Losing weight can be a battle. No matter how often we exercise, change our routine, buy the latest bed, or newest diet fad, we just don’t lose any weight. Or worse, we gain more.

That’s why some of us turn to diet pills to aid in our weight-loss. Weight-loss diet pills can be a great way to get the most out of our diet and exercise routine. They can help us get everything we should out of our workouts. And they can help us maximise the results we see from healthy eating habits.

Our Reviews

When we conducted our reviews, we searched and researched for the best weight-loss diet pills on the market. What we found were five of the best out there. The great news for you is that each of them is equally good—but for different reasons. 

Because each product is formulated so differently, we found that each might be best for a different person. So we ended up with best overall, a best for women, a best for men, a best for strict metabolism boosting, and a best for caffeinated products.

That means that whatever type of product you’re looking for, we’ve found one of the best in the world for your goals.

Best Weight Loss Pills & Diet Supplements


   Best Overall  

Rating 4.9


   Best for Women  

Rating 4.8


   Best for Men  

Rating 4.5


  Best for 24-hour weight loss

Rating 4.5


   Best Caffeinated  

Rating 4.4

Our Reviews

When we conducted our reviews, we searched and researched for the best weight-loss diet pills on the market. What we found were five of the best out there. The great news for you is that each of them is equally good—but for different reasons. 

Because each product is formulated so differently, we found that each might be best for a different person. So we ended up with best overall, a best for women, a best for men, a best for strict metabolism boosting, and a best for caffeinated products.

That means that whatever type of product you’re looking for, we’ve found one of the best in the world for your goals.

PhenQ: Best Overall Weight Loss Supplement

We recommend PhenQ as the Best Overall weight-loss diet pill. Many weight-loss diet pills rely on similar formulas, containing thermogenics, fiber, and vitamin complexes. But PhenQ takes that tried and true recipe and combines it with a trademarked ingredient that takes their product to a different level.

The ingredient PhenQ uses is called α-Lacys Reset®. This branded compound is made of Cysteine and Alpha Lipoic Acid (ALA). ALA is a clinically researched, naturally occurring compound that helps the body process sugar.

This works as a weight-loss supplement because it helps your body process sugars more efficiently. That means that when you take in simple carbohydrates, your body will be less likely to store those carbs as triglycerides.

Another benefit of processing sugars more effectively is that you will start to crave them less. Because your body is burning them instead of processing them quickly into fat cells, your body will register more accurately that you’ve consumed calories.

ALA has also been researched to have a positive effect on mood. This is important because when we eat less carbohydrates, we might suffer from mood swings. ALA has been suggested to help limit those mood swings.

PhenQ also has a blend of thermogenics they’ve specially balanced for peak effect. They call this blend Capsimax, and it includes Vitamin B3 and capsicum. The nopal plant is also included for the added benefits of fiber. Many of the ingredients you’ll find in the other fat-burners are in this Capsimax Powder.

We recommend PhenQ as the best overall weight-loss diet pill for both men and women. It has scientifically backed studies suggesting its efficacy, and they boast over +190,000 positive reviews. On their website, PhenQ is offering 3 bottles, plus 2 free (5 total), and a free bottle of Advana Cleanse to detoxify, for $189.95. 

Ingredients List (tap to open)

  • A-Lacys Reset
  • Caffeine Anhydrous
  • Piperine
  • Chromium Picolinate
  • L-carnitine Tartrate
  • Calcium Carbonate
  • Nopal
  • Capsicum Extract
  • PROS

    • Clinically tested and proven formula.
    • Boosts metabolism and helps body burn more calories
    • Helps reduce tiredness and fatigue.
    • Blend of all-natural and safe ingredients.
    • Thousands of customers around the world.


    • Not recommended for people with high sensitivity to caffeine.
    • Only available through official website.

    Leanbean: Best Diet Pill for Women

    We recommend Leanbean as the best weight-loss diet pill for women. Fiber show up a lot in some weight-loss pills, and for good reason. But unlike most products, Leanbean was formulated just for women.

    Leanbean isolated one of the key problems with the modern diet: lack of fiber. Fiber is important for healthy weight loss because it serves two important functions. The first is to absorb water in our system, and when it does that, the fiber cells swell up and make us feel more full.

