FREE DELIVERY On UK Orders over £39


Burn Calories. Increase Energy. Get Results.

Burn Calories

Advanced Thermogenic Formula to Ignite Your Metabolism

Boost Energy

Fight the Fatigue of dieting and Stay On Track

Assist Wellbeing

Packed with Essential Vitamins, Minerals, and Powerful Antioxidants

Join the thousands who are Winning With Phentaslim

We get it.

Losing weight is tough.

Just thinking about tackling those excess pounds is enough to make us want to give up before we start.

So, we created Phentaslim.

Phentaslim uses natural ingredients to provide you with all you need to fire up your metabolism and boost your energy to target stored body fat.

It’s the Kick Start you’re looking for.


Phentaslim in 3 Steps

Phentaslim isn’t a fad diet or weight-loss miracle – we like to keep things real.

Phentaslim contains clinically-proven ingredients and the essential vitamins and minerals needed to make losing weight faster and achievable.

You can’t trick real life: poor dietary choices are responsible weight gain. Exercise and an improved diet are essential for generating and maintaining weight loss.

These facts cannot be avoided or ignored – but they can be utilised.


You’re Ready

You’ve had enough of putting in the hard work with disappointing results – it’s no wonder many simply give up after a week.

Phentaslim helps increase your metabolism to get things moving.


Burn Fat for Energy

A raised metabolism uses more energy. The best part? You already have an energy source ready to be utilised.

Phentaslim works to release energy from body fat.


Lasting Changes

As you progress, you’ll find it so much easier to eliminate those bad habits that have been holding you back.

Phentaslim can assist with weight loss that lasts.

Phentaslim combats common dieting problems

Dieting means change, and we understand it’s rarely as simple as going from A to B.

Phentaslim can help steer you around these common weight loss road blocks:



Phentaslim’s energy-boosting base helps you avoid those low-energy slumps you get with dieting.



Phentaslim’s mood-boosters help to keep you motivated, ready to burn those excess calories.



Phentaslim can help you skip past those between-meal cravings – and to switch out those sugary carbs for filling proteins.

Made With You in Mind

We’ve made using Phentaslim as simple as is possible.

Simply take the easy-to-swallow capsule, three times a day with water. That’s it.

Phentaslim is made using premium quality ingredients in the United Kingdom and United States, in manufacturing facilities that are fully inspected and certified.

Even better, there are no set rules, no strict diets to follow––use it before eating, use it before exercising, the choice is yours. It’s made to fit into your daily routine and can be used alongside existing weight loss plans.

We want you to focus on feeling incredible.
Take Control With Phentaslim.

Vegetarian & Vegan
Natural Ingredients
60 Days Returns


I’m finally getting rid of my ‘lazy man’ body. Plus, I have so much more energy now, it makes exercising a pleasure. This is the best I’ve felt and looked in years.


Jake Muldoon, 38
Atlanta, GA, USA.


Phentaslim Uncovered

Containing no chemicals and no restricted substances, Phentaslim is nature’s answer to powering up your routine.

We believe you should know exactly what’s in your supplements.We don’t hide behind secret formulas or made-up names for everyday ingredients. We have nothing to hide.

Here’s everything you need to know about what’s in Phentaslim. 

How To Use Phentaslim

Directions: Take ONE capsule spaced evenly, three times per day. Take each capsule with a full glass of water. Allow around four hours between taking each capsule.

Advice: Do not exceed the recommended dose. If you miss taking a capsule, leave it out and do not double-up the next dose. Persons sensitive to caffeine should use a lower dose (eg. one capsule per day) to assess their tolerance. It is advised to avoid using this product late in the day to avoid disruption to sleep. This product is suitable for vegetarians and vegans.

Warning: This product contains caffeine and is not suitable for children or pregnant or breastfeeding women. For use only by persons over the age of 18.

