Berberine and magnesium: taking them together

Berberine and magnesium are commonly searched together, but they're two separate questions. First: no trial has tested a berberine and magnesium supplement taken together, and no interaction between them is documented. Second: "magnesium stearate," the phrase behind some of these searches, is a capsule-manufacturing ingredient, not a magnesium supplement — Electric Tiger Berberine doesn't use it either way.

Taking a berberine and a magnesium supplement together

Electric Tiger Berberine is a single-ingredient product and contains no added magnesium. We haven't found a published trial testing berberine alongside a magnesium supplement, or a documented interaction between the two. A 2026 review of berberine's drug-interaction mechanisms covers liver enzymes, drug transporters and additive effects with certain medication classes — magnesium isn't among the pathways it documents or flags. If you take both as separate products, there's no established reason to avoid it at ordinary supplement doses, though anyone with kidney disease should ask a doctor before adding any magnesium supplement, since impaired kidneys can't clear excess magnesium as effectively.

"Magnesium stearate" isn't a magnesium supplement

Magnesium stearate is a common capsule and tablet lubricant — magnesium bound to stearic acid, used in small amounts (typically under 1-2% of a capsule's total weight) to keep ingredients from sticking to manufacturing equipment. It's generally recognized as safe by the FDA for use in supplements and food. The amount it contributes is far too small to function as a magnesium supplement, even though the ingredient does technically contain a trace of the mineral. Searching for "berberine without magnesium stearate" is a question about capsule fillers, not about pairing berberine with a magnesium supplement — the two are unrelated topics that happen to share a word.

What's in Electric Tiger Berberine's capsule

Our capsule (the vegetable capsule shell itself, plus flow agents) uses cellulose, microcrystalline cellulose (MCC), L-leucine and olive oil. It does not contain magnesium stearate. See berberine without fillers for the full list and what each ingredient does.

Our product

Electric Tiger Berberine is 800 mg of berberine HCl extract, standardized to 8%, for about 73 mg of berberine per two-capsule serving. Full label here.

Questions people ask

Can you take berberine and magnesium together?

We haven't found a documented interaction between the two, or a trial that tested them combined. Electric Tiger Berberine doesn't contain magnesium; if you want both, you'd need a separate magnesium product.

Can I take berberine with magnesium glycinate?

Same answer as any magnesium form: no documented interaction or combination trial that we've found. They're two separate supplements taken alongside each other, not a tested pairing.

Does berberine contain magnesium stearate?

No. Electric Tiger Berberine's capsule uses cellulose, microcrystalline cellulose, L-leucine and olive oil. Magnesium stearate is a different, common capsule-manufacturing ingredient that some other products use and ours doesn't.

Is magnesium stearate the same as a magnesium supplement?

No. It's a lubricant used in tiny amounts during capsule manufacturing, not a dosed nutrient. If you're looking for a magnesium supplement specifically, check the supplement facts panel for an elemental magnesium amount, not the "other ingredients" list.

Related reading: berberine without fillers, berberine and medications: what to check, and how to choose a good berberine.