Forskolin
Useful mainly for limited; popularly marketed for weight loss but evidence is weak.
Quick decision guide
May help most
limited; popularly marketed for weight loss but evidence is weak
Common dosing range
250 mg Coleus forskohlii (10% forskolin) twice daily
When to expect effects
Not reliably established
Watch out for
may lower blood pressure and increase bleeding risk
What is it
Forskolin is a labdane diterpene compound extracted from the roots of Coleus forskohlii (also known as Plectranthus barbatus), a plant used in traditional Ayurvedic medicine. It is widely studied in cell biology for its ability to directly activate adenylyl cyclase and is marketed in supplements for weight loss, body composition, and cardiovascular support.
Is it worth it for you?
Use this as a quick fit check, not a diagnosis.
Worth considering if…
Probably skip if…
Evidence at a glance
| Goal | Effect | Best fit | Time |
|---|---|---|---|
body composition / weight management Mixed Evidence | Small and inconsistent | uncertain; some signal for body-fat change in small trials | Weeks (if at all) |
body composition / weight management
- Effect
- Small and inconsistent
- Best fit
- uncertain; some signal for body-fat change in small trials
- Time
- Weeks (if at all)
Evidence for 1 use
AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.
body composition / weight management
Supplement benefitOral forskolin is poorly absorbed, limiting how its strong laboratory activity on adenylyl cyclase translates to people. Small clinical trials show inconsistent results, with at most modest body-composition changes and no reliable weight loss. The evidence base is small and conflicting.
Bottom line: Does not reliably aid weight loss; any body-composition effect is small and unproven.
Evidence is mixed
A few small trials suggest minor body-fat changes while others show no benefit; poor oral absorption undercuts efficacy.
How it works
How to take it
What to track
3 commercial forms
Compare the main delivery options and what they’re best suited for.
Coleus forskohlii extract (standardized to 10% forskolin)
The most commonly studied supplement form. Comes from the root of the plant.
Oral bioavailability is low
High-percent forskolin extracts (20-40%)
Higher concentration extracts, allowing smaller capsules. No clinical evidence that higher standardization yields better outcomes.
Same low oral bioavailability
Coleus forskohlii root powder
Used in traditional Ayurvedic preparations; less standardized.
Variable forskolin content
Safety
Know the common side effects, key cautions, and who should avoid it.
Common side effects
Who should avoid it
- pregnant or breastfeeding women
- people with low blood pressure or bleeding disorders
- people with gastric ulcers or on anticoagulants/antihypertensives
Pregnancy & breastfeeding
Avoid in pregnancy and breastfeeding due to insufficient safety data.
Interactions
may amplify blood-pressure lowering
may increase bleeding risk
additive cardiovascular effects
Choosing a product
What to look for on the label — and what to be skeptical of.
Look for…
Be skeptical of…
Frequently asked questions
Does forskolin really help with weight loss?⌄
Clinical evidence is weak. Some studies show small changes in body composition, but most do not show meaningful weight loss versus placebo.
Is forskolin the same as Coleus?⌄
Forskolin is the active compound. 'Coleus' usually refers to Coleus forskohlii (Plectranthus barbatus), the plant it comes from. Supplements may list either name.
Can forskolin lower my blood pressure too much?⌄
Forskolin has blood-pressure-lowering activity. People on antihypertensive medications or with low baseline blood pressure should monitor for lightheadedness or dizziness.
Why are laboratory effects so much stronger than supplement effects?⌄
Most laboratory studies of forskolin use direct application to cells or IV administration. Oral forskolin is poorly absorbed, so much of the in-vitro potency does not translate.
Is forskolin safe long-term?⌄
Most supplement studies have been short (8-12 weeks). Long-term safety is not well established. Monitor for cardiovascular and gastrointestinal effects with prolonged use.
References by claim
Track Forskolin with Pilora
Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.
Coming to App StoreDisclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.