Coleus Forskohlii and Testosterone: Does It Work?

By Noophoric Editorial Team Updated August 31, 2026

Coleus forskohlii is a botanical source of forskolin, a compound that influences cellular signaling involved in metabolism and steroid hormone production. One controlled human trial in overweight men reported favorable changes in body composition and free testosterone over 12 weeks. The evidence is promising but still limited, which is why forskolin makes more sense as one researched component of a complete men’s formula than as a stand-alone treatment for low testosterone.

Coleus forskohlii has a history of use in Ayurvedic traditions. Modern supplements usually standardize the root extract to a specified percentage of forskolin so the amount of the active compound is more consistent.

How forskolin works

Forskolin activates an enzyme called adenylyl cyclase, which can increase cyclic adenosine monophosphate, or cAMP, inside cells. cAMP acts as a messenger in many biological processes, including the signaling involved in energy use, smooth-muscle tone, and steroidogenesis.

This mechanism provides a plausible explanation for interest in testosterone and body composition. A plausible mechanism is not the same as a proven outcome, so human trials remain the most important evidence.

The key human study

The best-known randomized, double-blind trial enrolled 30 overweight and obese men. Participants received a forskolin extract or placebo for 12 weeks. The forskolin group experienced favorable changes in body fat and bone mass. Free testosterone increased over time in the forskolin group, while the between-group change in total testosterone was not statistically significant.

This study is encouraging because it measured human outcomes under controlled conditions. It is also only one small trial in a specific population. It does not tell us whether every man, dose, extract, or formula will produce the same response.

Why the extract and dose matter

“Coleus forskohlii” on a label does not tell the full story. Root powder, non-standardized extract, and an extract standardized for forskolin are not equivalent. Two products can list the same botanical name while delivering very different amounts of forskolin.

Look for a transparent Supplement Facts panel that states the dose and, when applicable, the standardization. This is one reason a complete formula should be evaluated by its exact ingredients and amounts, not by a single recognizable herb on the front label.

Forskolin as part of a multi-ingredient formula

Healthy testosterone production is influenced by more than one pathway. Stress, sleep, micronutrient status, body composition, exercise, and age all matter. A multi-ingredient formula can combine botanicals and nutrients selected for complementary roles rather than asking one compound to do everything.

Noophoric Men’s+ provides 250 mg of Coleus forskohlii alongside KSM-66 ashwagandha, tongkat ali, fenugreek, boron, zinc, vitamin D3, vitamin K2, and other ingredients in a daily formula designed to support healthy testosterone levels, energy, drive, and resilience.*

For a closer look at another botanical in the formula, see our evidence review of ashwagandha and testosterone.

What forskolin is not

Forskolin is not testosterone, an anabolic steroid, or testosterone replacement therapy. It should not be used to self-treat confirmed hypogonadism. Men with persistent symptoms such as reduced libido, fewer spontaneous erections, infertility, unexplained anemia, or low bone density should seek appropriate testing.

Our guide to testosterone testing and interpretation explains why diagnosis normally requires symptoms plus repeat early-morning results.

Possible side effects and interactions

Clinical information on long-term oral forskolin use is limited. Reported or plausible effects include digestive upset, headache, flushing, dizziness, and lower blood pressure. Because forskolin may affect blood-vessel tone and platelet activity, caution is important for people who take blood-pressure medication, nitrates, anticoagulants, or antiplatelet drugs.

Discuss use with a clinician before surgery, during pregnancy or breastfeeding, or when you have a cardiovascular condition. Do not assume that a botanical cannot interact with medication.

How to evaluate a testosterone-support supplement

Full label transparency: Exact amounts make it possible to assess the formula.
Standardized botanicals: A defined extract is more meaningful than an unidentified herb powder.
Complementary ingredients: The formula should support more than one aspect of male wellness.
Realistic claims: Supplements support normal physiology and should not be marketed as a cure for low testosterone.
Responsible use: Follow the label and review medications, health conditions, and other supplements.

Lifestyle still determines the foundation

No botanical can compensate for chronic sleep loss, severe calorie restriction, excessive alcohol use, untreated sleep apnea, or poor recovery. Resistance training, adequate protein and calories, healthy body composition, and consistent sleep should sit underneath any supplement routine.

See our guide to supporting healthy testosterone naturally for practical steps that can be combined with a well-designed formula.

Frequently asked questions

Does forskolin raise testosterone?

A small controlled trial in overweight men reported an increase in free testosterone over time, while the total testosterone difference was not statistically clear. More large human trials are needed to define who is most likely to respond.

How long was forskolin studied?

The commonly cited human trial lasted 12 weeks. That supports evaluating a consistent routine over months rather than expecting an immediate effect.

Is Coleus forskohlii the same as forskolin?

Coleus forskohlii is the plant. Forskolin is one of its active compounds. Standardized extracts state how much forskolin they are intended to provide.

Can forskolin be combined with ashwagandha?

They are used together in some multi-ingredient men’s formulas because they act through different pathways. Review the complete label and ask a clinician about medication or condition-specific concerns.

Who should avoid forskolin?

People using blood thinners, antiplatelet drugs, nitrates, or blood-pressure medication should obtain professional guidance. Extra caution is also appropriate before surgery and during pregnancy or breastfeeding.

Bottom line

Coleus forskohlii has a biologically plausible mechanism and an encouraging human trial related to free testosterone and body composition. That makes it a rational ingredient in a thoughtfully constructed men’s formula, while the limited research means it should not be presented as a stand-alone treatment. Evaluate the extract, dose, complete formula, safety, and lifestyle foundation together.

Sources

Evidence reviewed August 2026. This article is educational and is not a substitute for individualized medical diagnosis or treatment. *These statements have not been evaluated by the Food and Drug Administration. Noophoric products are not intended to diagnose, treat, cure, or prevent any disease.