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33 reviews


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.


This will also add the following products to your cart:

  • 4 Week Fat Blast Gift
  • SYNO Immune (Free)

Included With Your Order:

The 4 Week Fat Blast eBook
The 4 Week Fat Blast eBook
178-pages of all you need to know for achieving your weight loss goals.
£25 FREE With Every Order.
SYNO Immune
Better Wellbeing with SYNO Immune boosting vitamins and pro-biotics.
£29 Absolutely No-Strings FREE BOTTLE with every order.



Burn Calories. Increase Energy. Get Results.


Advanced Thermogenic Formula to Ignite Your Metabolism


Fight the Fatigue of dieting and Stay On Track


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.

Take Control With Phentaslim.

Vegan Friendly


Phentaslim Uncovered

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

We also believe you should know exactly what’s in your supplements, we don’t hide behind secret formulas or made-up names for everyday ingredients.

Here’s is everything you need to know about what’s in Phentaslim. We have nothing to hide.

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.

It’s Agreed: Phentaslim Gets Results

Why choose Phentaslim? Easy. Customers enjoying real success. Just take a look at the reviews section, below.

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.

Get Started, Today

The 4 Week Fat Blast Ebook
FREE UK Delivery
available on orders over £39.

Vegan Friendly
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Reviews for Phentaslim


Based on 32 reviews
  1. Alice (verified owner)

    Good product, easy to take, no side effects for me and have seen a big difference using these over the last few months. Would recommend.

  2. Jake Davis (verified owner)

    Brilliant supplement to assist with fat burning. Provides the right amount of energy boost and thermogenic properties to help increase shifting weight.

  3. Fi (verified owner)

    Very happy with this product! I had been counting calories already, but definitely noticed an improvement when using these pills too

  4. Warren Matthews (verified owner)

    Top stuff. Have shifted some stubborn fat around my middle using these. I incorporated these into my current exercise regime as I didn’t make any changes to my lifestyle as such. Two thumbs up.

  5. Kelly (verified owner)

    Using with exercise and seeing a difference. Seeing everything coming together helps to make me feel good about myself, which is just as important as losing the weight. These are not magic pills, you have to use them properly otherwise you’re just kidding yourself.

  6. Amy Rush (verified owner)

    Has helped me lose a bit of weight, cant complain about that. Only using two capsules a day though because I find it makes me feel a bit jittery. I do drink coffee as well so probably my own fault lol. I did read a thing about not overdoing the caffeine.

  7. Sian Booth (verified owner)

    Very happy with my results so far. Product working great for me.

  8. Naz Rahman (verified owner)

    This is a very good product. Can feel the effects. Starting to see the results after a month. More active, eating less takeaway. Every bit helps. Making good progress after years of nothing but weight gain.

  9. Kirsty (verified owner)

    These didn’t do anything for me or decreased my appetite but everyone is different and some products work for people and some don’t,definitely recommend people trying it there is more positive reviews than negative so plz don’t be put off by this.

  10. Sophie (verified owner)

    Starting to see some promising results now. Has certainly helped get me motivated and moving more. Got fed up with fad diets and pills that promise and never deliver. Fat Blast book full of good info, too. Basically, this is for people who are serious about losing weight and doing it the proper way.

  11. Terry (verified owner)

    I had my doubts. I was wrong. Absolutely smashing product. I’m down nearly a stone already and I’ve only been at it for only four weeks (almost).

  12. Tanya (verified owner)

    Working fab. One month in, nearly a stone gone. Result!

  13. Jaime (verified owner)

    Phentaslim helps me with my weight loss program. I yo-yo quite a lot with my weight and have found this helps me manage better the different phases, so I’m more often losing weight than I am gaining it. I really have struggled over the years to keep my weight stable. Using this I feel I’m finally getting some control over my body.

  14. Kev (verified owner)

    Bit embarrassed by my weight. Thought I’d give these a go, see if they help. Early days but, yeah, looking promising. Actually lost some weight for once. I am in my fifties now so normal weight loss itself is hard work. Needed help, found it.

    • Phentaslim Support

      Nothing to be embarrassed about, but we get what you mean. Yes, it’s true, losing weight can be more difficult as we age due to a slower metabolism. But, as you’re finding, it certainly does not mean weight loss cannot be achieved. We think you’re doing great; keep going.

  15. Mike (verified owner)

    Pretty sure my problem is the same for many. I’ve gained weight around my middle as I’ve gotten older. I can’t really be bothered with heavy exercise anymore just a bit of brisk walking. Taking these twice a day. Breakfast and lunch only. Starting to see the weight reduction on my waist and I’ll be happy if it stabilizes. Not expecting a six-pack! Happy to continue using it. No side effects to speak off. I don’t take the evening capsule because I don’t want to risk getting an energy boost later on when I’d rather be napping.

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