Lean PM Review 2023: Does This Fat Burner Supplement Work?

Chelsea Rae Bourgeois

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Medically reviewed by Kathy Shattler, MS, RDN

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Jacked Factory Lean PM




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  • Can help burn fat and promote restful sleep.
  • Stimulant-free.
  • Contains 200 milligrams of L-theanine.
  • Contains five milligrams of BioPerine.
  • Can help control food cravings.
  • Manufactured in a good manufacturing practice-certified facility.

Brand Information

  • Started in 2015.
  • Sells various dietary supplements.
  • 100% money-back guarantee.
  • Manufactured in cGMP-facility.

Medical Benefits

  • Helps you fall asleep faster.
  • Contains 200 milligrams of L-theanine.
  • Stimulant-free.
  • Helps suppress appetite.

About The Brand

When Jacked Factory started in 2015, its founders set out to deliver products with exceptional value backed by outstanding customer service. In addition, they wanted their brand to go against the status quo and provide athletes with effective, high-quality supplements at an affordable price. 

Years later, the company sells a wide range of products, including pre-workout supplements, intra-workout supplements, protein powders, post-workout supplements, and fat burners. 

Jacked Factory has several fat burner supplements, including their ever-popular Lean PM fat burner, designed to simultaneously support sleep hygiene and fat burning. This weight loss aid can help you fall asleep faster and achieve a more restful sleep cycle overall. 

In this Lean PM review, we’ll discuss how the fat-loss supplement works for both a weight loss and sleep aid, and we’ll break down its science-based formula to help you decide if the nighttime fat burner is an appropriate addition to your weight loss regimen. 

What Is Jacked Factory Lean PM?

Jacked Factory’s Lean PM is both a night-time fat burner and a sleep-aid supplement. Its science-based formula is designed to help you burn fat while achieving a more restful night of sleep. 

Since Lean PM does not contain caffeine or other stimulants, it’s not likely to give you jitters or headaches. So just how does Lean PM work?

Its research-backed ingredients suppress your appetite and help you control night-time food cravings. Additionally, it contains melatonin, which can act as a sleep aid, helping you fall asleep quickly and reach a deeper, more restful sleep. 

Logistically, Lean PM fat burner can help you lose weight or stubborn body fat by supporting your sleep hygiene and eliminating times you may eat outside of your calorie deficit. 

Feature Product & Coupon

Jacked Factory Lean PM

Best Reputation

Lean PM

  • Can help burn fat and promote restful sleep.
  • Stimulant-free.
  • Contains 200 milligrams of L-theanine.
  • Contains five milligrams of BioPerine.
  • Can help control food cravings.
  • Manufactured in a good manufacturing practice-certified facility.

Does Lean PM Really Work?

You’re not alone if you’re wondering how fat burners like Lean PM work. Many people wonder if the weight loss supplement is too good to be true. Can a fat burner help you get better sleep? Can it help you wake feeling refreshed?

Many satisfied customers have shared their praises for the Lean PM regarding its role in improving their sleep and losing fat. However, Lean PM may work differently than other fat burners on the market. 

Since Lean PM’s formula contains melatonin, it also acts as a sleep-aid supplement. If you can enter a more restful sleep at night, you’re less likely to give in to nighttime food cravings and more likely to reach your calorie deficit goals. 

Notably, research continues to point to a connection between better sleep and weight management.[1] In fact, poor sleep has been linked[2] to decreased glucose intolerance, insulin resistance, and oxidative stress. Plus, disruptions in circadian rhythm can result in weight gain, so a fat burner and sleep aid supplement can help with body weight management.


  • Manufactured in a Good Manufacturing Practice-certified facility.
  • Contains L-theonine and BioPerine
  • Stimulant-free. 
  • Adjustable dose.


  • Not vegan-friendly.
  • Made in a facility with common allergens.
  • Says labs tested, but no third-party lab results are available.

Jacked Factory Lean PM Ingredients

Jacked Factory’s Lean PM is comprised of a short list of ingredients, including green tea leaf extract, melatonin, L-theanine, magnesium, and BioPerine. These active ingredients work together to help you fall asleep faster and maximize night-time fat burning.

