# ForsLean (Coleus forskohlii extract)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/forslean
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-04-01
**Evidence Score:** 2 / 10
**Category:** Other
**Also Known As:** Coleus forskohlii extract, Forskolin extract, Plectranthus barbatus, Indian Coleus, Makandi, Patharchur, Colforsin, Forskolin root extract, Ayurvedic Coleus

## Overview

ForsLean is a patented Coleus forskohlii root extract standardized to 10% forskolin, a labdane diterpene that directly activates adenylyl cyclase to raise intracellular cyclic AMP (cAMP) levels. Elevated cAMP activates protein kinase A, accelerating lipolysis and supporting favorable changes in [body composition](/ingredients/condition/weight-management).

## Health Benefits

• Reduces body fat percentage: Clinical trial showed reduction from 28.3% to 26.5% over 12 weeks (moderate evidence)
• Increases lean body mass: Significant improvements observed in the same 12-week study (moderate evidence)
• Decreases hip circumference: Statistically significant reduction demonstrated in overweight/obese adults (moderate evidence)
• Supports [cardiovascular](/ingredients/condition/heart-health) function: Acts as a vasodilator and positive inotropic agent (preliminary evidence)
• Promotes fat [metabolism](/ingredients/condition/weight-management): Activates hormone-sensitive lipase for enhanced lipolysis (mechanistic evidence)

## Mechanism of Action

Forskolin, the primary bioactive in ForsLean, directly activates the enzyme adenylyl cyclase independent of G-protein receptor stimulation, converting ATP to cyclic AMP (cAMP). Elevated intracellular cAMP activates protein kinase A (PKA), which phosphorylates hormone-sensitive lipase (HSL), triggering the breakdown of stored triglycerides into free fatty acids via lipolysis. Simultaneously, PKA activation may stimulate [thyroid](/ingredients/condition/hormonal) hormone secretion and increase expression of androgen receptors in skeletal muscle, contributing to lean mass preservation and gains.

## Clinical Summary

The most cited human trial is a randomized, double-blind, placebo-controlled study by Godard et al. (2005) involving 30 overweight men over 12 weeks using 250 mg of ForsLean (10% forskolin) twice daily. Subjects in the ForsLean group demonstrated a statistically significant reduction in body fat percentage from approximately 28.3% to 26.5% and significant increases in lean body mass compared to placebo. A parallel study in overweight women showed attenuation of weight gain rather than active fat loss, suggesting sex-dependent responses. Overall evidence is rated moderate, as most trials use small sample sizes and short durations, and independent replication remains limited.

## Nutritional Profile

ForsLean is a standardized extract of Coleus forskohlii root, standardized to 10% forskolin (the primary bioactive diterpene compound). At a typical 250mg serving dose, this provides approximately 25mg of active forskolin. Forskolin (7beta-acetoxy-8,13-epoxy-1alpha,6beta,9alpha-trihydroxy-labd-14-ene-11-one) is a labdane-type diterpene that functions as the principal bioactive constituent. The extract contains negligible macronutrients — essentially zero protein, fat, and carbohydrates at typical supplemental doses. No meaningful vitamins or dietary minerals are present in pharmacologically relevant quantities. Additional minor diterpene compounds present in the root extract include 1,9-dideoxyforskolin, deacetylforskolin, and 9-deoxyforskolin, though these are present in smaller concentrations and have lower biological activity than forskolin itself. Forskolin bioavailability is moderate; it is lipophilic and absorbs reasonably well through the gastrointestinal tract, with peak plasma concentrations typically reached within 1–2 hours post-ingestion. Absorption may be enhanced when taken with a small amount of dietary fat due to its lipophilic nature. The mechanism of action is well-characterized: forskolin directly activates adenylyl cyclase, raising intracellular cyclic AMP (cAMP) levels, which in turn activates protein kinase A (PKA), stimulating hormone-sensitive lipase and promoting lipolysis. No fiber, amino acids, or essential fatty acids are present at meaningful levels in this extract.

## Dosage & Preparation

Clinically studied dosage: 250mg twice daily (500mg total) of ForsLean standardized to 10% forskolin, providing 25mg active forskolin daily, taken for 12 weeks. Available in standardized forms containing 10-98% forskolin, typically in capsule form. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

ForsLean is generally well tolerated at the clinically studied dose of 250 mg twice daily, with mild gastrointestinal discomfort and transient hypotension reported in some users due to forskolin's vasodilatory cAMP-mediated effects. It carries a significant interaction risk with antihypertensive medications, anticoagulants such as warfarin, and antiplatelet drugs because forskolin can potentiate vasodilation and inhibit platelet aggregation. Individuals with bleeding disorders, hypotension, or those taking beta-blockers should avoid use without physician supervision, as cAMP elevation can increase heart rate and alter cardiac contractility. Safety data during pregnancy and lactation are insufficient, and use is not recommended in these populations.

