Guide
What is berberine? A plain guide
Berberine is a plant alkaloid studied mostly at 900 mg to 1.5 g a day; our serving provides about 73 mg, and this guide lays out what's actually on our label versus what's been studied.
Berberine is a bright-yellow alkaloid found in the bark and root of plants such as barberry, goldenseal and Oregon grape, used in traditional practice for centuries and studied in modern trials mostly at 900 mg to 1.5 g a day. Electric Tiger's Berberine is a bark-and-root extract standardized to 8%, giving about 73 mg of berberine per two-capsule serving — well under what most trials tested.
Where berberine comes from
Berberine is an isoquinoline alkaloid present in several plants, including Berberis species (barberry), Coptis chinensis (Chinese goldthread) and Hydrastis canadensis (goldenseal). It's extracted from the bark and root of these plants and sold as berberine hydrochloride (HCl) — the salt form used in nearly every clinical trial and in our own extract. Plants containing it have a long history in Ayurvedic and Traditional Chinese medicine practices; modern research has mostly isolated and studied the compound on its own rather than the whole plant.
Berberine HCl vs. other forms on the market
Most research and most labels, including ours, use berberine hydrochloride — the plain salt form. Two other forms show up in marketing: berberine phytosome, which binds berberine to a phospholipid carrier and is marketed for better absorption, and dihydroberberine, a reduced form of the molecule marketed the same way. We don't carry either form, and we don't have head-to-head absorption data comparing them with our HCl extract, so we're not making a claim either way.
What's actually in Electric Tiger Berberine
Two capsules a day provide 800 mg of berberine HCl extract, standardized to deliver about 73 mg of berberine:
| Panel line | Extract | Standardization | Berberine |
|---|---|---|---|
| Berberine HCl extract (bark/root) | 790 mg | 8% | ≈63.2 mg |
| Berberine HCl extract (bark) | 10 mg | 97% | ≈9.7 mg |
| Per serving | 800 mg | — | ≈73 mg |
The "800 mg" on the front of a berberine label is the weight of the extract, not the amount of berberine in it — worth knowing, since two products can both say "800 mg" and deliver very different amounts of the compound itself. Other ingredients are cellulose (vegetable capsule), microcrystalline cellulose, L-leucine and olive oil. The product is vegan, gluten-free, allergen-free and non-GMO, 30 servings a bottle, as low as $17.34 a bottle on subscription — about $0.58 a serving.
What the research has studied, and the dose gap
Berberine has a large body of clinical research behind it, almost all of it run at 900 mg to 1.5 g a day for one to three months, with a pooled trial range as low as 300 mg a day on the low end. Our serving provides about 73 mg — roughly 8% of the low end of that range. See how much berberine did the studies use for the dose used in each trial, and berberine: what the research shows for what those trials measured. Because our dose doesn't reach the amounts studied, we don't claim this product produces those results.
How it's usually taken
Our label directs two capsules a day with 6-8 oz of water. See how much berberine should you take a day and when to take it for more on dose and timing.
Questions people ask
What does berberine do?
Most of what's published about berberine comes from clinical trials at 900 mg to 1.5 g a day, well above the ~73 mg in our serving. We describe what the ingredient is and what our label provides; for what those higher-dose trials actually measured, see berberine: what the research shows.
How does berberine work?
Most published mechanism research comes from cell and animal studies, at concentrations well above what a 73 mg serving delivers in a person. We don't have a mechanism claim to make for this product at that dose.
What foods contain berberine?
Berberine isn't really a food nutrient. It comes from the bark and root of plants such as barberry, goldenseal and Oregon grape — used medicinally rather than eaten as food — so you won't get a meaningful amount from diet.
What is berberine HCl?
HCl stands for hydrochloride, the salt form of berberine used in almost every clinical trial and in most supplements, including ours. It's the same active alkaloid; the "HCl" describes the salt it's bound to for stability and handling, not a different compound.
Is berberine natural?
Yes — it's a naturally occurring plant alkaloid, extracted rather than synthesized. Being naturally derived doesn't by itself say anything about dose or effect; see the dose gap above for why that distinction matters here.
What is berberine phytosome?
A phytosome binds berberine to a phospholipid carrier, marketed as a way to improve absorption compared with plain HCl. Electric Tiger Berberine uses the HCl extract, not a phytosome, and we don't have comparative absorption data to say which form performs better.
What is dihydroberberine?
Dihydroberberine is a chemically reduced form of berberine, also marketed for absorption reasons. It isn't the form used in most of the clinical research described above, and it isn't the form in our product.
Related reading: berberine benefits: what's established and what isn't and how to choose a good berberine.
Sources
- Effects of administering berberine alone or in combination on type 2 diabetes mellitus: a systematic review and meta-analysis Across 50 trials, most studies gave 0.9–1.5 g of berberine a day for one to three months.
- Efficacy and safety of berberine on the components of metabolic syndrome: a systematic review and meta-analysis of randomized placebo-controlled trials Across 12 placebo-controlled trials, 0.3–1.5 g a day lowered triglycerides and waist size slightly; blood pressure and HDL did not change.
- Berberine-Drug Interactions: Mechanisms, Clinical Relevance and Risk Stratification-A Narrative Review A 2026 review named barberry, Chinese goldthread and goldenseal as berberine's plant sources and found it can raise blood levels of some other drugs even though very little berberine itself reaches the bloodstream.
*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.