Lean PM ingredients, similar to other weight loss supplements, can help suppress cravings and support your pursuit of a calorie deficit. Additionally, the fat-loss supplement stands out among other fat burners by acting as a sleep aid. It can support restful sleep thanks to melatonin, a necessary factor to promote maximum fat burning and weight loss.

Of course, if you buy Lean PM, you must maintain a healthy diet and engage in regular physical activity. Burning fat requires your body to be in a caloric deficit, which is primarily achieved through a well-balanced diet and regular exercise.

Jacked Factory Lean PM Ingredients

Lean PM stands out among the many weight loss supplements and fat burners available today. The night-time fat burner sleep aid is designed to help users burn fat while also reaching deeper sleep. 

The Lean PM formula is formulated to promote maximum fat-burning while achieving better sleep, all in a convenient two-capsule serving. Lean PM’s formula is devoid of harsh stimulants and artificial chemicals. Instead, its all-natural ingredients, in effective doses, can help boost metabolism, maximize fat-burning, enhance mood, suppress cravings, and support a good night’s rest. 

Some of Lean PM’s ingredients, such as the 5-HTP, may also act as an appetite suppressant and help manage food cravings as you try to lose weight. It can specifically help you curb nighttime cravings to limit late-night snacking. The melatonin in Lean PM helps to eliminate opportunities for snacking outside of a calorie deficit by promoting healthy sleep patterns and supporting a good night’s rest.  

The Lean PM night-time fat burner ingredients include:

Vitamin B6

Vitamin B6[3] helps the body produce several neurotransmitters essential for restfulness and mood enhancement. Every serving of Lean PM provides 10 milligrams of this B vitamin.


Lean PM contains 150 milligrams of magnesium per serving. Magnesium[4] is well-known for its roles in relaxation, bone mineralization, protein building, muscle contractions, immunity, and nerve impulse transmission. Magnesium may also relax your muscles, enabling a better night’s rest.

Green Tea Extract

Each Jacked Factory’s Lean PM serving contains 300 milligrams of green tea leaf extract. Since green tea extract has the antioxidant epigallocatechin gallate (EGCG),[5] it is said to help increase your energy and promote fat loss.

EGCG can stimulate fat oxidation by inhibiting an enzyme that breaks down the hormone norepinephrine with a synergistic effect between the caffeine in green tea and the EGCG. However, studies conflict[6] with some saying endurance was not increased in athletes consuming EGCG over and above that achieved by caffeine alone. 

Of note, green tea extract often contains caffeine, which would be considered a stimulant. However, there is no mention that Lean PM contains decaffeinated green tea extract.  


Jacked Factory’s Lean PM contains 200 milligrams of L-theanine per serving, a significant ingredient in promoting sleep. L-theanine is an amino acid often found in green tea leaves that can help encourage restfulness and enhance one’s mood. 


Each serving of Lean PM contains 150 mg of 5-hydroxytryptophan,[7] or 5-HTP, which is an herbal supplement made from the seeds of the African plant Griffonia simplicifolia. It has been used in alternative medicine as a potential aid in treating depression and fibromyalgia. Additionally, despite a lack of research to back the claims, it is also used for binge eating, appetite control (increases the sense of fullness), sleep promotion (increases melatonin production), and headaches, among other uses. 

Other Ingredients


Lean PM contains five milligrams of melatonin,[8] a hormone most known for promoting sleep. It is secreted naturally to help the body understand when it’s time to sleep, but it also a common supplement use to aid sleep patterns by normalizing the circadian rhythm. Its supplemental form can help the body fall asleep faster and stay asleep for longer. 

Because Lean PM contains melatonin, it is not vegan-friendly, as melatonin is typically derived from animal sources. However, Lean PM does come in a melatonin-free option for those who need a vegan-friendly fat-loss supplement.     


Every serving of Lean PM contains five milligrams of BioPerine, a patented black pepper fruit extract that enhances the bioavailability and absorption of other active ingredients.

