Best for: a caffeine-free fat burnerNo caffeine2 capsules a day
CalmLean Review — Ingredients, Evidence & Verdict
Written by the WellnessChecked Editorial Team. We checked the formula, the guarantee terms and the published research on its ingredients.
✍️ WellnessChecked Editorial Team✅ Sources listed on this page
Caffeine-free fat burner
Best for
Ingredient studies only
Evidence
67-Day
Guarantee
Scroll down to read our full analysis, including ingredient breakdown, pros & cons, and where to buy safely ↓
📋 Editorial & Affiliate Disclosure: This review was written by the WellnessChecked editorial team. We only cover products from brands we have affiliate relationships with, so our top picks are the best of the products we cover, not of every product on the market. We earn a commission if you purchase through our links — paid by the manufacturer at no extra cost to you. We aim to describe every product accurately, including its limits. Read about our methodology → | Full disclaimer →
⚡ Quick AnswerLast Reviewed: October 2026
✅ Updated October 2026: label, guarantee terms and evidence rechecked
CalmLean is a caffeine-free fat burner from PrimeGENIX: it contains no caffeine or synephrine, but it does contain cayenne pepper extract, a mild thermogenic. Its main ingredient, ForsLean forskolin, has small 12-week trials with mixed results: one in 30 overweight men found lower body fat versus placebo (weight didn't change), and a similar trial in women found no significant change. CalmLean itself has never been tested. It comes with a 67-day money-back guarantee.
📚 Key reference: A 12-week trial in mildly overweight women (Henderson et al., 2005) found no significant change in body fat or weight with forskolin. Henderson et al., 2005, JISSN
🇺🇸Ships to USA
✅cGMP manufacturing (per the maker)
🔬Ingredient research referenced; see sources
📰 The Research Behind It
No trial of CalmLean itself has been published. ForsLean has two small 12-week trials: in 30 overweight or obese men (Godard et al., 2005), body fat percentage fell versus placebo but body weight did not change; in a supplier-funded trial in mildly overweight women (Henderson et al., 2005), there was no significant change in body fat or weight.
CalmLean may suit someone who wants a caffeine-free weight-loss supplement and accepts modest odds of a small effect. Its main ingredient, forskolin, has only small 12-week trials with mixed results, and the product itself has never been tested.
In this review we go through what's in CalmLean, what the forskolin trials actually found, the side effects and interactions, and the guarantee terms. Read the full analysis below before making a decision.
CalmLean at a Glance
Ingredients
ForsLean forskolin, cayenne, chromium polynicotinate and BioPerine. Reported doses not confirmed on the official label.
Evidence
No trial of the product. Forskolin has small 12-week trials with mixed results; chromium and cayenne effects are small.
Transparency
Ingredients named by the company; doses only from a third-party review. Guarantee terms not confirmed on the official site.
Safety
Caffeine-free, but forskolin may lower blood pressure and chromium can lower blood sugar.
Value
Price not confirmed on the official site; a third-party review reports a subscription option at about $49 a month.
We compare products on ingredients and doses, published evidence, transparency and guarantee terms, safety and value. How we review →
What Is CalmLean?
CalmLean is a caffeine-free weight-loss supplement from PrimeGENIX, a brand of Leading Edge Health. Company materials list ForsLean (Coleus forskohlii root extract), cayenne (Capsicum annuum), chromium polynicotinate and BioPerine, taken as 2 capsules a day (60 capsules per bottle). A third-party review reports the label as ForsLean 500 mg (10% forskolin), cayenne 100 mg, chromium 200 mcg and BioPerine 5 mg per serving; we couldn't view the official label to confirm. No caffeine is listed.
*Dietary supplement. Not intended to diagnose, treat, cure or prevent any disease. Statements not evaluated by the FDA.
Active Ingredients — Full Scientific Breakdown
The doses below are as reported by a third-party review; we couldn't confirm them on the official label. What each listed ingredient is and what human studies have looked at:
The reported dose matches the trials. One 12-week trial in 30 overweight men found lower body fat versus placebo (weight did not change); a similar trial in women found no significant change in body composition.
Chromium may modestly affect blood sugar control; weight-loss effects in trials are small at best. It can lower blood sugar, so take care with diabetes medicines.
A mild thermogenic. Its effect on calorie burn is small, and it can upset the stomach.
BioPerine (reported 5 mg)Absorption
BioPerine has improved absorption of some nutrients in supplier-funded studies; it has not been tested with forskolin or chromium.
📋 Our Editorial Concerns
In the interest of balance, here are the limitations of CalmLean that we think buyers should know:
→No trial of CalmLean itself; ingredient trials ran 12 weeks
→Forskolin evidence is small and mixed; body weight did not change even in the positive trial
→Priced above many similar products; the price is not matched by stronger evidence
→Doses and guarantee terms couldn't be confirmed on the official site
Results Timeline: What to Expect
What the ingredient trials measured, and what isn't known. Individual results vary:
1
Weeks 1–4: Early Days
Some people report fewer cravings, but trials of chromium show little effect in people without diabetes. There's no reliable data on early effects.
