What is Ajoene?

First,Name Explanation

Ajoene (Official chemical names: Ahonen, Allicin) is a natural organosulfur compound generated during the high-temperature and high-humidity fermentation process of garlic. It is considered one of the characteristic newly formed bioactive compounds in high-quality fermented black garlic.

Fresh whole garlic itself does not naturally contain Ajoene in significant amounts. Ajoene is produced through the transformation of garlic sulfur compounds during long-term aging and fermentation.

Basic Information:

⦁ Chemical Name: Ajoene

⦁ Molecular Formula: C₉H₁₄OS₃

⦁ CAS No.: 92284-99-6 / 92285-01-3

⦁ Isomers: E-Ajoene and Z-Ajoene

Ajoene exists mainly in two structural forms: E-type and Z-type isomers.

Second. Complete Formation Mechanism of Ajoene During Garlic Fermentation

➤  Step 1: Conversion of Alliin into Allicin (Enzymatic Reaction)

When garlic cells are damaged through crushing, cutting, or fermentation-related cell disruption, the enzyme alliinase stored in garlic vacuoles comes into contact with alliin in the cytoplasm.

Through enzymatic hydrolysis, alliin is converted into:

Alliin → Allicin

Allicin is the main compound responsible for the pungent aroma and spicy flavor of fresh garlic. However, it is highly unstable and easily decomposes.

➤  Step 2: Transformation of Allicin into Ajoene During Fermentation

Under long-term fermentation conditions with:

⦁ High temperature

⦁ High humidity

⦁ Extended aging time

three molecules of allicin undergo condensation, molecular rearrangement, and sulfur bond reorganization, eventually forming:

Ajoene

Oil-based systems and prolonged aging conditions are more favorable for Ajoene accumulation, while aqueous environments generally produce lower levels of Ajoene.

During black garlic fermentation, allicin is also transformed into other valuable sulfur compounds, including:

⦁ S-Allyl-Cysteine (SAC)

⦁ S-Allyl-Mercapto-Cysteine (SAMC)

At the same time, Maillard reactions occur, generating:

⦁ Polyphenols

⦁ Melanoidins

⦁ Flavor compounds

These reactions result in:

⦁ Dark black garlic color

⦁ Reduced pungent garlic flavor

⦁ Sweet and mellow taste

Soft and smooth texture

Third,Key Functional Values of Ajoene

Ajoene is considered one of the important bioactive compounds contributing to the enhanced value of fermented garlic products.

➤  Cardiovascular Health Support

Ajoene has been widely studied for its potential role in supporting cardiovascular health.

Research suggests that Ajoene may:

⦁ Support healthy blood circulation

⦁ Influence platelet aggregation activity

⦁ Help maintain normal vascular function

➤  Lipid Metabolism Support

Ajoene and other garlic-derived sulfur compounds have been studied for their potential role in:

⦁ Supporting healthy lipid metabolism

⦁ Maintaining cholesterol balance

⦁ Supporting normal triglyceride levels

➤  Broad-Spectrum Antimicrobial and Antifungal Activity

Ajoene demonstrates natural antimicrobial properties in scientific studies and has shown activity against certain microorganisms, including:

⦁ Candida species

⦁ Certain fungi

⦁ Staphylococcus aureus

➤  Antioxidant, Anti-Inflammatory and Cellular Protection Potential

Ajoene has been researched for its potential:

⦁ Antioxidant activity

⦁ Support of healthy inflammatory response

⦁ Neuroprotective effects

Some in-vitro studies have also explored its potential effect on cancer cell proliferation.

➤  Better Stability Compared with Allicin

Compared with allicin, which is highly unstable, Ajoene offers:

⦁ Better thermal stability

⦁ Improved storage stability

⦁ Greater suitability for functional food and nutritional applications

Fourth. How to Increase Ajoene Content During Black Garlic Fermentation

Professional fermentation control plays an important role in improving Ajoene formation.

➤  Temperature Control

Recommended fermentation temperature:

60–85℃

Controlled low-to-medium temperature fermentation is considered more favorable for the accumulation of Z-Ajoene, which is regarded as the more biologically active isomer.

➤  Humidity Control

Recommended humidity:

70–90%

A high-humidity and closed fermentation environment helps:

⦁ Maintain enzymatic activity

⦁ Promote continuous sulfur compound transformation

➤  Long-Term Aging Process

Recommended fermentation period:

45–90 days

A longer aging period promotes:

⦁ Higher bioactive compound accumulation

⦁ Improved flavor development

⦁ Softer texture

➤  Supporting Processing Methods

The following methods may help improve Ajoene formation:

⦁ Pre-treatment of garlic through controlled crushing

⦁ Proper fermentation preparation

⦁ Addition of a small amount of oil-based medium

These approaches can enhance the conversion efficiency of garlic sulfur compounds.

Shandong Rich Black Garlic — High Ajoene Premium Fermented Garlic Supplier

Shandong Rich Garlic Co., Ltd. uses Yunnan Purple-Skin Single Clove Garlic as the premium raw material for black garlic production.

Through Rich’s proprietary advanced fermentation technology, the natural transformation process of:

Allicin → Ajoene + S-Allyl-Cysteine (SAC)

is effectively promoted during fermentation.

Rich’s single clove black garlic features:

⦁ High-quality Yunnan purple-skin garlic raw materials

⦁ Long-term controlled fermentation technology

⦁ Rich natural nutrient compounds

⦁ Premium flavor and soft texture

⦁ Stable product quality

Shandong Rich Garlic Co., Ltd. is committed to becoming one of the world’s most trusted manufacturers and exporters of premium black garlic products.