S-allyl-L-cysteine
SAC · standardized to 1%
The marker compound for aged garlic and the one most of the human research is standardized against. Water-soluble, well absorbed, and studied for cardiovascular and antioxidant support.†
Aged 90 days
Fermented Black Garlic Extract
Whole garlic bulbs, aged 90 days until they turn black and sweet. Standardized to 1% S-allyl-L-cysteine. No odor, no burn, no aftertaste.
Cardiovascular support†Immune support†Digestive comfort†Antioxidant†Odorless
In stock · Ships in 1 business day · 60-day money-back guarantee
Third-party
tested
tested
Vegan
capsule
capsule
90-day
fermentation
fermentation
Black garlic isn't a different plant. It's ordinary Allium sativum held at controlled heat and humidity for 90 days, until the cloves darken, soften, and lose their bite entirely.
That slow transformation does two things at once. It converts the harsh, unstable allicin that causes garlic breath and stomach burn into stable, water-soluble compounds — chiefly S-allyl-L-cysteine, which is present only in traces in raw garlic and rises several-fold during aging. And the same browning reaction that turns the cloves black produces melanoidins and concentrates polyphenols.
Each serving delivers 1,000 mg of extract standardized to 1% SAC, in a plain vegetable capsule. Nothing else.
People who already know garlic is good for them and can't stomach it — literally. If raw garlic gives you reflux, if garlic tablets repeat on you all afternoon, or if you've been quietly avoiding a supplement your cardiologist mentioned, this is the version that goes down without incident.
It's a daily maintenance supplement, not a fix. Take it the way you take a multivitamin.
- Supports cardiovascular wellness and healthy circulation†
- Helps maintain blood pressure already in the normal range†
- Supports healthy cholesterol levels already within normal range†
- Provides antioxidant support against everyday oxidative stress†
- Supports the immune system's normal defenses†
- Gentler on the stomach than raw garlic or garlic oil
- No garlic odor, breath, or repeat
- Vegan · non-GMO · no gluten, dairy, soy, sugar, or fillers
Two capsules once daily with water, ideally alongside food. One pack is 60 capsules — a 30-day supply.
Garlic supplements work on maintenance, not on impact. Most of the clinical work on aged garlic runs 8–12 weeks, so give it a full three months before you judge it. Consistency matters far more than timing.
Talk to your doctor before starting if you take blood thinners or blood-pressure medication, are scheduled for surgery, or are pregnant or nursing.
Orders ship from our US facility within one business day. Standard delivery is 2–5 business days; free over $59.
If it isn't for you, email us within 60 days for a full refund — opened packs included. No forms, no return shipping.
The process
Ninety days in the dark
Nothing is added. Whole bulbs sit at controlled heat and humidity while their own enzymes rearrange the chemistry — sugars caramelize, allicin breaks down, and S-allyl-L-cysteine accumulates. Rush it and you get brown garlic. Skip it and you get heartburn.
Day 0Raw, white, pungent
Day 30Amber. Sugars begin to caramelize
Day 60Mahogany. Bite falls away
Day 90Black, soft, sweet. Sealed
S-allyl-L-cysteinerises
Virtually absent in fresh garlic. Aging converts γ-glutamyl-S-allyl-cysteine into SAC, reaching several times the raw concentration.
Pungency & GI burnfalls
The unstable, odorous sulfur compounds behind garlic breath and reflux are converted into stable, water-soluble ones.
| Property | Raw garlic | Fermented 90 days |
|---|---|---|
| Signature compound | Allicin — unstable, degrades quickly | S-allyl-L-cysteine — stable, water-soluble |
| SAC content | Trace amounts | Several times higher |
| Antioxidant capacity | Baseline | Markedly increased |
| Texture & taste | Firm, sharp, sulfurous | Soft, sweet, faintly balsamic |
| Odor on the breath | Pronounced, hours long | None |
| Tolerance on empty stomach | Often burns | Generally well tolerated |
What's inside
Four compounds, four jobs
Fermentation doesn't concentrate one thing. It produces a family of related compounds, each studied for something different.
Melanoidins
Formed only during aging
The brown-black pigments created as sugars and amino acids react over the 90 days. They carry much of the extract's antioxidant character and cannot be added in — only grown.†
Organosulfur compounds
Incl. S-1-propenyl-cysteine
The wider sulfur family that survives aging, including S-1-propenyl-cysteine — present only in traces in raw garlic and studied for immune-modulating activity.†
Polyphenols
Concentrated by fermentation
Plant antioxidants that climb sharply as the bulb ages. They're a large part of why fermented garlic outperforms raw garlic on antioxidant assays.†
0days of controlled fermentation
0extract per daily serving
0concentration from fresh bulb
0capsules — a full month
The label
Read the whole thing. It's short.
One active ingredient and one capsule material. Most garlic supplements list a proprietary blend and a fresh-bulb equivalence with no standardization behind it — which tells you nothing about what you're actually swallowing.
Ours states the extract weight, the extract ratio, and the standardized SAC content separately, because those are three different numbers and only one of them matters for dosing.