2
Week 12: When the Trials Measured Results
The forskolin trials ran 12 weeks; any effect on body fat was modest and weight did not change. Expect modest results at best; diet and activity matter far more than the supplement.
⚠️ Important: Results vary. There is no trial of CalmLean, so these points describe ingredient studies, not a promise. The 67-day money-back guarantee has conditions (see below).
🔬 What the Evidence Actually Shows
Trial of the product itself: None published.
Ingredients: ForsLean: in 30 overweight men over 12 weeks, body fat fell versus placebo but weight didn't change; a supplier-funded 12-week trial in women found no significant change. Chromium has produced, at most, small extra weight loss in meta-analyses, and cayenne's effect on calorie burn is small.
Doses on the label: Reported by a third party as ForsLean 500 mg, cayenne 100 mg, chromium 200 mcg and BioPerine 5 mg per 2-capsule serving; not confirmed on the official label.
Guarantee: 67 days; refund minus shipping, you pay return shipping and must contact the company first. Sources differ on whether opened bottles are refundable.
✓Reported ForsLean dose matches the amount used in trials
✓Short, simple four-ingredient formula
✓67-day money-back guarantee
✗ Considerations
✗No trial of CalmLean itself
✗Forskolin evidence is small and mixed; body weight did not change even in the positive trial
✗Doses not confirmed on the official label we could access
✗Forskolin may lower blood pressure and interact with some medicines
⚠️ Who Should NOT Take CalmLean
✗Anyone under 18 years of age
✗Anyone pregnant or breastfeeding
✗Anyone taking blood pressure, blood-thinning or diabetes medicines without their doctor's approval
✗Anyone with kidney or liver disease (chromium), unless a doctor says it's OK
✗Anyone looking for an immediate or guaranteed result
This list isn't complete. Check with a doctor or pharmacist before taking any supplement.
Is CalmLean Safe?
CalmLean contains no caffeine and was usually well tolerated in ingredient trials, but its ingredients can interact with blood pressure, blood-thinning and diabetes medicines, so check with your doctor if you take any of them.
✓ Usually Well Tolerated
Small ingredient trials reported few side effects. Forskolin can lower blood pressure and raise heart rate, and cayenne and forskolin can cause stomach upset, heartburn or loose stools.
⚠️ Consult Your Doctor If:
● You take blood pressure or heart medicines
● You take blood thinners
● You take insulin or diabetes medicines, or have kidney or liver disease
● You are pregnant or breastfeeding
Where to Buy CalmLean Safely
We suggest buying from the official website, so you can:
✓ Qualify for the 67-day money-back guarantee (it only covers orders from the official site)
✓ Check the current label and doses
✓ See the terms of any subscription option before choosing it
*Individual results vary. Not intended to diagnose, treat, cure or prevent any disease. These statements have not been evaluated by the FDA. Full disclaimer →
🛡️ Final Verdict: CalmLean
CalmLean may suit someone who wants a caffeine-free weight-loss supplement and accepts modest odds of a small effect. Its main ingredient, forskolin, has only small 12-week trials with mixed results, and the product itself has never been tested.
Best for: someone who wants a caffeine-free weight-loss supplement and accepts modest odds of a small effect.
Not for: anyone expecting meaningful weight loss from a pill, or anyone on blood pressure, blood-thinning or diabetes medicines without a doctor's OK.
*These statements have not been evaluated by the FDA. Not intended to diagnose, treat, cure or prevent any disease. Individual results may vary. Full disclaimer →
Caffeine-based fat burners can cause a raised heart rate, jitters and poor sleep. Caffeine-free products avoid caffeine side effects, but people with heart conditions should still check ingredients like forskolin with their doctor, since it can lower blood pressure.
It's caffeine-free and its ingredients were usually well tolerated in trials. Forskolin may lower blood pressure and add to the effect of blood thinners, and chromium can lower blood sugar, so check with your doctor if you take blood pressure, blood-thinning or diabetes medicine.
There's no trial of CalmLean. In the forskolin trials, body weight did not change over 12 weeks, though one trial in men found lower body fat. Expect modest results at best; diet and activity matter far more.
From the official website, where the 67-day guarantee applies: refund minus shipping, you pay return shipping and must contact the company first. Sources differ on whether opened bottles are refundable, so check before ordering.
Anyone pregnant or breastfeeding, anyone under 18, and anyone on blood pressure, blood-thinning or diabetes medicines without their doctor's approval.
Also Consider
Other supplements in Men's Health you may want to compare:
Please note: This content is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting any supplement. Individual results vary. *Not evaluated by the FDA. Not intended to diagnose, treat, cure or prevent any disease.
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