Does berberine have caffeine?

Berberine does not contain caffeine and isn't a stimulant. It's a plant alkaloid found in the bark and root of barberry, goldenseal and Oregon grape, chemically unrelated to caffeine's class of compounds. No published trial reports berberine producing caffeine-like effects — increased heart rate, alertness or jitteriness. The effects documented in its research are on blood sugar and lipid markers, not energy.

What the evidence doesn't support

It doesn't support treating berberine as a source of caffeine or an energy stimulant — nothing in its pharmacology or trial record works that way. It doesn't support the idea that a berberine supplement will produce a jolt of alertness the way coffee, tea or a pre-workout does. And it doesn't support "berberine without caffeine" as a meaningful distinction for a plain berberine product, since caffeine was never one of its components to begin with.

What the trials found

Berberine trials measure metabolic markers — fasting glucose, HbA1c, cholesterol, triglycerides — not energy, alertness or heart rate, so there's no dedicated study measuring whether berberine feels stimulating. What the safety literature does report is consistent with a non-stimulant: a 2008 randomized, placebo-controlled trial of berberine at 1.0 g a day for three months in 116 adults with type 2 diabetes and dyslipidemia recorded mild to moderate constipation in five participants as the notable side effect, with no cardiovascular or stimulant-type effects reported in either group. A 2026 review of berberine's drug-interaction mechanisms describes its documented pharmacological activity as centered on liver enzymes, drug transporters and blood-sugar-lowering medications — again, nothing resembling a stimulant profile.

Where caffeine and berberine do turn up together is in some multi-ingredient "metabolism" or weight-loss blends, which add caffeine (often as green tea extract or plain caffeine) alongside berberine as a separate ingredient. That's a formulation choice by whoever makes the blend, not something berberine itself contributes — a single-ingredient berberine product has no caffeine in it unless caffeine is listed separately on the panel.

Questions people ask

Does berberine have caffeine in it?

No. Berberine is a plant alkaloid with a different chemical structure than caffeine, and no trial or pharmacology review describes it containing or acting like caffeine.

Is berberine a stimulant?

Not based on anything in its published research. Its documented effects are on metabolic markers and its documented side effects are gastrointestinal — nothing in the literature describes a stimulant effect.

Can I take berberine with caffeine (coffee, tea or a pre-workout)?

We haven't found a study testing that combination directly. Caffeine and berberine affect the body through different mechanisms, and we haven't found a documented interaction between them, but "untested together" and "confirmed fine together" aren't the same claim. If you take a stimulant supplement regularly and also take a prescription medication, mention the full combination to a doctor or pharmacist, since berberine has its own separate list of documented drug interactions.

When to talk to a doctor

A supplement question about caffeine content isn't a substitute for checking your own sensitivity to stimulants, which varies by person and by medical history — including heart rhythm issues or anxiety, where a doctor is the right first stop regardless of what any single ingredient contains. Berberine on its own is not a treatment for low energy or fatigue, and its research doesn't address either outcome.

Related reading: what is berberine? a plain guide, berberine side effects: what's actually reported, and berberine and medications: what to check.