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A non-prescription, stim-free weight-management supplement combining forskolin, white kidney bean, and 5-HTP to support appetite and a calorie-controlled diet.
A clean, honest stimulant-free helper, not a magic pill
If you want metabolic and appetite support without caffeine jitters, Transparent Labs Fat Burner Stim-Free is one of the more credible options: a fully disclosed label, doses in line with the human research, and third-party testing. But the underlying ingredient evidence shows small effects, so it only pays off layered on top of a real diet, adequate protein, and a training plan, not on its own.
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Transparent Labs is a Utah-based supplement company that built its brand on open labeling — disclosing the exact dose of every active ingredient rather than hiding amounts inside "proprietary blends." The Stim-Free Fat Burner (current packaging: *Body Recomp – Stim-Free Fat Burner*) is the caffeine-free version of its weight-management line, aimed at people who want an appetite- and metabolism-support supplement without the jitters, sleep disruption, or tolerance issues that come with stimulant fat burners.
It is sold as a 120-capsule bottle providing 60 servings of 2 capsules each. The label discloses four standardized actives per 2-capsule serving:
Two framing facts matter up front. First, like all dietary supplements in the U.S., this product is regulated under the Dietary Supplement Health and Education Act (DSHEA): it is not FDA-approved for weight loss, and the manufacturer — not the FDA — is responsible for substantiating safety and any structure/function claims before sale (FDA). The FDA does not review supplements for efficacy before they reach the market. Second, Transparent Labs publishes third-party certificates of analysis and carries Informed Choice/Informed Sport-style certification on parts of its line — meaningful quality signals that distinguish it from the many fat burners that publish nothing. Quality testing tells you the bottle contains what the label says; it does not tell you the formula works.
A stimulant fat burner leans on caffeine and similar compounds to raise heart rate and energy expenditure. This product deliberately removes that lever and instead stacks four ingredients that act through different, gentler mechanisms:
The honest summary of the mechanism is this: these are real, plausible biological pathways, but each produces a *small* effect. None is a drug-strength metabolic switch. The product is designed to provide a modest tailwind on top of a calorie deficit — not to cause weight loss on its own.
Green tea catechins are the most-studied ingredient here, but the evidence is also the most sobering. The landmark Cochrane systematic review (Jurgens et al., 2012; PMID 23235664) pooled randomized trials of green tea preparations for weight loss in overweight and obese adults and concluded the amount of weight loss was small and not likely to be clinically important — with green tea also having no significant effect on weight maintenance. A separate systematic review and meta-analysis found that catechin-plus-caffeine mixtures produced reductions in body weight, BMI, and waist circumference, but that green tea catechins administered without caffeine showed no benefit on any measure, and that even the combination's clinical significance was "modest at best" (Phung et al., Am J Clin Nutr 2010; PMID 19906797).
A crucial nuance for *this* product: much of the metabolic benefit in the literature comes from catechin–caffeine combinations, where caffeine appears to do meaningful work. By design, this is a caffeine-free formula, so the green tea component is operating without its usual partner — which likely makes its real-world contribution smaller than the catechin literature headline suggests. The dose (~150 mg EGCG/serving, ~300 mg/day at full dosing) is reasonable and well below thresholds associated with liver-safety concerns, but expectations should be tempered.
The dose here — 250 mg of a 10%-forskolin extract — matches the most-cited human trial almost exactly. In a 12-week randomized, double-blind, placebo-controlled study of overweight/obese men, 250 mg of 10% forskolin extract twice daily significantly reduced body-fat percentage and fat mass (by DXA) and raised free testosterone versus placebo (Godard et al., Obesity Research 2005; PMID 16129715). That is a genuinely supportive result and explains why this ingredient is in the formula.
However, the caveats are substantial. That trial was small (about 30 men), the body-weight change itself was not significant (the effect was on composition, not the scale), and a companion trial in overweight women found forskolin did not promote weight loss and instead appeared to help prevent weight gain (Henderson et al., PMC2129145). The NIH Office of Dietary Supplements summarizes the field bluntly: forskolin has been studied in only a few short, small trials, with no clear effect on body weight and limited safety data (NIH ODS). So the evidence is suggestive for body-composition support in some populations, not established for weight loss.
