How Do Night-Time Fat Burners Work?

Wouldn’t it be nice if you could burn fat and control your appetite while catching some shuteye? Fortunately, you can – with a nighttime fat burner!

But how do nighttime fat burners work anyway? How are they different from the regular fat burners people take during the day? Let’s find out in today’s post.

So, How Do Night-Time Fat Burners Work?

Night-time fat burners work by burning fat, suppressing your appetite, speeding up your nighttime metabolism, and blocking cortisol while you sleep or rest. They are also usually free of stimulants.

However, it still depends on the ingredients. Those that contain clean ingredients can be effective even when taken before bed.

Unlike daytime fat burners, nighttime fat burners usually don’t contain stimulants but are enriched with melatonin. Therefore, you won’t have to worry about headaches, jitters, or crashes. Instead, it just burns fat while you’re resting at night. 

Helping you lose weight while improving the quality of your sleep

Nighttime fat burners may even support a healthy night’s sleep because of the passion flower extract or melatonin content. It’s that simple.

Night Time Fat Burner Benefits

  • Works as a sleep aid

Some nighttime fat burners promote better sleep and help you get into a more consistent sleep cycle. A regular sleep cycle links to healthier body composition and better rest. Meanwhile, poor sleep has been associated with weight gain and higher body mass index (BMI).

  • Keeps you feeling full for a longer period

Good quality fat burners work pretty well to keep you feeling full for a longer period and regulate your blood sugar. As a result, you avoid food cravings and don’t wake up hungry.

  • Have thermogenic, metabolic effects

Fat burners have thermogenic, metabolic effects. Thermogenics burn calories and speed up your metabolism by generating heat.

  • Indirectly helps with muscle recovery 

Some nighttime fat-burning supplements indirectly help muscle recovery by increasing growth hormone and testosterone levels. As a result, it gives you that edge to bulk more in the gym.

  • Reduces cortisol

Your cortisol hormone may affect your sleep if you have a busy personal and professional life. Overexposure to cortisol or long-term activation of your body’s stress response system disrupts other bodily processes and puts you at increased risk of health problems. By taking a nighttime fat burner, you’ll feel more rested and lower your cortisol level.

Standout Ingredients in a Night-Time Fat Burner

Night-time fat burners typically contain a range of vitamins, herbs, fiber, minerals, and other plants. But below are some of the most standout ingredients because they potentially help burn calories and promote better sleep.


Melatonin promotes sleep and provides some insomnia relief. And as you know,  lack of sleep increases one’s affinity for foods high in fat, carbohydrates, and calories, leading to weight gain.

According to studies, melatonin may also have other positive effects on the body. For instance, it improves one’s ability to lose weight. It does so by working in two ways: helping to turn fat into energy rather than storing it and enhancing the thermogenic capacity of the mitochondria.

The mitochondria (cell organelles) activate the calorie-burning mechanism in the body. Although melatonin alone will not lead to massive weight loss, it is an excellent complementary weight loss strategy with a change in poor diet and increased physical activity.

Valerian Root

Good quality fat burner supplements contain valerian root. It is a herb commonly used in sleep aid supplements because of its calming properties.

People in the Middle Ages even used this herb, referred to as “nature’s Valium,” to treat sleep disorders. Another study showed that the valerian root promotes weight loss. Some theorized that it could be because it promotes better sleep or helps suppress lipid accumulation. 

A common side effect reported is having vivid dreams, perhaps because of the iridoid glycosides compound in valerian. Such a compound can increase serotonin in the brain to promote a relaxing sleep and may make dreams more vivid.

This fat burner ingredient is likely safe when used short-term and in doses of 300-600 mg daily, no longer than six weeks.


This amino acid may affect certain brain chemicals, including dopamine and serotonin, influencing sleep, cortisol, emotion, and mood. 

All these factors help the body deal with stress. Elevated cortisol in the body can cause cravings for salty, fatty, and sweet foods. You’ll commonly use this L-Theanine in dietary supplements. 

Aside from helping boost the immune system, as shown in several studies, it may also reduce one’s appetite, which can often lead to weight loss. Black tea, green tea, and certain types of mushrooms naturally contain this amino acid. 

Green Coffee Bean Extract

Coffee beans that have not yet been roasted contain green coffee bean extract in lower amounts of caffeine than in regular coffee. It may help in weight loss because of its chlorogenic acid content.

