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.

Click To Order PhentaSlim Direct

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 Phentaslim.com 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.

Click Here To Order Phentaslim Now

Stanley Burnett

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

Click Here to Leave a Comment Below 13 comments
Jessica - December 4, 2014

A couple of months ago I purchased a bottle of Phentaslim. From the website it looked promising. It is FDA approved and all natural ingredients. It looked good to me.
I went ahead and brought 1 bottle to see how it would go.
In total honesty I am not disappointed.
The negatives: Made me feel slightly ill at dinner times. A mild sickly feeling. Nothing too serious. Caused me the odd headache here and there. Again nothing major.
Positives: Ate less. Surpressed appetite quite well. Had slightly more energy. No bad after taste and as far as I’m aware no serious problems health wise.
After the month (and I was quite surprised) I could fit into size 10 bottoms and size 8 tops just about. I had definitely lost weight without a doubt. Not sure how it happened but it happened.
I’m not claiming that Phentaslim is a “miracle cure” for fat loss, but I am saying that its effective. I would definitely recommend it. I cannot compare it to other diet pills because it is the only one I have taken. I will advise that before anyone buys diet pills that they research it first and make sutlre it is FDA approved. You know it is more likely to be safe that way.

    Stanley Burnett - December 5, 2014

    Hi Jessica!

    Thanks for your feedback! In fact, Phentaslim is a dietary supplement and supplements don’t require FDA approvals as they’re not medicines and don’t require prescription. Some supplements are aimed at causing the same effects as the prescription drug like Phentermine, but the last one is banned by FDA now due to side effects that might case some health damage.

    Phentaslim is acting in somewhat similar manner as Phentermine (appetite suppressing) but without side effects. But again, safety is important and slimming supplements are most useful as a boost of own weight loss efforts. And some of them may have side effects in some individuals anyway. Glad that you liked this product, made us more confident in recommending it over other less safe diet pills.


    Slimmingpillsinfo team

Katina Lowe - May 11, 2016

My first batch arrives today!
I have approx 2 stone to lose but also want to build lean muscle so im looking more at inches than scale weight.
I follow a strict ketogenic diet and train daily so hopefully this will give me a boost. I soend a lot of money in supplements trying to find the most effective so will be able to compare.
Will keep you updated!

    emily williams - July 11, 2016

    Any update? Just started my bottle this and I am feeling a bit jittery after just one day.. just wondering if it was worth powering through with them.

    Nicola parry - July 23, 2016

    Hi . Read that you purchased weight loss pills back in may. Can you tell me honestly how you got on?

    Rashi Modgill - February 16, 2017

    Hi so what are ur reviews ..have u lost any weight

Deano - July 8, 2016

Lost 4 lbs 5 days in… Pooing like crazy, so much more energy and for some reason I feel better about myself and I’m eating a lot less without realising

Sharon Anderson - August 2, 2016

First day on these I felt fine. Second day at lunchtime, I felt very nauseous. Third day after breakfast, I vomitted. Not sure whether to continue taking these, but have already lost weight.

    Edith Warren - October 4, 2016

    Make sure you drink plenty of water and my trick to stop nausea is to have a glass of water with squeezed lime on it. Every diet pill give mild head ache and nausea you just have to find way to control it.

    Teresa Clarke - October 5, 2016

    Any update on this post? I’m on day 1. I wonder what to expect.

Angela Newton - March 12, 2017

After read the above comments I am not sure if I can buy Phentaslim as they do not really explain how long it took them to loose weight a, and if the side effects continued also if they maintained the the weight. More information is needed.

Jo - March 21, 2018

Am on AD, can you take this with these?

    Stanley Burnett - August 16, 2018

    Hello Jo!

    Should be no issues with AD, unless you have some personal intolerance of some Phentaslim ingredients. It’s hard to say unless you try it and see how it works for you.


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