If you’re looking for the best fat burners for women in 2021, we’ve got you covered. This handy guide will tell you everything you need to know, from how fat burners work to what the recommended dosages are for women. We’ll also explain what to look out for when choosing a fat burner for women and which false claims to be wary of.

Read on to learn more about the best fat burners for women now…

What to Consider When Choosing Fat Burners

If you’re thinking about using fat burners, the first question you probably have is: do they work? In short, fat burners do work, depending on the product you choose. To make things easier, this guide focuses on products that have proven benefits and are appropriate for women. 

Finding the most effective fat burners requires a little research as you’ll need to look at the ingredients, proven benefits, dosages and online reviews. However, we’ve taken the hard work out of finding fat burners for women by rounding up some of the most popular products and supplements out there. After careful consideration, we’ve found the best fat burners for women in 2021 to be:

Top Overall Fat Burner
  • Controls cravings and suppresses your appetite
  • Proven fat-burning formula
  • Suitable for vegans
#2 Pick
  • 100% vegan and free from chemicals
  • Anti-aging effects
Instant Knockout
#3 Pick
Instant Knockout
  • 100% natural and organic
  • You won’t need a low-calorie diet 
  • Appetite reduction 
  • Increases metabolism and energy levels
  • Comes with a money back guarantee

Leanbean – Top Overall Fat Burner

Leanbean has a reputation as being one of the most effective fat burners, which is why it’s at the top of our list. Some of its benefits include:

  • Proven fat-burning formula
  • Controls cravings and suppresses your appetite
  • Available at a reduced price at various retailers
  • Contains 3g of glucomannan which is approved for losing weight
  • Based on science and known to be effective
  • Suitable for vegans

How Does Leanbean Work?

Leanbean works by suppressing your appetite and doesn’t contain any stimulants. Instead, it contains glucomannan, which has already been approved as a weight loss solution in the EU. This natural fiber reduces your appetite and, therefore, your calorie consumption, which means your body will have fewer calories to convert to fat. By helping you to cut your calorie intake, Leanbean facilitates weight loss and helps you to achieve your goals.

In addition to this, Leanbean also contains choline and chromium. Choline is known to increase the body’s fat burning metabolism, while chromium helps to regulate blood sugar levels and keep them within a normal range. As a result, Leanbean can help you to lose weight more quickly, avoid cravings and maintain healthy blood sugar levels.

When used as part of a healthy lifestyle, Leanbean reduces your appetite so that you’ll feel less hungry and be satisfied with smaller meals. As you’ll be consuming fewer calories, Leanbean will promote weight loss and help you to maintain a healthy weight. 

PhenQ Fat Burner

Description of Product

PhenQ Fat Burner is a popular supplement used to aid in weight loss and speed up the body’s metabolism. Based on scientific research and studies, metabolism can be affected by thermogenesis. Similar to how the body burns fat when undergoing exercise, PhenQ’s formula increases your body’s burn rate without hitting the gym.

The special remedy of ingredients in PhenQ gives the body the best chance at losing weight by including just a few key items. Caffeine and L-carnitine make up the majority of this product, with capsimax powder, chromium picolinate, and nopal. PhenQ, although an appetite suppressant, is not one of the stronger products on the market, but is still effective for long-term weight loss

  P R O S 

  • 100% vegan and free from chemicals
  • Improves mild depression and anxiety
  • Increases mental alertness
  • Anti-aging effects

  C O N S

  • Can cause headaches, nausea, and dizziness
  • Caffeine content may affect sleep quality


PhenQ is reported as one of the safest fat-burning supplements and the fact that it’s completely natural and vegan makes it beneficial for anyone on a strict diet. As with any weight loss pill or liquid, there are side effects, however, PhenQ’s scientific research indicates that any adverse effects are rare and very short-lived. What makes PhenQ unique is that, unlike most fat-burning supplements that promote speedy rates of weight loss, this supplement takes a bit longer. This is the more natural way to lose weight, as it’s easier to maintain over the long term. Quick fat loss also means you are prone to pick all that weight up and more just as fast.