Ingredients: Capsule Shell (HPMC), Caffeine Anhydrous, L-Theanine, N-Acetyl L-Carnitine, L-Tyrosine, Magnesium Oxide 60% DC, Guarana Extract 4:1, Magnesium Stearate, Brown Rice Flour, Korean Panax Ginseng 40:1 (80% Ginsenocides), Green Tea Extract 15:1 (95% Polyphenols), Nicotinamide (Niacin), Zinc Oxide, Cayenne Powder (Capsicum Frutescens) 8:1 Extract 0.5%, Silicon Dioxide (Sipernat 22s), Ginkgo Leaf Extract 50:1, Pyridoxine HCL 82%, Thiamine HCL 89%, Riboflavin, Black Pepper Extract (Piper Nigrum) 95% Piperine, Cyanocobalamin.

Phentaslim Nutritional Information

Ingredient Amount Per Serving % NRV
Korean Panax Ginseng (40:1) 1,200mg
Guarana Extract (4:1) 400mg
Green Tea (15:1) 375mg
Caffeine Anhydrous 270mg
L-Theanine 225mg
N-Acetyl L-Carnitine 200mg
L-Tyrosine 200mg
Ginkgo Leaf Extract 120mg
Magnesium 80mg 21%
Cayenne Powder (8:1) 50mg
Black Pepper 24mg
Niacin (Vitamin B3) 20mg 125%
Zinc 15mg 150%
Vitamin B6 1.8mg 129%
Riboflavin (Vitamin B2) 1.3mg 93%
Thiamine (Vitamin B1) 1.3mg 118%
Vitamin B12 10mcg 400%

Figures based on the total Daily Serving Size of 3 capsules. Each bottle contains 30 Daily Servings.


Incredible Results

Goodbye belly, hello waist.
I’ve always found it difficult to stick to a diet. Now I’ve lost over three stone. Very impressed.


Jessica Haines, 29
Southampton, UK.

It’s Agreed: Phentaslim Gets Results

Why choose Phentaslim? Easy. Customers enjoying real success. Read what they have to say, here.

We set out to create a scientifically supported diet supplement that’s natural, effective, and safe to use. We only allow premium-grade ingredients to make it into our formulas. High quality? Without a doubt!

And if things don’t quite go to plan? We’re here ready to answer your questions to help you along. And if things go completely wrong, you’re covered with our 60 Day Returns Guarantee.

Time to make a start.

The 4 Week Fat Blast

Included With Your Order: The 4 Week Fat Blast Ebook

Everything you need to know to shred fat, get fit, and change your life, in less than a month!

This 178-page eco-friendly digital-download contains all the advice you’ll need to achieve your weight loss goals.

NEW EDITION Made for easy reading on your phone

Simply add any package to your basket to receive this must-read guide to lasting weight loss.

SAVE With Phentaslim Deals Today:

SYNO Immune
Assist wellbeing with SYNO Immune boosting vitamins and pro-biotics.
£39 Absolutely No-Strings FREE BOTTLE with every order.

Value Pack


2+1 Bottle Free - 270 Capsules
90 Days Supply

+ Free UK Delivery 4 Week Fat Blast SYNO Gift

Selling Fast

RRP £78

SAVE! Best Value


3+2 Bottles Free - 450 Capsules
5 Months Supply

+ Free UK Delivery 4 Week Fat Blast SYNO Gift

Limited Stock SALE

RRP £117

Get Started


One Bottle - 90 Capsules
30 Days Supply

+ 4 Week Fat Blast SYNO Gift

Save Today

RRP £39

No Commitment

No Subscriptions

Please Note: This is NOT a subscription service. We do not currently offer subscriptions for our products. You will only receive the items you order today. Please keep this in mind when selecting your package to avoid any inconvenience.

60 Day Guarantee

60-Day Returns Guarantee

Order now with confidence. Our 60-Day Guarantee makes your purchase risk-free. Why are we so confident? Simple. Our incredibly low returns rate. This shows our products are changing lives and giving people like you the healthy lifestyle you deserve. Details.