Discuss standard lipid-lowering therapy with a general practitioner or cardiologist.

Sources

  1. Nutr Rev: Effect of garlic on serum lipids: an updated meta-analysis (2013)
  2. EFSA: Scientific opinion on the substantiation of health claims related to Allium sativum (2009)
  3. ESC: ESC Guidelines on cardiovascular disease prevention in clinical practice (2021)

ICD-10: E78 · ICD-11: 5C80

How to read tiers A–F
  • AStrong evidence – first or second line in international guidelines
  • BRecommended in selected cases
  • CStudy data contradict each other
  • DBenefit not proven, no documented harm
  • FDocumented harm, or risk without benefit

Mechanism of action

Aged garlic extract is obtained by prolonged aqueous–ethanolic maceration of crushed garlic – the process reduces the irritant allicin and enriches stable water-soluble sulfur compounds (S-allylcysteine, S-methylcysteine, allixin). Unlike fresh garlic and allicin, SAC is well absorbed and detectable in plasma. Putative mechanisms include platelet aggregation inhibition, mild NO-dependent vasodilation and antioxidant activity. Clinically the extract produces a modest BP reduction and a weak effect on the lipid profile; cardiovascular outcome benefit is unproven.

Safety

Contraindications

  • Active bleeding and coagulation disorders
  • Combination with anticoagulants (warfarin, rivaroxaban, apixaban, dabigatran, enoxaparin)
  • Combination with high-dose antiplatelet agents (aspirin, clopidogrel, ticagrelor)
  • Stop 2 weeks before elective surgery
  • Hypersensitivity to garlic

Serious adverse effects

  • Bleeding in patients on anticoagulants or antiplatelet agents
  • Perioperative bleeding when not stopped 2 weeks before the procedure
  • Reduced efficacy of saquinavir and other HIV protease inhibitors

Common adverse effects

  • Garlic breath and skin odour
  • Heartburn, nausea, epigastric discomfort
  • Flatulence, diarrhoea
  • Allergic skin reactions

Pregnancy: can you take Aged garlic extract (AGE, Kyolic)?

Safe in usual dietary amounts. AESAN does not recommend high-dose supplements in gestation due to bleeding risk and possible uterine stimulation.

Breastfeeding: can you take Aged garlic extract (AGE, Kyolic)?

Compatible in usual dietary amounts. High-dose supplements can alter milk odour and taste and provoke infant colic; AESAN does not recommend them during lactation.

Calculate RID

Reference information, not a clinical decision. Discuss feeding pauses or changes with your physician or an IBCLC.

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Frequently asked

What is Aged garlic extract (AGE, Kyolic) used for?

Aged garlic extract (AGE, Kyolic) is evaluated for the following indications with varying evidence strength: Mild arterial hypertension (evidence tier C), Dyslipidemia (evidence tier D), “Cardiovascular wellness” (marketing claim) (evidence tier D). See the full indication matrix with dosing and citations above on this page.

What are the side effects of Aged garlic extract (AGE, Kyolic)?

Common side effects of Aged garlic extract (AGE, Kyolic) (≥ 1 in 100): Garlic breath and skin odour, Heartburn, nausea, epigastric discomfort, Flatulence, diarrhoea, Allergic skin reactions. See the Safety section for uncommon and serious reactions.

Is Aged garlic extract (AGE, Kyolic) safe during pregnancy?

Safe in usual dietary amounts. AESAN does not recommend high-dose supplements in gestation due to bleeding risk and possible uterine stimulation.

Is Aged garlic extract (AGE, Kyolic) compatible with breastfeeding?

Compatible in usual dietary amounts. High-dose supplements can alter milk odour and taste and provoke infant colic; AESAN does not recommend them during lactation.

Who should not take Aged garlic extract (AGE, Kyolic)?

Aged garlic extract (AGE, Kyolic) is contraindicated in: Active bleeding and coagulation disorders; Combination with anticoagulants (warfarin, rivaroxaban, apixaban, dabigatran, enoxaparin); Combination with high-dose antiplatelet agents (aspirin, clopidogrel, ticagrelor); Stop 2 weeks before elective surgery; Hypersensitivity to garlic. Full list in the Safety section.

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