Berberine has become one of the most talked-about supplements of the last few years. Look at newer formulas, though, and you will often see something slightly different on the label: dihydroberberine, sometimes written as DHB or sold under the name GlucoVantage®.
They are closely related, they are not the same, and the difference is mostly about one thing: how much actually gets into your body.
What berberine is
Berberine is a bright yellow compound found in several plants, including barberry, goldenseal, Oregon grape and Chinese goldthread. It has a long history in traditional medicine.
The modern interest is in its role in glucose and fat metabolism. Much of that is linked to an enzyme called AMPK, often described as a cellular energy sensor — the same pathway that exercise switches on.
Berberine's problem: absorption
Very little of an oral dose of berberine reaches the bloodstream. Most estimates put it at under one percent.
That has two consequences. Studies use large amounts — typically 500mg taken two or three times a day. And because so much of it stays in the gut, stomach complaints are the most common side effect: cramping, bloating, constipation or diarrhea.
What dihydroberberine is
Dihydroberberine is a slightly modified form of berberine. It passes through the gut wall far more easily, and once absorbed, the body converts it back into berberine.
The idea is simple: get the same compound into circulation using a much smaller dose.
What the research says
The early work was in animals. In a 2008 study, researchers at Australia's Garvan Institute of Medical Research found that dihydroberberine was effective at considerably lower doses than berberine in rodents fed a high-fat diet (Turner et al., Diabetes, 2008).
The human data is newer and small. In a 2021 pilot trial, 100mg and 200mg doses of dihydroberberine produced higher blood levels of berberine than a 500mg dose of regular berberine (Moon et al., Nutrients). That study measured absorption in a handful of people. It did not measure long-term results.
So the honest summary: that dihydroberberine is better absorbed is reasonably supported. That it delivers better results in people is plausible, but not yet shown in large trials.
Side by side
| Berberine | Dihydroberberine | |
|---|---|---|
| Typical dose | 500mg, two to three times a day | 100–200mg, once or twice a day |
| Absorption | Low | Higher |
| Stomach comfort | Upset is common | Smaller dose, so less sits in the gut |
| Research | Large, decades of studies | Small, mostly recent |
Which one should you choose?
If you want the most-studied option and don't mind several doses a day, plain berberine is the conservative choice.
If you want a smaller dose you can take once, around your largest carbohydrate meal, dihydroberberine makes more sense. That is why it has become the preferred form in glucose disposal agents (what a GDA is).
Either way, take it with a meal that contains carbohydrate. That is when it has something to work with.
Safety first
Both forms influence glucose metabolism, and berberine also affects how the liver processes some medications. Talk to your doctor before taking either if you take any prescription medication — particularly for blood sugar, blood pressure or blood thinning — or if you have a diagnosed medical condition.
Neither is suitable during pregnancy or breastfeeding. And don't stack several berberine products on top of each other; check labels, because it now turns up in a lot of formulas.
Where Block fits
Block uses GlucoVantage® dihydroberberine as one of eleven ingredients, alongside chromium picolinate, gymnema, banaba, AstraGin® and the DigeZyme® digestive enzyme complex. It is taken as three capsules about 30 minutes before your biggest carbohydrate meal of the day.
Paired with Lean Sleep, our stimulant-free evening formula, it makes up the Fat Burn Stack.
The short version
Dihydroberberine is berberine in a form your body absorbs more easily, so it works at a fraction of the dose. Berberine has more research behind it; dihydroberberine is easier to take. Whichever you choose, check with your doctor first if you take medication.
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These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Consult your physician before use if you are pregnant, nursing, taking medication, or have a diagnosed medical condition.
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