Third-party tested
Vegan & non-GMO
cGMP facility
No fillers
Gluten & soy free
Made in the USA
Supplement Facts
Serving size2 capsules
Servings per container30
Amount per serving% Daily Value
Fermented Black Garlic Extract
(Allium sativum, bulb) 6:1 extract1,000 mg †
(Allium sativum, bulb) 6:1 extract1,000 mg †
standardized to 1% S-allyl-L-cysteine10 mg †
equivalent to fresh garlic bulb6,000 mg †
† Daily Value not established.
Other ingredients: hypromellose (vegetable capsule).
Contains no: gluten, dairy, soy, egg, sugar, artificial colors, flavors, or preservatives.
Compare
Not all garlic capsules are the same product
Garlic powder, garlic oil, odorless garlic, and aged black garlic are four different things sold under one word. Here's where ours sits.
| Kuro Fermented Black Garlic | Typical garlic capsule | |
|---|---|---|
| Active marker | Standardized 1% SAC, stated in mg | "Allicin potential" or unstandardized |
| Processing | 90 days controlled heat & humidity | Dried and milled, or briefly heated |
| Odor & repeat | None — compounds already converted | Common, or masked with enteric coating |
| Stomach tolerance | Generally fine without food | Often causes reflux or burn |
| Batch testing | Every batch, COA on request | Rarely published |
| Ingredient count | One active, one capsule | Blends, binders, flow agents |
What to expect
An honest timeline
Aged garlic is a slow supplement. The clinical work runs 8–12 weeks, and so should your expectations. Here's roughly how customers describe it.
Weeks 1–2
Mostly, nothing dramatic
- You confirm the obvious thing: no garlic breath, no repeat, no burn
- The habit sticks, because there's no reason to skip it
- Some people notice easier digestion after meals
Weeks 3–5
The quiet phase
- Steadier afternoon energy is the most commonly reported change
- Less bloating and more regular digestion for some†
- Nothing you'd post about — which is normal for this category
Weeks 6–12
Where the research sits
- Most controlled trials on aged garlic report their findings at this point
- A sensible window to recheck anything you track with your doctor
- Antioxidant and cardiovascular support are cumulative, not immediate†
Month 4 and on
Maintenance
- It becomes background — two capsules, no thought required
- Benefits depend on continued use, like any dietary supplement
- Most people move to the 6-pack bundle here, for the price
4.8
★★★★★
2,140 verified reviews · 91% would buy again5 ★86%
4 ★10%
3 ★2%
2 ★1%
1 ★1%
★★★★★
Finally one that doesn't repeat on me
I've taken garlic capsules on and off for a decade and always gave up because of the burps. Three months on this one and there's genuinely nothing — my wife would tell me. Whether it's doing more than that I can't say, but I'm actually taking it every day now, which is more than I managed before.
DRDavid R., 58Verified buyer · 3 packs
★★★★★
My doctor suggested aged garlic, this is what I picked
She mentioned it at my last checkup and I went looking for something with an actual SAC number on the label rather than a vague milligram count. This was one of the few. Easy to swallow, no stomach issues taking it before breakfast. I'll know more at my next appointment.
MCMarta C., 61Verified buyer · 6 packs
★★★★☆
Slow, but I expected that
Weeks one and two I felt nothing and nearly wrote it off. Somewhere around week five I noticed I wasn't hitting the 3pm wall as hard. Could be coincidence. Docking a star because it isn't cheap, though the three-pack price is fair.
JTJen T., 44Verified buyer · 3 packs
Reviews reflect individual experience and are not typical or guaranteed results. Replace with verified reviews from your review app before publishing.
The guarantee
Take the whole pack. Then decide.
A 30-day supply isn't long enough to judge a supplement like this, so we give you sixty. Finish it. If you're not convinced, email us and we'll refund the order — opened packs included, no return shipping, no forms to fill in.
Questions
Before you buy
No. Standard garlic capsules are usually dried, milled garlic sold on "allicin potential" — allicin being an unstable compound that degrades quickly and causes most of the odor and stomach irritation. Black garlic is whole garlic aged for months, which converts that chemistry into stable compounds like S-allyl-L-cysteine. Same plant, different product.
It shouldn't. The volatile sulfur compounds responsible for garlic breath are largely converted during the 90-day aging, which is the main practical reason people switch to aged garlic in the first place.
Be patient. Most human research on aged garlic extract runs 8 to 12 weeks, and the effects it measures are gradual ones — the kind you notice in a lab result rather than in an afternoon. Customers who report a subjective change usually describe it somewhere around weeks four to six. If you want a fair trial, plan on three months.
Ask your doctor or pharmacist first — that's not a formality here. Garlic preparations can interact with blood thinners such as warfarin, some blood-pressure medications, and certain HIV medications, and are usually stopped before surgery. Bring the label to your appointment; the SAC content is printed on it.
We don't recommend it without your doctor's sign-off. Garlic is fine as food during pregnancy, but concentrated extracts haven't been studied enough in pregnancy or breastfeeding for us to make any claim about them.
Because they measure different things, and plenty of brands blur them deliberately. You get 1,000 mg of actual extract per serving. That extract is concentrated 6:1 from fresh bulbs, so it's derived from the equivalent of 6,000 mg of fresh garlic. The number that governs the dose is the standardized one: 10 mg of S-allyl-L-cysteine.
Email us within 60 days and we'll refund the full order, opened packs included. You don't need to ship anything back.
Buy Three · 3 packs$99.00 · free shipping