Instant Knockout Fat Burner

Description of Product

The instant Knockout Fat Burner supplement was originally produced for MMA fighters that needed a high level of energy while boosting their metabolism. With this product, you need to maintain an active lifestyle and continue to work out. One of the great things about the Instant Knockout Fat Burner is that it improves insulin sensitivity, making it suitable for diabetics. 

The nutritional ingredients to this fat-burning pill form a long list. From the Vitamin B family, zinc, and green tea, to cayenne pepper and chromium, this product has used scientific evidence to make the perfect weight-loss substance. Due to all the natural ingredients, the Instant Knockout Fat Burner supplement works to burn more fat while you exercise and keep your appetite at bay

  P R O S 

  • Highly effective as an appetite suppressant
  • 100% natural and organic
  • You won’t need a low-calorie diet
  • Fat won’t accumulate as easily

  C O N S

  • Requires a regular workout routine
  • May cause stomach problems
  • A minimum of 4 tablets daily can be expensive


This natural fat-burning supplement is very effective for stopping the process of fat accumulation and with an all-natural ingredient list, it’s safe for many diets. The product has even been redesigned to be suitable for vegans and vegetarians. The only real drawback to this supplement is that the caffeine level may keep you awake. This is easily fixed by just taking your last dose a few hours earlier than your normal bedtime. As this product was designed for athletic individuals, it maintains good lean muscle and you won’t lose any mass as long as you continue to work out.

Powher – Best Fat Burner with Caffeine

If you’re looking for the best fat burner that contains caffeine, Powher might be what you’re searching for. Some of its notable benefits include:

  • Appetite reduction via 3g of glucomannan
  • Increases metabolism and energy levels
  • Formulated for women
  • Helps to maintain calorie deficit
  • Available at a discount when purchased in bulk at many stores
  • Comes with a money back guarantee

Powher contains glucomannan to help reduce calorie intake, but it also features caffeine. This popular stimulant can boost your energy levels and speed up your metabolism. As a result, you can take your workouts to a new level and burn calories more quickly than before, both of which will help you to lose weight.

If you have an active lifestyle or you want to increase the amount of activity you do, Powher’s energy-increasing properties can help you to maintain and enhance the amount of exercise you undertake. 

Powher is based on a unique blend of natural stimulants, fibers and minerals that should enable you to work harder over a longer period of time. In doing so, you’ll burn calories more quickly and lose weight at a faster rate. 

Littledrops – CBD-based Appetite Suppression

Many people overlook the benefits of CBD when it comes to weight loss. In fact, some people assume that CBD, or cannabidiol, creates food cravings, which isn’t the case. When you ingest CBD, it can actually reduce cravings and suppress your appetite, which leads to a decreased calorie intake and faster fat loss. 

CBD also increases brown adipose tissue (‘brown fat’). This type of fat helps your body to keep warm and breaks down fat and glucose to do this. As a result, CBD can help you to lose the ‘white fat’ associated with weight gain and obesity by promoting the ‘brown fat’ that helps your body to function. 

If you don’t want to take a pill to assist with fat loss, CBD gummies, like Littledrops, could be the ideal alternative. Each Littledrop gummy contains 20mg of CBD, which is enough to have an impact on your appetite and can help you to burn fat faster.

ShredFIERCE – Effective Metabolism Booster

A healthy metabolism is key to successful weight loss and ShredFIERCE can help to boost your metabolism swiftly, which is why we’ve included it on our list of the best fat burners for women 2021. Its benefits include:

  • Appetite suppression to reduce calorie intake
  • Increase in energy to fuel longer, harder workouts
  • Burn calories more quickly with an enhanced metabolism
  • Contains only natural ingredients

It’s easy to assume that ShredFIERCE is designed for men, particularly if you look at their website. However, ShredFIERCE can be used by both men and women, so there’s no need for females to be dissuaded. 

