How much skullcap should you take a day?

There's no established dose of skullcap for any specific outcome. The one number with human research behind it is 350 mg of American skullcap, taken three times a day (1,050 mg/day total) in a two-week clinical trial — a starting reference point, not a target to hit, since that trial itself found mixed results.

Where the 1,050 mg/day figure comes from

A 2014 randomized, placebo-controlled trial gave 43 healthy adults 350 mg capsules of American skullcap (Scutellaria lateriflora) three times daily for two weeks. That's the only dose with a controlled human trial behind it for any species of skullcap. The trial's anxiety-scale results didn't differ significantly from placebo, so this figure describes what was tested, not a dose shown to reliably do something. See skullcap benefits: what the research does and doesn't show for the full result.

An older 2003 trial also reported a positive result in healthy volunteers, but its published abstract doesn't state the dose used, so it can't be added to a dosing picture here.

American vs. Chinese skullcap doses

The 1,050 mg/day figure above is for American skullcap capsules. Chinese skullcap (Scutellaria baicalensis) has no human dosing trial for any outcome — its research is lab and animal work testing isolated compounds like baicalin, not the whole root at a stated daily amount a person could follow. A Chinese skullcap product's label directions reflect the manufacturer's own formulation decision, not a dose backed by a human trial.

Tea, tincture or capsule: the amount isn't the same

Dried herb steeped as tea, a liquid tincture measured in drops or milliliters, and a capsule with a stated milligram amount all deliver different, largely unstandardized quantities of the plant's active compounds. Only the capsule dose above has a specific number behind it; a cup of tea or a dropper of tincture doesn't translate to it in any established way.

Is there an upper limit?

No controlled human trial has tested a dose of skullcap above 1,050 mg/day, so there's no research-based ceiling to cite. That's different from saying higher amounts are safe — it means nobody has measured what a higher dose does. Case reports of liver injury linked to skullcap-containing products exist (see skullcap side effects), which is a separate concern from dose size and applies even at directed amounts in some reported cases.

Questions people ask

How much skullcap per day?

The only figure with a controlled human trial behind it is 350 mg of American skullcap, three times a day (1,050 mg/day total), tested for two weeks — and that trial's own anxiety-scale results were no different from placebo. Follow whatever a specific product's label directs rather than dosing to a number pulled from one trial.

How much skullcap is too much?

Not established. No human trial has tested a dose higher than 1,050 mg/day of American skullcap, and no dosing trial of any kind exists for Chinese skullcap, so there's no research-based line between an ordinary amount and too much.

What about skullcap for dogs?

This guide covers adult human use. Dosing a pet is a question for a veterinarian, who can account for the animal's weight, species and any medications — not something this guide is positioned to answer safely.

Is there a specific number for tincture or tea?

No. Tinctures and teas aren't standardized the way a capsule with a stated milligram amount is, and no trial has tested either form at a specific dose. Follow the product's own label directions.

Related reading: when is the best time to take skullcap, skullcap side effects, and how to choose a good skullcap.