Isatori Lean System 7

iSatori Leansystem 7

Lean System 7 is a thermogenic fat burner developed by top-selling manufacturer iSatori.

As an industry-leader, iSatori develops a wide range of supplements that target anything from weight loss to endurance and recovery.

Lean System 7 is a popular weight loss product which thanks to its handpicked ingredients achieves weight loss through fat burning.

Isatori is no longer available since DHEA ingredient is now considered as “doping”

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The unique proposal by Lean System 7 is that it achieves weight loss by making your metabolism work efficiently around the clock.

Rather than offering short bursts of metabolic spike, Lean System 7 is according to iSatori, an advanced metabolic activator.

LeanSystem approaches weight loss different than most fat burners. Through thermogenic ingredients such Green Tea and Bitter Aurantium it ensures your metabolic rate is increased for sustained periods of time.

This up-regulation of your metabolism is what results in efficient weight loss.

The carefully assembled and studied formula of Lean System 7, ensures that one’s weight loss efforts have a strong ally.


Lean System 7 contains the following ingredients that together work on boosting your metabolism either through thermogenesis, energy boost, or by enhancing the other ingredients’ efficiency.

  1. Yerba Mate – a natural stimulant and antioxidant powerhouse that boost the metabolism
  2. Guarana – natural stimulant that targets energy and alertness
  3. Green Tea – has rich antioxidant activity and is weight loss promoter
  4. Bitter Aurantium– a fat burning compound
  5. Dandelion  – insufficient evidence for weight loss properties, a diuretic
  6. Bioperine – a compound that improves other nutrients’ absorption
  7. 7- Keto – a non-hormonal DHEA derivative that increases the set-point of metabolic rate.

Does it work?

According to iSatori, the company has sold more than 1 million Lean System 7 bottles since 2002. The key ingredient for Lean System 7’s fat burning capacity is 7-Keto, a dehydroepiandrosterone (DHEA) derivative our bodies naturally produce.

As of 2020, DHEA is considered as potentially dangerous (equal to the doping) and it’s not recommended as a safe supplement.

7-Keto is said to be a thermogenic, it achieves a metabolism boost by increasing your body’s temperature and the rate by which it burns calories.

While our bodies naturally produce 7-keto, as we grow old 7-keto levels drop, resulting in a sluggish metabolism and possible weight gain (think of how easily pounds pile up now in contrast to when you were a child or teenager!)

7-Keto targets the thyroid gland causing it to increase your basal metabolic rate (BMR). As a result, your body burns more calories each day, since its typical energy expenditure increases.

FactSheet On LeanSystem 7


  • Trusted manufacturer, iSatori
  • Clinically proven formula
  • Improves metabolic rate
  • US developed


  • Too many ingredients, raising suspicion over each ingredient’s isolated quality
  • No longer sold on iSatori’s own eshop
  • Recurrent side effect reports by frustrated consumers
  • Lack of evidence about long-term efficiency/safety
  • Works only with exercising and dieting. It’s role is supportive.

Side Effects – Safety of Use

Lean System 7 has been reported by many reviewers to cause a range of side effects including,

  • Dizziness
  • Jitters
  • Shortness of breath
  • Heart palpitations
  • Sweating
  • Sleep issues provides a list of conditions and side effects that prohibit the use of Lean System 7.

So, apart from pregnant, nursing women, teenagers and those taking caffeine from other sources, the supplement cannot be taken if one also takes,

“MAOI inhibitors, antidepressants, aspirin, nonsteroidal anti-inflammatory drugs, or products containing phenylephrine, ephedrine, pseudoephedrine, or other stimulants. Consult your physician prior to use if you have a medical condition, including, but not limited to, heart, liver, kidney, or thyroid disease, psychiatric or epileptic disorders, difficulty urinating, diabetes, high blood pressure, cardiac arrhythmia, recurrent headaches, enlarged prostate, or glaucoma. Discontinue 2 weeks prior to surgery or if you experience rapid heartbeat, dizziness, severe headache, or shortness of breath.”

Product vendors offer it at the price of $25.85 for a bottle of 120 capsules and 60 servings.

Verdict – Is Lean System 7 Worth Using?

Despite a promising formula, that’s also clinically tested, Lean System 7 is plagued by things such as scarcity of positive user reviews, a series of side effects associated with its use and no proof of its long term safety and/or efficiency.


As an alternative, we suggest you consider Phentaslim, a safe weight loss supplement that’s been on the market for many years and has been constantly receiving praise by consumers especially for speeding up the fat burning process with no adverse reactions.

Click To Read Full Phentaslim Review

Stanley Burnett
Stanley Burnett
My goal on this website is to provide you with unbiased reviews of slimming supplements in the UK market today, and give recommendations based on years of experience in fitness, health and supplements industry. I'm a supplements nerd, fitness junkie with over 10 years of experience in the field of fat loss, muscle building and overall healthy lifestyle. Click to read more about me.