Many people find that ShredFIERCE helps them to ‘hack their metabolism’ and achieve their fitness goals more quickly. Although women tend to experience more cravings than men when losing weight, this won’t prevent ShredFIERCE from delivering the results you’re after. If you want to burn fat through an active lifestyle, boost your energy and maximize your workouts, ShredFIERCE could be a great option for you. 

Alli – Stimulant-Free Fat Burner

If you’ve already looked into fat burners, you might know that some products are only available via a prescription. Although Alli contains Orlistat, which usually requires a prescription, it’s available to buy over the counter. If you want to try a powerful fat burner without requesting a prescription, take a look at some of the benefits Alli offers:

  • Features Orlistat as its active ingredient
  • Designed to help treat obesity
  • Available over the counter

Although Alli isn’t considered a supplement, it is a powerful way to burn fat. In fact, some people find that it delivers the same results as prescription medication. 

How Does Alli Work?

Orlistat is a proven fat-burner and designed for people with a BMI of more than 28. Alli contains 60mg of Orlistat, which is around 50% less than you’d find in prescription medications. However, this doesn’t prevent Alli from delivering great results and means you can purchase it over the counter.

Orlistat helps you to lose weight by reducing the amount of fat that the body absorbs via the digestive system. As you aren’t absorbing as much of the fat that you ingest, the body doesn’t need to burn it off. Instead, the body can burn existing fat cells, which leads to a reduction in weight.

However, it’s important to know that Orlistat can cause side effects in some people. Due to this, it’s essential to check what dose you should use and stick to it accordingly. Similarly, you should read the instructions before using the product and you might want to seek medical advice before or while using Orlistat for weight loss. 

Do Fat Burners for Women Really Work? 

People are often wary that fat burners are a scam or that they don’t offer genuine results. However, the right fat burner can genuinely help you to lose weight. Frustratingly, many of the products out there aren’t based on science, which means they don’t always provide the results you’re looking for. 

Although you’ll find hundreds of fat burners online and in stores like Walmart or on sites like GNC and Amazon, you still need to do thorough research to determine which ones are most effective. When you’re choosing which fat burner for women to purchase, be sure to consider the following:

  • Are the claims realistic? – Many fat burners make outrageous claims about what they’re capable of, which means they’re unlikely to live up to your expectations. Instead, fat burners that make realistic claims in line with the EFGA are more likely to deliver reliable results.
  • What ingredients are used? – Every product or supplement should have a full list of ingredients, so research what a fat burner contains beforehand and see whether any of the ingredients have genuine fat burning properties.
  • How much is it? – A higher price doesn’t necessarily indicate the product will work, so don’t get enticed into overspending. Often, it’s mid-priced products that are the most effective when it comes to fat burners.
  • What’s the dosage? – The ingredients in a fat burner are important but if only a small amount is included, it may not deliver the desired results. Compare the dosage and determine whether the amount of fat burning ingredients contained in the product are likely to produce meaningful results.
  • Are there any reviews? – Check whether a product has online reviews before you decide whether to buy it and, if so, read these carefully to find out what the consensus is. Customers often leave feedback and testimonials, which means online reviews can be a useful way to access the information you’re looking for on a particular fat burner.

As there are so many fat burners on the market, having a checklist makes it easier to compare products. Start with the points outlined above and compare different products to see which ones are the most effective. This gives you the best chance of purchasing a product that delivers results and works best for you.

Natural Fat Burners – How Do They Work?

Men and women process and burn fat in virtually the same way but there are minor differences in how male and female bodies do this. Due to this, some ingredients are more effective for women and vice versa. As a result, fat burners that are specially formulated for women are likely to produce the best results for females. 

To find out how most natural fat burners work, take a look at the key mechanisms:

Appetite Suppression

Research suggests that women experience more food cravings than their male counterparts. In fact, studies have shown that females typically experience up to 15.6% more cravings. Many people struggle to beat cravings when they’re trying to lose weight, so it’s important that fat burners for women help to reduce food cravings to facilitate weight loss.