Capsimax is a beadlet-encapsulated, concentrated capsicum extract designed to deliver capsaicinoids without the gastric burn of raw cayenne. The mechanistic evidence is reasonably consistent: capsaicinoids modestly increase energy expenditure and fat oxidation and can reduce energy intake. A meta-analysis of energy-intake data found capsaicinoid ingestion before a meal reduced subsequent ad libitum intake by roughly 74 kcal, and suggested a minimum of ~2 mg of capsaicinoids is needed for that appetite effect (Whiting et al., Appetite 2014; PMID 24246368). A separate 12-week trial with a post-hoc, covariate-adjusted analysis reported reductions in percent body fat and fat mass — but those reductions reached significance only in the 4 mg capsaicinoid group, with the 2 mg group showing no significant effect versus placebo (Rogers et al., PMC6088424). That dose nuance matters here: Capsimax delivers roughly 2% capsaicinoids, so a 50 mg dose provides only about 1 mg of capsaicinoids — below the ~2 mg appetite threshold and well under the 4 mg body-composition dose. The effects are, at best, real but small — on the order of tens of calories per day in energy expenditure — and accrue meaningfully only over months.
Paradoxine is the most novel ingredient and the most interesting. Grains of paradise contains 6-paradol and related compounds that may activate brown adipose tissue (BAT), which burns energy to produce heat. In a placebo-controlled study of 19 healthy young men, a single 40 mg dose of grains-of-paradise extract increased whole-body energy expenditure over the following two hours, with the effect concentrated in the subset who were "BAT-positive" and absent in those who were "BAT-negative" (Sugita et al., British Journal of Nutrition 2013; PMID 23308394). This is a small, acute, single-dose study in lean young male volunteers — encouraging proof-of-mechanism, but a long way from demonstrating clinically important fat loss in the overweight adults most likely to buy a fat burner.
The most defensible read of the evidence: each ingredient has a small, real metabolic effect, but there is no published clinical trial of this specific four-ingredient stack proving meaningful weight loss. What the literature supports is a modest, additive nudge — slightly increased energy expenditure, slightly reduced appetite, slightly improved fat oxidation — that can help *only in the context of a calorie deficit and consistent training.*
It is essential to be clear about magnitude. The energy-expenditure effects measured for capsaicinoids and grains of paradise are typically in the range of tens of calories per day. Green tea's weight effect was non-significant in the Cochrane review without caffeine. Forskolin's strongest result was on body composition, not body weight, in a single small male cohort. Stacking modest effects can produce a modest combined effect — but anyone expecting visible fat loss from the capsules alone, without changing diet or activity, will almost certainly be disappointed. As an evidence-based assessment: this is a reasonable *adjunct*, not a primary weight-loss tool.
Reasonable candidates:
Who should skip it:
This is a relatively gentle formula because it omits stimulants, so it avoids the jitteriness, palpitations, and insomnia common to caffeine-heavy burners. The most likely complaints are gastrointestinal: green tea extract and concentrated pepper extracts can cause nausea, stomach upset, reflux, or a warming sensation, especially on an empty stomach — which is why the label advises taking it before meals with a full glass of water.
Ingredient-specific cautions worth flagging:
Because supplements aren't pre-approved by the FDA, and because real interactions exist, the prudent step is a conversation with a pharmacist or physician before starting — particularly if you take any prescription drug.
The label directs 2 capsules with 8–10 oz of water, twice daily, 30–60 minutes before meals (4 capsules/day total). New users are advised to start with 1 capsule twice daily for the first three days to assess tolerance before titrating up. Do not exceed 4 capsules in a day or 2 within a 4-hour window, and avoid dosing within ~3 hours of bedtime. Pre-meal timing is not arbitrary: the appetite and thermogenic effects are most relevant around eating, so consistent pre-meal dosing matters more than with many supplements. At the full dose, one 120-capsule bottle lasts 30 days.
At roughly $49 for 60 servings (about $0.82/serving), the full 4-capsule daily dose runs around $1.63/day, or ~$49/month, with a small subscribe-and-save discount. That is mid-to-premium pricing for the category. You are paying partly for clinically aligned doses (the forskolin and green tea amounts genuinely match studied doses) and partly for the transparency and third-party testing — real advantages over cheaper, blend-hiding competitors. The value judgment is honest but unglamorous: you are buying a well-made, well-dosed version of ingredients whose evidence supports only small effects. If you will not also control diet and training, it is poor value at any price.
