(19 customer reviews)

From: £39.00

A powerful, metabolic diet formula for increased weight-loss and energy.



Phentaslim combines powerful ingredients into one capsule to target your weight loss in six ways.

Burn fat
Increase your metabolism to melt away excess fat and reveal a slimmer, sexier you

Reduce cravings
Eliminate daytime and evening cravings which keeps you feeling fuller for longer

Burn calories
Prevent additional weight gain and fat storage by burning excess calories

Boost energy
Avoid the energy slumps of dieting with an energy boost that powers you through the day

Mental clarity
No more mental fog! Improve mood and boost mental resolve to keep you motivated and ready to take action

Boost health
Packed with vitamins, minerals and powerful antioxidants – boost immune and health

In less than one minute a day, you can supercharge your life!

19 reviews for Phentaslim

  1. Becks P

    Just about to buy these again as they are great support with weight loss. Can’t believe Mel Hill thinks just taking a pill will lose weight. You need to exercise idiot! Just doing 10000 steps a day would get things going!

    • Mila

      Hi Becks,

      Thanks for your feedback. It’s great to hear you’re having success using this product. You’re right about the 10,000 steps – it’s a brilliant starter solution for those who find any sort of exercise daunting, or those with other medical issues that might make any exercise difficult. The apps available for smartphones are great for tracking how many steps you’ve done during the day – the newer versions of iOS for iPhone even includes a steps counter in their preloaded Health app. It’s the one I use to keep myself in check.

  2. John H (verified owner)

    I started on these back in July, since then I have lost 7.5kg. I exercise 4 times a week running 4k. I can honestly say these pills have really contributed to my weight loss. The key is and like the product description says you must combine them with exercise. Ive seen a silly review on here complaining they dont work and they didn’t exercise. They just want to take a pill to loose weight, this perhaps maybe the reason they are the size they are. This is silly as it is clearly stated that these work in combination with exercise and I am proof they work.

  3. Jan

    Thank you. Feel like I’m finally making some progress after years of struggling. I’ve struggled to lose my pregnancy weight gain (my child is now three!) and now I’m taking these, a bit of moderate exercise (mostly walking the dog!) I can see some changes already. Just using these, thinking I should have tried the combo with the trim pills as well, but not in a rush to slim down so it’s okay.

  4. Jo Fletcher

    Impressed with the energy I get from these. They take about 30 minutes to kick in and I get a warming sensation running through my body which fades after a while. It’s not uncomfortable at all. In my first week I’ve lost 3lbs using these whilst maintaining a little cleaner diet. Fab!

  5. Sammy

    These really do boost your metabolism. Finding myself working up a sweat even on just a slow walk.

  6. Tina Coyle

    Arrived fast.

  7. Liza Giese

    I use these in combo with phentatrim. Three weeks in, five pounds lost. I’m not exercising much though (bad knees, old hips) though I am trying to go for a little walk daily and trying to eat less sugary things. Five pounds may not sound like much but for me it’s a miracle. I usually add a pound or two every few weeks. Not any more. Will keep at it.

  8. Chris Teeson

    Happy with my purchase. Wasn’t expecting much, tried loads of supps before, but these ones you can feel getting to work. Keen gym goer and these are helping to shift some stubborn fat around my waist that I was struggling to shift.

    I think these work best if you put a little effort in as well. No pills are going to do anything if you take them and just carry on eating junk food and sitting about. Losing weight is also about making some lifestyle changes and not just swallowing a pill, like someone commented on this page.

    I would recommend these to a friend, yes. Not the cheapest pills I know, but you get what you pay for and these do as they say in my experience. It’s a yes from me.

  9. Dylan Baker

    Actually impressed with these. Proper ingredients, correct amounts and minimal side-effects yet noticeable results. 6lbs of lost weight over four weeks. Wont be needing that money-back guarantee, guys. Cheers.

  10. Mel Hill

    Can’t say I look any different. Still fat and I can’t believe customer service told me I have to exercise as well. At this price you shouldn’t have to do anything but swallow. Money back now please. Not happy.

  11. Janet Rickman

    I’ve struugled for years with my weight. It’s great to finally find a diet pill that actually does something. I’ve managed to lose two stone over the past four months which is fabulous and I can’t thank you enough. I took on board the advice to make slight changes to my diet and exercise and found myself some willpower. The end result has been worth it.

  12. Shannon Baxter

    I think these are a bit too powerful for me. Maybe you should make a weaker version for people who are sensitive to the ingredients?

  13. Owen Flynn

    I’m only 5 foot 7 but weigh just over 13 stones I need to sort my life out I’ll be 30 next week. Started going gym after hard days work plastering (matey boy does the tiling, I do the real work lol). Been popping these magic pills for a bit now and weight is coming off slowly but it’s working. If I forgot to take my pills during the day I never feel like going to the gym, just don’t have the energy. When I remember to take these Im like a kid and can’t wait to get running and pumping with the other lads after work. Sometimes get a bit light headed taking these but think thats because I neck coffee like it’s water. Should prob switch to decaf.