    The second secret weapon of fiber is that it can bond with lipids (fat) in our digestive tract, and slow down or even prevent our body from absorbing them. That means that what fats we do eat we have a better chance of not taking into our cells.

    But not every fiber is created equal. Some fibers are most useful as digestive aids, only, helping us with bloating or blockage. Some fibers are too soluble in our system. That means they absorb so much water that they dehydrate us, and don’t help with lipids in the digestive tract.

    Leanbean does the fiber-hunting for you, and they’ve identified glucomannan, from the konjac plant. This all-natural fiber works specifically for weight-loss and dieting purposes, helping the body feel more full and by helping absorb lipids.

    Leanbean also includes thermogenic ingredients to help you burn more calories, and includes caffeine to give you a boost in energy and focus ahead of workouts. Just remember, to get the full benefits of Leanbean, take with one or two glasses of water, about a half hour before eating.

    Taken as recommended, as part of a good routine, we recommend Leanbean as the best weight-loss diet pill for women.

    Leanbean can be a little more expensive. Their website offers a 3 months supply, plus 1 free month, for $189.97, with a 90 day money back guarantee. But they also offer free shipping, with that bundle, and a free downloadable workout routine.

    Ingredients List (tap to open)

  • Glucomannan
  • Choline
  • Chromium  
  • Zinc
  • Vitamins B6 and B12
  • Chloride
  • Green Coffee
  • Acai Berry
  • Tumeric
  • Garcinia Cambogia
  • Piperine

  • PROS

    • Effective appetite suppressant.
    • Helps decrease sugar cravings.
    • Especially designed for women.
    • Overwhelmingly positive reviews from customers. 
    • No side effects to be worried about.


    • Needs to be taken 3 times daily for best results. 
    • Premium pricing, but significantly lower when buying in bulk.

    PrimeShred: Best Weight Loss Supplement for Men

    Our recommendation for a weight-loss pill for men is PrimeShred. Right at the top, we recommend this for men, but also we recommend women stay away. The workhorse of PrimeShred is a specialized Caffeine called Anhydrous. This caffeine has been researched to have powerful results in men, but also possibly harmful effects in women.

    The extract Caffeine Anhydrous not only produces energy, but it also stimulates the body to produce more fat-burning enzymes. This means that you will burn more energy when you’re working out, but even when at rest.

    Another enzyme stimulating ingredient in PrimeShred is Rhodiola Rosea Root. This natural plant extract can help you break down fats already stored on the body, and also stimulates oxygenation to muscles, helping burn that fat during workouts.

    PrimeShred also has cayenne pepper, green tea extract, green coffee, and a vitamin B complex. These will all not only serve thermogenic purposes in your body, but will also give you great antioxidants. 

    The makers of PrimeShred are also looking out for your total health by including DMAE, L-Tyrosine, and L-Tyrosine. These three compounds will naturally help with your concentration and focus, while also helping stimulate hormones that can be helpful for mood and mental well-being. Like in PhenQ, these ingredients are included to help your body stave off the possible side-effects of burning more sugar and eating less.

    We recommend PrimeShred for men not only because it’s specially formulated to work best with the male body chemistry, but because of its well-balanced and thought out formula.

    PrimeShred is offering 3 months, plus 2 free months, for $149.99, plus free shipping and a 100 day money back guarantee.

    Ingredients List (tap to open)

  • L-Theanine
  • L-Tyrosine
  • Green Tea Extract
  • Green Coffee Bean Extract
  • Caffeine Anhydrous
  • Cayenne Pepper
  • Rhodiola Rosea Root
  • DMAE
  • Bioperine
  • Vitamin B Complex
  • PROS

    • Potent fat burning ingredients and strong formulation.
    • Includes nootropics for better brain function.
    • Vegan & vegetarian friendly.
    • Includes 100-day money-back guarantee. 


    • Not recommended for women. 
    • Not recommended for people with caffein sensitivities. 

    Phen24: Best for 24-hour Weight Loss

    Phen24 is our pick for best 24-hour weight loss because it works while you’re awake, and while you’re asleep. The two different supplements work together for a more comprehensive metabolism boost. 