Transparent Labs Fat Burner Stim-Free is, by the standards of its category, an honest product: fully disclosed doses, several ingredients used at amounts that match the published studies, third-party testing, and no stimulants to disrupt sleep or spike blood pressure. Those are genuine strengths. But transparency is not the same as effectiveness. The science behind its four ingredients supports only small, additive, diet-dependent effects — the Cochrane review found green tea's weight effect small and not clinically important (and meta-analysis found no benefit from catechins without caffeine), forskolin's best result was on body composition rather than the scale in one small male trial, the capsaicinoid dose here sits below the amounts that moved body composition in trials, and the grains-of-paradise effect comes from a single acute study in lean men. It is a defensible optional adjunct for someone already doing the hard work of a calorie deficit and consistent training who wants a caffeine-free edge and values clean labeling. It is not a weight-loss solution on its own, and anyone with clinically significant weight to lose is better served by evidence-based lifestyle change and, where appropriate, medically supervised prescription therapy.
It combines four plant-derived compounds that may nudge metabolism and appetite without stimulants. Green tea catechins (EGCG) and Capsimax (capsaicin) have been shown to modestly raise energy expenditure and fat oxidation; Paradoxine (grains of paradise, standardized to 6-paradol) is thought to activate brown adipose tissue to burn calories as heat; ForsLean (Coleus forskohlii, standardized to forskolin) raises cyclic AMP, which is linked to fat mobilization. Capsaicin and grains of paradise may also blunt appetite, which can make a calorie deficit easier to maintain. The formula contains no caffeine or other stimulants.
No trial tests this exact blend, so evidence comes from each ingredient and several of the studies are small. A 2005 Obesity Research study (Godard et al.) found 250 mg of 10% forskolin twice daily for 12 weeks significantly reduced body fat percentage and fat mass in 15 overweight and obese men, though total body weight did not differ from placebo. A 2014 trial in the Journal of Nutritional Science and Vitaminology found 30 mg/day of grains of paradise extract increased whole-body energy expenditure and reduced visceral fat versus placebo in a small group of women. Capsaicin and green tea catechins have been shown to modestly raise energy expenditure and fat oxidation, but a 2010 American Journal of Clinical Nutrition meta-analysis put green tea's weight effect at roughly 1 kg or less, which the authors call clinically modest at best. Net: real but small, deficit-dependent effects.
A realistic timeline of what Transparent Labs Fat Burner Stim-Free users typically experience. Individual results vary; this is educational, not medical advice.
You start low to assess tolerance: 1 capsule twice daily, taken with 8-10 oz water about 30-60 minutes before meals, avoiding use within 3 hours of bedtime. Because it is stimulant-free, expect no jolt of energy or dramatic appetite drop yet -- this phase is about confirming the capsules sit well with you.
You ramp to the full 4 capsules per day (2 capsules, twice daily, not exceeding 2 in any 4-hour window). Many users begin noticing modest appetite control and a feeling of metabolic support, but the fat burner does nothing on its own -- any benefit depends on pairing it with a calorie deficit and exercise.
With consistent dosing plus a controlled-calorie diet, subtle changes may start to appear, but most people do not 'see' meaningful fat loss until around the 3-4 week mark. Results vary widely by diet, activity, and individual response; this is a supportive aid, not a magic pill.
This is where realistic, measurable progress tends to show -- typically a modest few pounds of fat loss per month when a deficit is maintained, with the formula intended to help preserve lean muscle. Track changes by photos, measurements, and the scale rather than expecting rapid drops.
The brand recommends using it consistently for 8-12 weeks for optimal results. By the end of this window you should be able to judge whether it added value alongside your diet and training. Weight-loss plateaus are normal as your body adapts, so reassess calories and activity rather than expecting the supplement to override them.
