Stack Genius ingredient guide
Coleus Forskohlii
Coleus forskohlii (Plectranthus barbatus) is a South Asian mint whose root contains forskolin, a compound that activates the enzyme adenylate cyclase.
Overview
Coleus forskohlii is a perennial mint native to India, Nepal, and other parts of South Asia. Its thick, aromatic roots contain forskolin, a diterpene molecule that has been studied since the 1970s for its ability to activate adenylate cyclase, an enzyme that raises intracellular cyclic AMP. That single mechanism is behind most of the ingredient's supplement applications.
You will encounter coleus forskohlii most often in weight-management and body-composition blends, thermogenic fat-burners, and occasionally in cardiovascular or eye-health formulas. Extracts are typically standardized to 10% or 20% forskolin, and it is the standardization number, not the total root milligrams, that determines what you are actually getting.
Because forskolin is a bioactive that touches several body systems, coleus forskohlii is not a gentle background herb. It has notable considerations for people on blood pressure or blood-thinning medication, and the human evidence for popular claims is more limited than marketing materials suggest.
Key takeaways
- The active constituent forskolin is what drives forskohlii's supplement popularity.
- Products are standardized by forskolin percentage, which matters more than raw root weight.
- It has meaningful interactions with blood pressure and blood-thinning medications.
Practical guidance
What to know before adding Coleus Forskohlii
Evidence snapshot
Human trials on coleus forskohlii for weight and body composition have shown mixed results with small sample sizes, and independent reviewers have called for larger, longer studies. The underlying pharmacology of forskolin is well characterized in cell studies, but translating that mechanism into consistent clinical outcomes has been inconsistent.
What to look for on the label
The critical number is the forskolin percentage of the extract (commonly 10% or 20%) and the total forskolin milligrams per serving. Confirm the label lists the root as the plant part used, since aerial parts contain far less forskolin. Beware proprietary blends that hide the actual forskolin dose.
What makes a better product
A stronger coleus forskohlii product uses root-only material, discloses the forskolin percentage and per-serving milligrams clearly, and is packaged in materials that protect against oxidation and moisture. Because coleus is often adulterated in bulk trade, brands that publish supplier documentation and species verification give you more confidence in what is in the bottle.
Watch-outs
Forskolin can lower blood pressure and thin blood, so it should be avoided or monitored carefully with antihypertensive, anticoagulant, or antiplatelet medications. Some users report flushing, low blood pressure symptoms, or GI upset. It is not appropriate for people with active ulcers, bleeding disorders, or those pending surgery.
Dosing & Timing
Studies most commonly use a 10% or 20% forskolin standardized extract providing about 25 mg to 50 mg of forskolin per day, often split into two doses. Taking it with food may reduce GI upset. Cycled use is more common than continuous long-term use in consumer settings.
Safety and interaction context
The main safety issue is cardiovascular overlap: forskolin can lower blood pressure and may increase bleeding tendency, so blood pressure drugs, anticoagulants, antiplatelet drugs, and surgery planning all deserve medical review. Pregnancy and nursing are poor contexts for self-experimenting.
Sources
- NCCIH Herbs at a GlanceHerbal ingredient evaluation reference
- NCCIH Using Dietary Supplements WiselyWeighing supplement claims and evidence
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