Natural appetite suppressors can work in two ways. Firstly, it can take up space in your stomach, so that you feel fuller for longer and don’t experience hunger as frequently. Secondly, they interrupt the signals sent by your stomach to your brain that tell you you’re hungry. 

Either of these mechanisms can trick your body into thinking it’s not hungry, which means you’ll consume less food. By doing so, your calorie intake is reduced, and weight loss is promoted. Common natural ingredients that are used in fat burners to suppress appetite include:

  • Glucomannan – a natural fiber that expands when it comes into contact with water. When present in the stomach, this takes up more space and leaves you feeling full.
  • CBD – Extracted from the cannabis plant, research has yet to show exactly how CBD suppresses the appetite, but anecdotal evidence suggests this is a common effect.
  • 5-HTP – used in the production of serotonin by the brain. When levels of 5-HTP are increased, your body feels less hungry.

Increase in Metabolism

Your metabolism governs how quickly food is converted into energy, so a faster metabolism means that calories are converted into fuel more quickly, rather than being stored in the body. Some fat burners increase your metabolism by elevating your heart rate, whereas others do so by including various minerals and nutrients. Alternatively, some fat burners may contain stimulants, such as caffeine, that are used to increase your metabolic rate.

However, men and women tend to have different tolerance levels when it comes to stimulants. For example, one study found that women with higher estrogen levels had a lower tolerance to caffeine than men. 

As a result, fat burners for women typically include lower doses of stimulants. Similarly, powerful stimulants, like synephrine and guarana, may not be included in fat burners formulated for women at all. 

Some of the most effective ingredients that are known to increase the metabolism are:

  • L-carnitine – an amino acid that aids in the transfer of fat into energy-producing cells
  • Vitamin B6 – plays an essential role in the metabolic process, so higher levels in the body can speed up the metabolism


When the body produces heat, it uses fat cells as energy. Fat burners that have a thermogenic effect can therefore work more effectively. If the body produces more heat, for example, it uses more energy and burns more fat. 

Many fat burners that promote thermogenesis contain capsaicin, caffeine, green tea extracts and/or turmeric. Studies into these ingredients note that turmeric and green tea has been recognized for its thermogenic effects for centuries. What’s more – green tea extract can help you to burn fat even when you’re at rest, which maximizes the effect and helps you to burn fat faster.

Selecting a Fat Burner – What to Avoid

As well as knowing what to look for when choosing a fat burner, it’s important to know what you should avoid. Sadly, some manufacturers are more interested in generating revenue than actually delivering results but, by knowing what to avoid, you can ensure that you don’t waste time and money on products that don’t deliver results.

As fat burners aren’t regulated by the Food and Drug Administration (FDA), manufacturers have a lot of flexibility when it comes to which ingredients to include. Although many potential harmful products have been removed from shelves, it’s also advisable to research ingredients to determine whether any could be harmful or cause unwanted side effects. 

To find out which fat burners aren’t right for you, take a look at this list of ingredients that you should steer clear of:

Ingredients to Avoid

  • Ephedra – Increases blood pressure and heart rate, which can lead to unpleasant side effects and increase the risk of strokes and heart attacks.
  • 2,4 Dinitrophenol (DNP) – a potent metabolism booster, this ingredient can be fatal when it’s used in particular ways. Not only is it extremely dangerous, but it is also illegal, so be sure to report any products you see that contain this ingredient. 
  • M-synephrine – increases blood pressure and heart rate but has a less noticeable effect than Ephedra. However, it can cross the blood-brain barrier, so should be used with caution. Also sold as p-synephrine and o-synephrine, it is not known to be harmful when used in isolation but could be dangerous if combined with caffeine.

Do Fat Burners Cause Side Effects?

As many fat burner ingredients are natural, they do not typically cause many side effects when they’re used appropriately and taken in recommended doses. However, it is still possible that you’ll experience some side effects, even when using a natural fat burner. 

Some of the most common fat burner side effects reported include bloating, jitters, diarrhea, anxiety and gastrointestinal discomfort. 