A 2013 review demonstrated that chlorogenic acid might help reduce insulin spikes and lower blood sugar levels, thereby lessening carbohydrate absorption in the stomach.

The green coffee bean extract in a nighttime fat burner also boosts your metabolism, improves obesity-related hormone levels, and lowers triglyceride and cholesterol levels. Please note, however, that many of the existing studies on green coffee bean extract’s effects on weight loss are on rats. More human studies are still needed.

Moreover, some PM fat burners contain green tea extract that breaks down excess body fat and boosts the amount of energy that the body uses.

White Kidney Bean Extract

This ingredient helps block carb absorption, decrease abdominal fat, control appetite, and have many other health benefits.

A review of randomized clinical trials of white kidney bean extract in daily doses of between 445 mg and 1,500 mg found a significant reduction in body fat (4 pounds on average) compared to a placebo.

A 2020 clinical study likewise showed a significant reduction in abdominal fat following the 35-day white kidney bean extract supplementation.

Vitamin B6

Vitamin B6 plays a significant role in metabolizing proteins, carbohydrates, and fats. Doing so improves your metabolism and lets you quickly lose weight and burn calories. These vitamins also keep the immune and nervous systems healthy.


This natural antioxidant helps decrease inflammation, speed metabolism, and improve overall health. The antioxidant content in ashwagandha likewise improves your digestive system, aiding in weight loss. 

Moreover, this Ayurvedic supplement has been used because of its medical purposes. It helps regulate the cortisol levels and adrenal glands in the body, eventually benefiting the nervous system. When it does, it improves your overall energy and helps you during workouts.

People Also Ask: FAQs About Night Time Fat Burners

Can you take a fat burner at night?

Yes, you can take a nighttime fat burner at night. However, follow the manufacturer’s instructions as it may suggest you take it with a meal and water. If it contains stimulants or is a daytime fat burner, kindly avoid taking it after 3 pm to keep you active or affect your sleep.

How do you burn fat while sleeping?

The idea may seem far-fetched, but you do burn fat while sleeping. The ingredients in PM fat burner, such as the L-carnitine and raspberry ketones, help target the body fat for energy production and transports fatty acids to the body cells.

Are fat burner supplements safe?

High-quality fat-burning supplements have a general safety profile as long as you don’t have too many. Nighttime fat burner supplements contain legal and approved ingredients. However, the US Food and Drug Administration does not regulate these supplements. 

Due to this, you may not get the complete picture of what’s found in the supplement. Before taking a fat-burning supplement, it’s best to talk to your doctor, especially if you’re taking other medications. 

Does night burn work?

Yes, but it still depends on the ingredients. Some fat burners contain proven ingredients to help boost energy, promote a good night’s rest and aid in weight loss. Meanwhile, fat burners contain ingredients without evidence that can jumpstart your metabolism or help the body burn fat.

Tips to Make Your Fat Burner Work Better

Go Slowly

Nighttime fat burners are just like other supplements. You have to take them gradually until your body adapts to the ingredients. Avoid taking too many capsules at a go just so your body will have extra fat-burning power. Doing so may hurt your chances of burning fat. Maybe begin with half the serving size and see how you’ll feel from there. 

Be Consistent

Some people buy a fat burner and take it only when they remember it or once in a while. That’s not how these supplements work. It’s essential to take them strategically and regularly to see the benefits.

Consider the Time You’re Taking It

Taking a fat burner at how the manufacturers suggested it will guarantee better results, especially for nighttime fat burners. It could be 30 to 45 minutes before bed or after a meal. For daytime fat burners, the best time of day to take them would be about 30 to 40 minutes before breakfast because the metabolic rate is at its slowest when you wake up.

Bottom Line

I hope you find this guide helpful. A high-quality nighttime fat burner works by supporting fat loss and metabolism while you sleep. It can also potentially help you feel your best and live healthier.

Still, remember that no weight loss supplement can magically lose belly fat overnight. With the right training plan and a healthy diet, a properly formulated nighttime fat burner can help you lose some weight and lose fat in stubborn areas while maintaining muscle tissue.

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Nathan Lloyd, MSc

I’m a personal trainer, based in Boulder, Colorado.
I service clients physically in the Boulder area, mainly in the ONE Boulder Fitness Gym, but am also available for online consulting and coaching.

If you’re interested in my personal coaching programs, please contact me via the contact page.