  14. F. N. Santos

    Couldn’t get on with these, didn’t enjoy feeling… not sure how to explain this, but ‘warmed up’ would be fairly accurate. Not quite ‘body in a firestorm’ but certainly ‘gentle fire inside’ stuff. Customer service accepted my return yesterday and refunded me this morning. Thanks.

  15. Aimee

    Order came fast, thanks.

  16. Callum Bartlett

    Been on this just over a week now and I can tell it’s helping me. Got more energy for a start, keeps me going.

  17. Imogen Sheppard

    I messed up my order and it was shipped to the wrong address. Customer support were great and understanding, and resent my order without any fuss to the correct address even though it was my fault. Have been using the pills for a week already and fingers crossed, I’m feeling good.

  18. Paige Dobson

    Good stuff. Might want to cut down on any extra caffeine cuz these deffo perk you up. Lost 4lbs this month so far. Will keep on going

  19. Rachel Carter

    Found the weight dropping off me and felt absolutely amazing at the same time – dropping 2 dress sizes blew me away and it’s not over yet. Now it’s time to tone my belly and get the flat abs I’ve dreamed of.

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Green Tea (4:1) (375mg)
Accelerates metabolism naturallyPotent polyphenols in the form of Catechins seen in Green tea to have incredible properties and shown to increase thermogenesis without increasing the heart rate, stimulate fat oxidation, reduce body fat, reduce cholesterol levels and blood pressure.Caffeine Anhydrous (270mg)
Boosts metabolism, energy and curbs hunger.Studies have concluded caffeine to be effective for weight loss. Its a metabolic stimulant that increases wakefulness, alertness and focus. It also effects the appetite by making you feel less hungry. And for those who exercise regularly, could help train at a greater power output and/or to train longer.

L-Theanine (225mg)
Promotes improved cognition and attention.

This non-essential amino acid has excellent relaxing and attention promoting properties when combined with caffeine in the right dose – which Phentaslim has! Not only does this ingredient reduce the perception of stress but can reduce the potential for anxiety.

Acetyl L-Carnitine (200mg)
Fuel metabolism, protect lean muscle and support exercise recovery.

Popular amino acid that plays a vital role in the metabolism of fat. Positively influences fat metabolism by increasing the transport of fats into cells for energy. This ingredient truly helps exercise recovery and fat metabolism.

L-Tyrosine (200mg)
Improved fat oxidation and exercise performance.

Evidence to suggest can help to suppress appetite, increase resting energy expenditure and increase fat oxidation – which means you could burn more fat.

Panax Ginseng (10:1) (1200mg)
Support mental performance and well-being.

Contributes to physical and mental well-being and supports energetic alertness. Supports and contributes to the body’s natural defences and the immune system.

Guarana Seed (4:1) (400mg)
Slow release energy without the jitters.

Guarana is an exceptional fruit extract that is naturally high in caffeine, which gives extra energy and has additional benefits of increasing memory, alertness and mood. It also acts to suppress the appetite.

Magnesium (80mg)
Normalises functioning of the nervous system.

Contributes to normal muscle function and helps to maintain normal bones and teeth. Phentaslim helps combat low magnesium levels to ensure optimal muscular functioning.

Cayenne Pepper (50mg)
Boosts your metabolism and helps to suppress your appetite.

Capsicum extract has been shown to be effective at increasing the ability to absorb other ingredients by increasing the blood flow to the responsible receptors and increases the bodies core temperature giving you the ability to burn more calories.

Niacin (Nicotonic Acid) (20mg)
Important for general good health.

When taken at sufficient levels vitamin B3 can lower cholesterol levels and strengthen heart health.

Zinc (as Zinc Acetate) (15mg)
Sustain energy levels.

Helps your body to process carbohydrate, fat and proteins into fuel which sustains your energy levels. This is particularly important if you’re exercising hard to get into shape.

Black Pepper extract (4:1) (24mg)
Improves absorption of other ingredients.

We make sure you get the ingredients into your body effectively and efficiently with the use of black pepper extract aiding absorption by up to 150%.

Vitamin B6 (as Pyridoxine HCL) (1.8mg)
Metabolism and energy booster.

Metabolism booster, helping the body to properly convert food into energy, while burning excess fat. Vitamin B6 also helps muscle growth by increasing the absorption of amino acids and protein which is vital to feed growing muscles.

Riboflavin (Vitamin B2) (1.3mg)
Helps release energy from food.

Vitamin B2 is not stored in the body so we ensure you get the optimum amount to breakdown and release energy from your food.

Thiamin (Vitamin B1) (1.3mg)
Breakdowns and releases more energy from food.

Works with other B-group vitamins to help break down and release energy from food keeping the nervous system healthy. Thiamine also helps digestive problems including poor appetite.

Vitamin B12 (as Cyanocobalamin) (10mcg)
Boosts mood, energy, concentration and the immune system.

Water-soluble vitamin with a key role in the normal functioning of the brain and nervous system, and for the formation of blood.

Other Ingredients: Capsule shell (gelatin), bulking agent (rice flour), anti-caking agent (magnesium stearate).