    Phen24 is a unique two-pill supplement regimen that gives your body a day-time and a night-time assist. During the day, we may find that we need help burning calories, while at night, we may need help sleeping and staying away from the fridge. Phen24 helps with both.

    A key difference with Phen24 is their approach to the development of their weight-loss diet pill. Working with a Certified Herbalist, Nutritionist, and Naturopath, Phen24 looked at the issues of weight-gain and dieting through a holistic lens. 

    Using this approach, they understood that weight management is a 24 hour a day job, and can be tightly related to our Cortisol levels. A naturally occurring hormone, Cortisol helps us with everything from increased energy when we run up the stairs to helping our pupils dilate so we can see better under stress.

    But when our cortisol remains too high at night, it can cause us to eat when we’re not really in need of calories, or interfere with healthy sleep. And when we don’t sleep well, we’re more likely to drink sugary coffees in the morning, or eat unhealthy breakfasts.

    The nighttime formula has essential vitamins, but the two real heroes are the glucomannan and the green tea and hops blend. The glucomannan is a proven dietary fiber that will help you sleep better by making your body feel more full during its rest cycle. The green tea and hops have been recently studied to suppress appetite, reducing the urge to grab a midnight snack.

    To combat this cortisol imbalance, Phen24 has formulated two different pills, one to help us with thermogenics and energy during the day, the other to help us with food cravings and better sleep, at night.

    The daytime ingredients are essential minerals like Zinc and Copper; thermogenics like guarana and cayenne pepper; and a gentle appetite suppressant called L-Phenylalanine.

    The nighttime formula has glucomannan fiber for natural appetite suppression; a vitamin B and C complex to supply nutrients we may have missed during the day, which could give us food cravings at night; and green tea and hop extracts for an antioxidant punch.

    For a round-the-clock weight loss supplement and metabolism booster, we recommend Phen24. It’s available on their website at 3 bottles, plus 2 free, for $285.00.

    Ingredients List (tap to open)

    Day Formula:

    • Zinc
    • Manganese
    • Copper
    • Iodine
    • Caffeine
    • Guarana Extract
    • L-Phenylalanine
    • Cayenne Powder

    Night Formula:

    • Ascorbic Acid
    • Calcium D-Pantothenate
    • Pyridoxine HCI
    • Thiamine HCI
    • Chromium
    • D-Biotin
    • Molybdenum
    • Glucomannan
    • Griffonia Extract
    • Choline Bitartrate
    • Green Tea Extract
    • Hops Extract


    • Daytime and nighttime formula for a more comprehensive weight loss process. 
    • 2 different formulation for 2 different needs during the day/night.
    • Made with natural ingredients and essential vitamins.
    • Huge saving when buying in bulk.


    • Daytime formula contains a large amount of stimulants.
    • Nighttime formula not recommended for people with high sensitivities to caffeine.

    TrimTone: Best Caffeinated Diet Pill

    We recommend Trimtone for a weight-loss diet pill if you want a caffeinated product. Caffeine has been known for hundreds of years to increase energy. And anyone can tell you that when you have more energy, you move more; and when we move more, we lose more weight. 

    What makes Trimtone different is that they utilize caffeine from three distinct sources. The first source is caffeine extract—the straight energy booster. They include around 100mg in each pill of Trimtone. Then they have green coffee extract, which has something called chlorogenic acid, thought to perhaps reduce the sugar you take into your digestive tract when you eat. The third form of caffeine Trimtone uses is green tea extract, which is packed with antioxidants.

    Trimtone also has an ingredient that has made some headlines, recently, called Grains of Paradise. This little grain has been researched to increase our bodies response to burn brown adipose tissue (a form of body fat). Generally, we only burn the brown fat when we’re cold. But grains of paradise can help us burn that fat round the clock, regardless of temperature.

    Lastly, Trimtone uses the same proven glucomannan found in some of our other products. And as a final benefit of Trimtone, it’s a once-a-day, in the morning, single pill. It doesn’t get easier than that as a supplement.

    Trimtone has perhaps the best deal among the reviewed supplements. On their website they’re offering 3 months, plus 2 months for free, for $149.85, plus free shipping, along with a 100 day money back guarantee.

