How to choose a good forskolin (Coleus forskohlii)

Choosing a forskolin product mostly comes down to reading the standardization percentage on the label, comparing the dose against the only two human trials that exist, and checking fillers, price per serving, and testing — the same checks that apply to any extract-based supplement.

Standardization percentage, not just the milligram number

A label listing "500 mg of Coleus forskohlii extract" doesn't tell you how much forskolin is actually inside unless it also states a standardization percentage. Extract standardized to 10% forskolin contains roughly ten times as much of the compound, milligram for milligram, as one standardized to 1%. Both existing placebo-controlled human trials used a 10% standardization, so that's the one figure with any human data behind it (PMID 16129715, PMID 18500958). A product that only lists total extract weight, with no percentage, doesn't let you compare it to that research at all.

Dose against what's actually been tested

The two human trials on body composition both used 250 mg of a 10% extract, twice a day — 500 mg of extract, or about 50 mg of forskolin, per day. See how much forskolin should you take a day? for what that amount did and didn't show in each trial, and forskolin benefits: what the research does and doesn't show for the results themselves. A dose well outside that range, in either direction, isn't backed by more or less evidence just because the number on the label is bigger or smaller — there's simply no trial data at any other amount.

Fillers and other ingredients

Check the "other ingredients" line for what's added beyond the forskolin extract itself — a capsule shell, a flow agent, or, in a blended product, other herbs or stimulants. Forskolin is sometimes sold in "fat burner" blends alongside caffeine or other stimulants; a blend makes it harder to know which ingredient, if any, is responsible for anything you notice, and it changes the safety picture from the extract alone.

Price per serving

Because standardization percentages vary by product, price per bottle tells you little on its own. Price per serving — and what that serving actually delivers in milligrams of extract and forskolin content — is the number that lets you compare two products fairly.

Third-party testing

A certificate of analysis (COA) confirms a specific batch was tested for identity and contaminants by an independent lab. "Third-party tested" only means something when a batch has a linked, available COA to go with it — no link means there's nothing to check.

Questions people ask

Where can I buy forskolin?

Forskolin extract is widely sold through supplement retailers, in capsules and in blended "fat burner" formulas. This page doesn't recommend a specific seller — the checks above (standardization, dose context, fillers, price per serving, testing) apply no matter where you buy it.

Which forskolin supplement should I choose?

That depends on what a label actually states, not a marketing claim on the packaging. The standardization percentage and total extract amount tell you more than a review score — see forskolin benefits: what the research does and doesn't show for how thin the evidence actually is, regardless of which product you pick.

Which forskolin brand should I trust?

No brand has research specifically behind it beyond the two trials covered on this site, both of which used a generic 10%-standardized extract, not a particular commercial brand. Use the checklist above — standardization, dose, fillers, price per serving, and testing — to compare any two products on their own terms.

Related reading: what is forskolin? A plain guide, how much forskolin should you take a day?, and forskolin side effects.