Comparisons
Garlic or Black Garlic?
Black garlic is not a separate species; it is made by keeping the same plant (Allium sativum) at controlled heat and humidity for weeks. The EMA assessment of garlic preparations does not cover black garlic, whose data come from small studies. The table is built from the sourced cards of both records.
| Aspect | GarlicAllium sativum | Black GarlicAllium sativum |
|---|---|---|
| Strongest evidence | B Limited clinical evidence | B Limited clinical evidence |
| Needs | Heart & Circulation, Immunity | Heart & Circulation |
| Form | Spice | Clay, Soap & Other |
| How to use | Adults take 300–750 mg of a powdered garlic preparation per dose. | Black garlic is eaten as food; one study used about 4 cloves (12 g) a day. There is no verified dose for extract supplements. |
| Pregnancy | Avoid | Caution |
| Breastfeeding | Avoid | Caution |
| Recommended minimum age | From age 12 | Not stated |
| Drug interactions | 1 serious interaction(s) | Interactions reported |
| Duration limit | No limit on duration | Not stated |
Which one, when?
Garlic
Garlic powder preparations are traditionally used to help prevent hardening of the arteries, and dry extract for colds; some supplements may slightly lower cholesterol and blood pressure.
Full card →Black Garlic
Eaten as a food. In a study of 67 people its extract slightly lowered diastolic blood pressure without meaningfully changing cholesterol; there is no confirmed supplement dose.
Full card →Good to know
- People on blood thinners or aspirin should talk to their doctor before taking supplements of either form, and tell their doctor before surgery.
- People allergic to garlic should also avoid black garlic.
- These warnings concern supplements; garlic in normal cooking amounts is outside their scope.
Sources
- European Union herbal monograph on Allium sativum L., bulbusEMA HMPC · 2017 · MonographSource accessed:
- Garlic: Usefulness and SafetyNIH NCCIH · 2025 · Official agency informationSource accessed:
- Effects of an Optimized Aged Garlic Extract on Cardiovascular Disease Risk Factors in Moderate Hypercholesterolemic Subjects: A Randomized, Crossover, Double-Blind, Sustained and Controlled StudyNutrients · 2022 · Randomized controlled trialSource accessed:
- Effect of Black Garlic Consumption on Endothelial Function and Lipid Profile: A Before-and-After Study in Hypercholesterolemic and Non-Hypercholesterolemic SubjectsNutrients · 2023 · Observational study / case seriesSource accessed: