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A 12-week, double-blind, quasi-randomized, placebo-controlled study to evaluate the efficacy and safety of Coleus forskohlii (Forcslim) on body weight loss.

Sadashiva Channangihalli Thimmegowda·Firoz Hirehal Hussain Mirza·Rajesh Venkataraman·Ravi B Nagarajaiah
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Abstract

BACKGROUND: Overweight and obesity have emerged as a global epidemic, significantly impacting human health. Traditional usage and growing scientific evidence suggest that Coleus forskohlii extract (Forcslim) may aid in reducing excess body weight and fat. This study aimed to evaluate the efficacy and safety of Forcslim supplementation in overweight individuals. METHODS: A quasi-randomized, double-blind, placebo-controlled clinical trial was conducted in 60 overweight subjects aged 20-70&#x2009;years over a period of 12&#x2009;weeks. The participants were assigned to receive either Forcslim or placebo. The key outcome measures included body weight, body mass index (BMI), body composition, and anthropometric parameters. Additionally, lipid profile parameters and safety markers (including metabolic, hepatic, and cardiovascular indicators) were assessed throughout the study duration. RESULTS: Compared to the placebo group, the Forcslim group showed significant reductions in waist circumference (-1.83&#x2009;cm; p&#x2009;<&#x2009;0.01) and body weight (-1.93&#x2009;kg; p&#x2009;<&#x2009;0.001). Significant improvements in anthropometric parameters were observed exclusively in the Forcslim group. Furthermore, triglyceride (TG) levels were significantly reduced (p&#x2009;<&#x2009;0.01), while high-density lipoprotein (HDL) levels showed a significant increase (p&#x2009;=&#x2009;0.001). No clinically significant changes were observed in metabolic markers, liver and muscle enzyme levels, heart rate, blood pressure, or reported adverse effects, indicating a favorable safety profile. CONCLUSIONS: Forcslim demonstrated significant anti-obesity effects, including reductions in body weight, waist circumference, and improvements in the lipid profile. These findings suggest that C. forskohlii extract supplementation may serve as a safe and effective alternative to synthetic anti-obesity drugs.

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HumansDouble-Blind MethodMiddle AgedMaleAdultFemalePlant ExtractsAgedTriglyceridesWeight LossOverweightBody Mass IndexYoung AdultBody CompositionColeusWaist CircumferenceObesityLipidsDietary SupplementsColeus forskohliiForskolinbody mass indexhigh density lipoprotein-cholesterolobesityJournal ArticleRandomized Controlled Trial

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Sadashiva Channangihalli Thimmegowda, Firoz Hirehal Hussain Mirza, Rajesh Venkataraman, Ravi B Nagarajaiah. 2026-09-01. A 12-week, double-blind, quasi-randomized, placebo-controlled study to evaluate the efficacy and safety of Coleus forskohlii (Forcslim) on body weight loss.. https://doi.org/10.1080/15502783.2026.2725137

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Journal Article; Randomized Controlled Trial resourceAdult subjectAged subjectBody Composition subjectBody Mass Index subjectColeus subjectColeus forskohlii subjectDietary Supplements subjectDouble-Blind Method subjectFemale subjectForskolin subjectHumans subjectJournal Article subjectLipids subjectMale subjectMiddle Aged subject

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