Phentaslim Fat Burner

phentaslim reviewedPhentaslim is a fat burner and appetite suppressant that asserts that helps people lose weight through a metabolic rate boost.

It accelerates the rate by which your body turns calories into energy and also achieves fat burning through thermogenesis; by increasing your body inner temperature, you consume more calories than normally.

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As of July, 2015 Phentaslim has been upgraded to the new and improved formula for the maximum power and effectiveness.

Who Stands Behind?

This supplement is created by the company called Optimum Nutra, that’s been established in 2011 to formulate top grade dietary supplements for health and weight loss.

official website optimum nutraWhile the company is comparatively young and hasn’t yet established themselves as a relish in the industry, what seriously make us appeal to them is highest quality of ingredients, pharmaceutical GMP-certified manufacturing process, and transparent customer-friendly business practices.

As we checked their 2 other supplement brands, we found that only scientifically tested components are used, and the formulations are pretty unique compared to other weight loss tablets available today.

How Does It Work?

Phentaslim lists over 12 different compounds and extracts in its ingredient list which target different weight loss aspects, fat burning, appetite suppression, metabolism boost and energy increase. This formula promises to help both men and women lose stubborn fat and control their appetite simply by taking the one capsule twice daily, 20 minutes before breakfast and lunch.


The slimming pills include the following extracts and natural compounds which have been clinically tested for weight loss:

Capsicum Extract (Cayenne) (50 mg) – stimulates thermogenesis which might lead to weight loss, also improves the other ingredients’ absorption

Green Tea Extract (375 mg) – stimulates fat oxidation and thermogenesis

Guarana Seed (100 mg) – energy boosting stimulant, that also helps with appetite suppression

Caffeine (270 mg) – boosts energy, mood and alertness (note that daily caffeine intake from the pills is close to the daily recommended dosage, consuming extra caffeine from drinks may result in overdose and side effects)

L-Tyrosine (200 mg) – helps with sustained energy levels and fights post-workout fatigue

L- Carnitine (200 mg) – increases lean muscle mass and promotes fat oxidation

L-Theanine (225mg) – reduces mental and physical stress, boosts mood and improves cognitive functions

Panax Ginseng (120mg) – boasts of multiple positive effects on health and well-being, including physical stamina and mental endurance, boosting the immune system and helping to stay active and alert.

Black Pepper Extract (6mg) – also known as BioPerine, improves the digestion of all other substances, on it’s own helps to block fat calls formation, and reduces fat levels in the blood.

Niacin (20mg) – aka vitamin B3, used to improve cholesterol levels, and lowering the risks of cardiovascular diseases.

Magnesium (80mg) – helps to prevent high blood pressure and reduce inflammation risks

While all these ingredients have been clinically proven to assist with weight loss each one in its own capacity, the actual dosage of each ingredient seems to be sufficient to promote weight loss.

In addition, it’s a is primarily a stimulant-based weight loss supplement. Guarana seed, Green Tea and Caffeine Anhydrous all seek to increase energy levels and alertness, and 5-HTP1 to induce appetite suppression and improve mood.

Sucess Stories

The official Phentaslim website features successful dieters’ testimonials. However, these read rather generalized and don’t offer much personal information so as to check for credibility.

Phentaslim Factsheet


  • 100% Natural
  • Works for men and women
  • Free international shipping options for purchases of 2 or more bottles
  • Developed in GMP-certified labs
  • 30-day money back guarantee
  • Clinically-tested weight loss ingredients


  • Not suitable for caffeine-sensitive individuals
  • May interfere with prescription medications (requires GP consult)

Safety of Use

Phentaslim uses 100% natural compounds and vitamins so it’s safe to use. By taking Phentaslim you substantially increase your daily caffeine intake. So if you’re caffeine sensitive you might wish to control your total caffeine intake from other sources such as green tea, coffee and power drinks.

Increased heart rate, palpitations, sleep disturbance and other caffeine-related side effects might be experienced if one doesn’t monitor their caffeine intake.

Pregnant, nursing women, people with BMI less than 18.5 and teenagers shouldn’t take Phentaslim. Anyone with a known condition or people on prescription drugs should first consult their physician before purchasing it. Phentaslim contains gelatin so it’s not suitable for vegetarians either.

Verdict – Is Phentaslim Worth Taking?

The supplement is marketed as a fat burner and appetite suppressant, rather it’s a complex natural combination of vitamins, minerals and amino acids to support energy levels, and stimulant-based components to promote calorie expenditure and suppress appetite, which combined, may help you burn excessive fat and lose weight.

With only clinically researched ingredients included in the formula, Phentaslim can be recommended as a great fat loss aid unless you’re sensitive to stimulants like caffeine, or take any prescribed medication.

Where To Buy Phentaslim

Click To Order Direct!The product can be purchased from the official website and comes with a free shipping for 2 and 3-month orders.

A one-month supply bottle comes at $59.95, while the most popular 2-month supply is $99.95.

Each order is backed by unconditional 30-days money-back guarantee.

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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.

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