    Ingredients List (tap to open)

  • Glucomannan
  • Caffeine Anhydrous
  • Green Coffee
  • Green Tea
  • Grains of Paradise (Aframomum Melegueta)
  • PROS

    • Helps control hunger and cravings. 
    • Powerful ingredients to promote thermogenesis and boost energy.
    • Safe and natural ingredients list. 
    • 100-day money-back guarantee. 


    • High caffeine content.
    • Not vegan or vegetarian. 

    The Science Behind Diet Pills

    Fiber is an essential nutrient that, sadly, many of us don’t get enough of. What makes fiber so important is that it serves two functions. The first is to mix with water in our digestive tract and swell. This makes us feel more full. The second function of fiber is to bond with fat cells in our intestinal tract so that our bodies don’t absorb them as easily. 

    The second type of ingredient that a lot of weight-loss diet pills use is a metabolism booster. On some labels they call these metabolism boosters thermogenics. This is because thermogenics help your cells burn more energy.

    The final ingredient type that weight-loss diet pills use to help you optimize your workout and diet routine is a vitamin complex. Usually represented by vitamins from the B complex, these vitamins help your body burn sugars more effectively.

    Why Thermogenics Work

    In our modern diets, too often we eat simple carbohydrates. Sugars, processed grains, and white rice have crept into almost everything we eat. 

    Because of this, our bodies don’t work as hard as they should at burning the energy. Instead, our cells convert the simple carbohydrates into triglycerides and store them on our bodies as fat cells. So while food manufacturers keep marketing low-fat foods to us, they keep putting simple carbs into our diet. And then we turn the carbs into fat that gets stored in our problem areas, like our bellies or our thighs.

    But thermogenics can help us turn the tide on the modern diet. By retraining our cells to burn the sugars right away, as soon as they enter our system, we can avoid storing them as fat cells in our body.

    Risks and Side Effects

    We researched all our products for limited or no side-effects. What we did find in some of them is that if you have a sensitivity to caffeine, you try using smaller doses of some products until you know how your body will react.

    Another risk to be aware of is how your body will react to less sugars in the body. A lot of our recommended products (like PhenQ and PrimeShred) have ingredients that can help you with mood swings associated with lowering your diet’s sugar content. If you’re taking a product without any mood enhancers, just be aware of the changes that may take place.

    The last thing to be aware of when starting any supplement, diet, or workout routine is that you may start to feel different, physically. Sometimes when we start new routines or new supplements—especially if they work! We can accidentally overdo it in a workout. Just make sure you take it slow with some of these products.  


    We have all needed a little help, here and there. Especially with our weight-loss and fitness goals, it can be helpful to get a hold of a researched supplement that fits our lifestyle. 

    That’s why we researched our five weight-loss diet pills. Thanks to their unique ingredients, proven thermogenics and fibers, and vitamin complexes, we stand by our research into these supplements. 

    We found PhenQ the Best Overall; Leanbean was the Best for Women; PrimeShred was Best for Men; Phen24 was the Best Metabolism Booster pill; and Trimtone was Best Caffeinated.

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    Are Weight-Loss Diet Pills Safe?

    Yes. If you’ve done your research (like we have), you can easily find safe and effective weight-loss supplements.

    Are Weight-Loss Pills Effective?

    Yes. Again, not every product on the market totally effective, but we’ve researched only products with track records of success.

    Do these Weight-Loss Pills have any Guarantee? 

    Yes. We stuck with products from trusted sources who offer a range of money back guarantees. Check the website for the product best for you for full details on their money back offers.

    What Should I Avoid in a Weight-Loss Supplement?

    Try to avoid products without guarantees. Nearly every product we researched has some form of money-back guarantee. If a company believes in its product, it will stand behind them.

    What Can I Do in Conjunction with My Weight-Loss Diet Pills?

    The first two things are watch what you’re eating and watch your workouts. Not only should you be focusing on eating more fruits and vegetables, but avoid eating a lot of fatty foods after workouts. Alos, monitor your sleep and water intake. Caffeine is a great energy booster, but it can also dehydrate you. And rest is as important as the workout in any routine.

    About the Author

    Steven has been into health, nutrition, and fitness for over 10 years, and has a degree in Physical Education and Coaching. He is an expert in supplements and is devoted to helping his clients achieve their fitness goals and live their best lives.

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