Because it has no stimulants, most users report no jitters, anxiety, or sleep disruption. The most common complaint is mild gastrointestinal upset, nausea, warmth, or a "hot" sensation from the Capsimax and Paradoxine pepper extracts, especially on an empty stomach; taking the capsules with food and water tends to reduce this. Rare but more serious concerns relate to the ingredients themselves: high-dose green tea extract has been associated with uncommon, idiosyncratic cases of liver injury (documented in the NIH LiverTox database), and forskolin can lower blood pressure and may interact with anticoagulants and antihypertensives. Stop use and seek medical care if you notice yellowing skin or eyes, dark urine, severe abdominal pain, or signs of very low blood pressure such as dizziness or fainting.
Starts at $69 from Transparent Labs.
As of 2026, Transparent Labs lists this product at about $54.99, often discounted to around $49.99, for a 120-capsule bottle that delivers 60 servings, or roughly a 30-day supply at the full 4-capsule daily dose. That works out to about $0.83-$0.92 per 2-capsule serving, or roughly $1.65-$1.83 per day. Third-party retailers sometimes price it lower (around $45) or higher. Subscribe-and-save and periodic sitewide promo codes can trim the price further. As a dietary supplement it is paid out of pocket and is generally not covered by insurance, and typically not HSA/FSA eligible without a documented medical need. It is occasionally out of stock or branded as "Body Recomp," so verify you are buying the stim-free version.
Prices current as of May 29, 2026 and exclude promo codes; cash-pay and channel pricing change frequently — confirm with the pharmacy or provider.
Transparent Labs Fat Burner Stim-Free is among the more honest, well-labeled stimulant-free thermogenics on the market, with disclosed branded doses and third-party testing. The catch is that the supporting research shows small, deficit-dependent effects. Buy it as a marginal aid layered on diet and training, and skip it if you expect capsules to do the work.
It works modestly and only as a supporting tool. Its individual ingredients have human studies showing small increases in energy expenditure, fat oxidation, and appetite control, but no fat burner replaces a calorie deficit. There is no trial on this exact blend, so expect a marginal edge while you diet and train, not dramatic weight loss on its own.
For most healthy adults it is generally considered safe when used as directed, with mild nausea or stomach warmth being the main reported issue. Caution applies if you have liver disease, take blood pressure, blood thinner, or diabetes medications, or are pregnant or breastfeeding. High-dose green tea extract carries rare liver-injury reports and forskolin can lower blood pressure, so this is general information, not medical advice; consult your doctor first.
The stim-free version (Body Recomp) contains no caffeine or stimulants and relies on green tea extract, ForsLean, Capsimax, and Paradoxine. The standard PhysiqueSeries version adds caffeine and other stimulants for energy and stronger appetite suppression, which can also cause jitters, faster heart rate, and sleep disruption in sensitive users.
Take 2 capsules with 8-10 oz of water twice daily, 30-60 minutes before meals, for 4 capsules total per day. Beginners should start with 1 capsule twice daily for the first three days to assess tolerance, then move up to the full dose. Do not exceed the labeled dose.
As of 2026 it lists around $54.99, often discounted to about $49.99, for a 120-capsule bottle. That bottle holds 60 servings (about a 30-day supply at the full 4-capsule daily dose), or roughly $0.83-$0.92 per serving and about $1.65-$1.83 per day. As a supplement, it is generally not covered by insurance or typically HSA/FSA.
No. Because it is completely caffeine- and stimulant-free, it should not cause jitters, racing heart, or sleep disruption for most people. That makes it suitable for evening dosing or for people who already take a stimulant pre-workout earlier in the day.
The most common side effect is mild gastrointestinal upset, nausea, or a warm sensation from the pepper-based Capsimax and Paradoxine, especially on an empty stomach; taking it with food helps. Rarely, high-dose green tea extract has been linked to liver injury, and forskolin can lower blood pressure. Stop use and seek care for yellowing skin, dark urine, or severe abdominal pain.
Talk to your doctor first. Forskolin can lower blood pressure and may interact with antihypertensives and blood thinners such as warfarin, and green tea extract can affect some medications. It is not recommended alongside these medications without medical guidance.
Appetite control may feel different within the first week or two, but any visible body-composition change takes several weeks of consistent use while maintaining a calorie deficit. Results depend far more on diet, protein, sleep, and resistance training than on the supplement itself.
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