Anxiety and jitters occur most frequently when using a product that contains caffeine. Before you use a fat burner or if you experience these side effects, check whether the dosage of caffeine is right for you.

Other side effects often occur because the user exceeds the recommended dose or because a product contains higher amounts of an active ingredient than advertised. If you experience any side effects after using a fat burner, you should stop using the product and obtain medical advice. 

Prescription vs Over the Counter Fat Burners

Prescription fat burners are typically more potent than over the counter products, but they can only be supplied by a medical professional. As prescription products are regulated and tested before being introduced, they have known benefits and scientific backing.

However, doctors will only usually prescribe fat burners if there is an urgent need for weight loss due to health reasons or if an underlying condition affects your weight or impedes your ability to lose weight. As a result, not everyone is able to obtain prescription fat burners.

It’s worth noting that prescription fat burners typically contain high doses of active ingredients, which means they may cause side effects. When taking prescription fat burners, you will need to be assessed on a regular basis so that your doctor can monitor you. Side effects of prescription-strength fat burners include:

  • Gastrointestinal distress
  • Temporary incontinence
  • Oily stools
  • Diarrhea

Fat Burning Products and Supplements: FAQs

Although this guide contains comprehensive information about fat burners, you might have some additional questions. Here, we’ve rounded up some of the most frequently asked questions about fat burners:

When Should I Use a Fat Burner?

When using any fat burner, it’s important to read the instructions and follow them carefully. However, most fat burners should be taken around 30-40 minutes before a meal. By taking them before a meal, you’re giving them long enough to have an impact on the digestive system. 

If you use a fat burner which contains caffeine, avoid taking this in the evening. Stimulants such as caffeine help to keep you alert which may make it difficult to sleep if you take it too late in the day.

Do I Need to Exercise While Using Fat Burners?

Many people rely on fat burners in isolation to lose weight, so it’s possible that you will still lose weight, even if you don’t exercise. Providing your body is using more calories than you consume, weight loss should occur. 

Despite this, fat burners are not designed to replace the need for exercise and any products that claim to be a replacement for physical activity are likely to be a scam. There are many benefits associated with regular physical exercise, including weight loss, so try and incorporate activity into your routine, if you’re able to do so. 

What Are Night-Time Fat Burners?

If a product claims to help you burn fat while you’re asleep, it’s known as a ‘night-time fat burner’. The body’s metabolism continues while you’re asleep, so this type of fat burner aims to speed up the process. 

Generally, night-time fat burners have different ingredients to standard fat burners or lower doses of similar ingredients. This is because they are designed to work while you are sleeping and some ingredients, like stimulants, would make it difficult to get to sleep. Night-time fat burners are more likely to contain ingredients that increase your body temperature and plant extracts that promote relaxation, for example. 

Are Fat Burners Safe?

Fat burners are typically safe for the majority of people, providing you use them as directed. 

People sometimes assume that taking higher doses will speed up the process and deliver results more quickly, but this is unlikely. In fact, taking higher than the recommended dosage or using more than one fat burner at a time is likely to cause adverse effects. 

If you’re unsure whether a fat burner is the right choice for you, you should always seek medical advice.

Can I Take Fat Burners While Pregnant?

No. It is not advisable to take diet pills, fat burners or other supplements while pregnant, unless you are advised to do so by your doctor. If you were using a fat burner before falling pregnant, talk to a medical professional about whether it’s safe to continue using the product.

Fat Burners for Women: Conclusion

This guide has given you an in-depth look at some of the best fat burners for women in 2021. Now you know what the benefits are of particular products as well as how fat burners work and what specific ingredients do. This should give you an insight into whether a fat burner is the best method of weight loss for you and, if so, which types of products are most suited to your needs. 

If you need to lose weight quickly, for example, Orlistat might be the right choice but, if you’re looking for a natural fat burner, you may prefer Leanbean or Powher. Choosing a fat burner is a personal decision, so take all the time you need to research products and ingredients before making a choice. By doing so, you’ll be well-informed and able to select a fat burner for women that delivers the results you’re looking for. 

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