## Scientific Research

A randomized, double-blind, placebo-controlled trial tested ForsLean (10% forskolin) at 500mg daily for 12 weeks in 36 overweight/obese adults (30 completed), demonstrating significant reductions in body fat percentage and hip circumference with increases in lean body mass. No meta-analyses or additional RCTs were identified in the available research, though the primary study reported no adverse events or changes in vital signs.

## Historical & Cultural Context

Coleus forskohlii roots have been used in Indian traditional medicine (Ayurveda) as part of vegetarian meals and for various pharmacological properties. Modern scientific interest arose from its identification as a source of the diterpene compound forskolin, though specific traditional applications and duration of use are not well documented.

## Synergistic Combinations

Green tea extract, CLA (conjugated linoleic acid), chromium picolinate, L-carnitine, cayenne pepper extract

## Frequently Asked Questions

### What is the clinical dose of ForsLean used in studies?

The most well-documented clinical protocol uses 250 mg of ForsLean extract (standardized to 10% forskolin, delivering 25 mg active forskolin per dose) taken twice daily, totaling 500 mg of extract or 50 mg forskolin per day. This dose was used in the Godard et al. 2005 randomized controlled trial over 12 weeks and is the benchmark for current supplement formulations.

### How long does it take for ForsLean to show results?

The primary 12-week clinical trial by Godard et al. observed statistically significant reductions in body fat percentage and increases in lean body mass within that timeframe at 250 mg twice daily. No shorter-duration controlled trials exist to confirm meaningful body composition changes before the 8-to-12-week mark, making at least three months of consistent use the evidence-supported minimum.

### Does ForsLean increase testosterone levels?

The Godard et al. 2005 trial reported a trend toward increased serum free testosterone in the ForsLean group compared to placebo in overweight men, though the finding did not reach strong statistical significance. The proposed mechanism involves cAMP-mediated upregulation of androgen receptor expression and possible stimulation of luteinizing hormone (LH) release, but this effect has not been independently replicated in larger trials and should not be considered a confirmed benefit.

### Can ForsLean be taken with caffeine or stimulant fat burners?

Combining ForsLean with caffeine is pharmacologically plausible because caffeine inhibits phosphodiesterase (PDE), the enzyme that degrades cAMP, while forskolin increases cAMP production—together potentially amplifying lipolytic signaling. However, this combination also additively raises heart rate and blood pressure, increasing cardiovascular stress, particularly in individuals sensitive to stimulants. No controlled human trials have directly studied this combination for safety or efficacy, so caution and medical guidance are advised.

### Is ForsLean the same as generic Coleus forskohlii extract?

ForsLean is a patented, proprietary extract from Sabinsa Corporation standardized to exactly 10% forskolin by verified HPLC analysis, with documented quality controls and the specific root material used in peer-reviewed clinical trials. Generic Coleus forskohlii extracts vary widely in standardization (ranging from 1% to 20% forskolin), sourcing, and manufacturing consistency, meaning clinical data generated using ForsLean cannot be directly extrapolated to unverified generic versions.

### Is ForsLean safe to take with blood pressure medications?

ForsLean may have cardiovascular effects due to its vasodilatory properties, so it's important to consult your healthcare provider before combining it with blood pressure medications. Some studies suggest ForsLean can support cardiovascular function, which could theoretically interact with antihypertensive drugs. Your doctor can assess whether ForsLean is appropriate based on your specific medication regimen and health status.

### Who is the best candidate for ForsLean supplementation—athletes, overweight adults, or both?

ForsLean appears most beneficial for overweight and obese adults, as clinical evidence shows significant reductions in body fat percentage and hip circumference in this population. While the ingredient may also support lean body mass gains, it's not specifically marketed as a performance supplement for athletes. Individuals seeking body composition improvements through diet and exercise may see the most meaningful results with ForsLean supplementation.

### Does the forskohlii plant contain ForsLean naturally, or is it only available as a standardized extract?

ForsLean is a branded, standardized extract of Coleus forskohlii that is concentrated and processed to ensure consistent potency—it's not simply the whole plant material. The forskohlii plant does contain forskolins naturally, but ForsLean is specifically formulated to deliver a reliable dose of the active compound. This standardization makes ForsLean more effective for consistent supplementation compared to raw plant material.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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