| Ingredient | Extract | Standardization | Nominal marker |
|---|---|---|---|
| Coleus forskohlii root extract | 250 mg | 10% forskolin | About 25 mg forskolin per two capsules |
The marker figure is arithmetic based on the merchant’s published percentage, not independent laboratory verification. Confirm the label on the bottle.
What the formula discloses
The manufacturer’s current US ingredient panel gives 250 mg ForsLean-branded Coleus forskohlii root extract at 10% forskolin in a two-capsule serving. Multiplication yields 25 mg nominal forskolin. The trademark indicates a named ingredient supplier, not that the entire Fat Burn Active formula has been tested for weight loss. The calculation also is not an independent assay of the bottle in your hand; compare the actual package if you buy.
This figure has to be read alongside the other ingredients: green tea, guarana, phenylcapsaicin, bitter orange, grains of paradise, caffeine, piperine, and micronutrients. A study of isolated Coleus extract does not show which ingredient, if any, drives a result when all are combined. Even a similar nominal forskolin amount may not mean equivalent extract quality, delivery, or daily schedule.
Mechanism is the start of a question
Forskolin is discussed in laboratory research because it can influence the cyclic-AMP signaling pathway. Mechanistic plausibility does not specify how many calories a human will expend or how much body fat will change in real life. The merchant describes lipase activation, increased thermogenesis, and lean-mass benefits; those are marketing interpretations that require separate human outcome evidence. Be especially careful when a cellular result is presented as though it were a measured clinical result in buyers of this bottle.
The NIH Office of Dietary Supplements says forskolin has not been studied much and, so far, does not appear to affect body weight or appetite. That summary does not prove every future formulation will fail. It does set a sensible baseline: any stronger product-specific claim needs direct, well-designed evidence rather than a chain of mechanisms and branded-ingredient references.
Compare the small human studies fairly
In a randomized trial involving 30 completers with overweight or obesity, participants received 250 mg Coleus extract twice daily or placebo for 12 weeks, and both groups were advised to follow a reduced-calorie diet. Waist and hip measurements improved in both groups. The extract group showed favorable changes in some insulin-related markers; this does not establish additional weight loss caused by Fat Burn Active. The studied schedule provided 500 mg extract daily, twice the product page’s listed 250 mg daily, and the finished products were not the same.
A different controlled study in mildly overweight women did not find significant differences in fat mass or body-fat percentage and concluded that Coleus did not appear to promote weight loss. Studies vary by population, dose, standardization, and design. The responsible synthesis is mixed and limited evidence, not cherry-picking the most favorable biomarker or pretending a non-significant trend is a clinical victory.
Dose matching has limits
An apparent “half the study dose” comparison is useful but not the whole story. Check whether the paper measured the same extract and percentage, whether it took the ingredient once or twice daily, whether a calorie deficit was prescribed, and whether the comparator was placebo. Also examine what changed: waist circumference within both groups is not automatically a between-group benefit. If a paper reports several outcomes, a favorable one cannot be detached from neutral weight and fat-mass findings.
The label’s 25 mg forskolin estimate allows a transparent question, but it does not authorize doubling this multi-ingredient formula to mimic a study. Doing so would also double caffeine, bitter orange, EGCG, and other components, potentially increasing risk. Follow the current product directions and discuss medication or health concerns with a qualified professional. Our ingredient-versus-formula evidence guide explains this transfer problem in more detail.
What a reasonable verdict looks like
The disclosed extract and standardization are more informative than a proprietary blend that hides amounts. They do not by themselves justify a promise of reduced body fat or increased lean mass. A cautious reader could conclude that the ingredient has a plausible biological pathway and a small, inconsistent human evidence base, with no demonstrated incremental benefit from the finished Fat Burn Active formula.
If you are spending money, compare this uncertainty with lower-cost options, including no supplement. A clinician can help weigh the complete label if you use medication or have a health condition. Future independent trials of the actual formula could change the assessment; until then, keep the verdict tied to evidence available now rather than to the appeal of a branded ingredient.
Questions for a study citation
Before using a Coleus study to judge a purchase, record the number randomized and the number who completed the trial. Note whether the analysis compared changes between groups or merely described improvement within the treatment group. Confirm the extract dose and standardization, the intervention duration, and whether participants followed a diet or training plan. Those details decide how far the result can travel to this two-capsule serving.
One favorable insulin marker does not automatically imply a useful effect on appetite or fat mass. Likewise, an absence of a statistically clear difference in a small study is not a definitive proof of zero biological activity. The practical decision depends on the outcome you actually care about and on whether the product delivers that outcome in people like you. At present, a claim of reliably improved body composition from this particular mix is ahead of the human evidence. Keep mechanism, ingredient data, and formula data in separate columns.
A practical comparison also asks whether the claimed benefit is large enough to matter outside a trial. A small shift in a secondary measurement can be statistically interesting yet make no noticeable difference to your daily life. Check the confidence interval and the study's prespecified main outcome when available. With a combination supplement, the burden of proof belongs to the complete recipe and recommended schedule.
If you are considering the product
First read the full Fat Burn Active review and compare the current package with the manufacturer’s online panel. Check the other stimulant sources, your medicines and health conditions, and whether the expected benefit is worth the cost and uncertainty. If the product still fits your decision, you may inspect the current product offer. We may earn a commission from a purchase. That relationship does not change the evidence standard; choosing no supplement is a valid outcome.
Frequently asked questions
Does 250 mg of extract mean 250 mg forskolin?
No. A stated 10% standardization implies about 25 mg forskolin per two capsules.
Did the diet study prove Fat Burn Active causes weight loss?
No. It used a different extract schedule and a reduced-calorie diet, and did not test this finished formula.
Should I double the product to reach a study dose?
No. That would double every other ingredient, including the disclosed caffeine and bitter orange.
Sources
- Fat Burn Active US formula
- NIH ODS: Coleus forskohlii
- Loftus et al., 2015 trial
- Henderson et al., 2005 trial
- FDA: Dietary Supplement Questions and Answers
Ingredient evidence and manufacturer claims were reviewed separately. Educational information only; not medical advice.