Alternatives To Lean PM

PhenQ Supplement


See PhenQ Review

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  • Vegan-friendly.
  • 60-day money-back guarantee.
  • Helps support mood, energy, and weight loss.
  • Must take it twice daily.
  • Contains caffeine.


See Phen24 Review

  • 60-day money-back guarantee.
  • Vegan-friendly.
  • Promotes mental focus.
  • Contains caffeine.
Burn Lab Pro

Burn Lab Pro

See Burn Lab Pro Review

  • 30-day money-back guarantee.
  • Vegan-friendly.
  • Gluten-free.
  • Contains proprietary blends.

Health Benefits Of Lean PM

Lean PM benefits include:

  • Sleep aid support.
  • Can help control mealtime and snack cravings.
  • 200 mg of L-theanine to support restfulness.
  • Contains 36% of your daily value of magnesium.
  • Exceeds your daily needs for vitamin B6.
  • Can help burn fat while you sleep.

Additionally, you might consider combining Lean PM with other fat-burning supplements, such as Jack Factory’s Lean-XT or Burn-XT. Combining products may provide a boost in its effects and promote maximum fat-burning. However, before combining Lean PM with any other supplements, talk with your doctor.

Potential Side Effects

While there aren’t many documented Lean PM side effects, fat burners, in general, may cause side effects, such as

  • Allergic reactions.
  • Mood swings.
  • Nausea.
  • Vomiting.
  • Diarrhea.
  • Constipation.
  • Dehydration.

Still, it’s important to note that there is limited research regarding fat burners and their long-term health effects, especially on your heart and liver. It’s also important to note that Jacked Factory implies that its products are tested by outside labs, but there are no third-party labs mentioned, and lab results are not available to consumers on the website.

So before you buy Lean PM, talk with your doctor to ensure the fat burner and sleep aid will not interfere with your current medications.  


The serving size for Lean PM is two capsules, but Jacked Factory recommends starting with half a serving (one capsule) to assess tolerance. Then, after three days, you can increase your dose to the whole serving if appropriate or as otherwise directed by your doctor. 

Even healthy adults should start with a conservative dose and advance as tolerated to the full serving size. You know your body better than anyone else. Be honest with yourself as you assess tolerance and listen to your body’s reactions to the dietary supplement.

And, of course, Lean PM should only be used in conjunction with standard healthy lifestyle habits and only with the approval of a trusted medical professional. Even healthy adults with no medical conditions should discuss the nighttime fat burner sleep aid supplement with their doctor before adding it to their weight loss supplement routine. 

Lean PM Reviews: What Do Real Users Say?

According to Jacked Factory Lean PM reviews from the brand’s website, customers appear to be overwhelmingly satisfied with the product:

This formula is absolutely amazing. I’ve taken other sleep aids before and nothing compares to this one. I actually get deep sleep and feel rested in the morning.

Amanda C.

A quick and effective way to lose weight. It really boosts your metabolism and with a combination of cardio and portion control you will see pounds coming off quickly. Of you have difficulties sleeping as well ot has Melatonin which in return helps you sleep better and longer.

Steven P.

This definitely helps with sleep. I’ve always had trouble falling asleep and getting a good night’s rest, even on workout days. This has been helpful especially since my goal is to ultimately lose weight.

David P.

Final Thought

According to our Lean PM review, this supplement may help you achieve your weight loss goals and get better sleep regularly. In addition, the Lean PM night-time fat burner sleep aid can help you lose stubborn body fat while you sleep. 

Not all fat burners operate under the same mechanisms or contain the same active ingredients. However, effective doses of Lean PM ingredients, such as L-theanine and green tea extract, work together to make the supplement effective. In addition, Lean PM acts like an appetite suppressant by curbing your nighttime food cravings and helping you fall asleep faster. As a result, avoiding late-night snacking makes you more likely to finish your day in a caloric deficit and burn fat.  

It’s essential to consult a medical professional before starting any new dietary supplements, especially weight loss or fat-burning supplements. Furthermore, it’s important to remember that fat burners cannot replace a healthy diet and regular physical activity. To burn fat and lose weight, you must create an energy deficit.

Frequently Asked Questions

What does Lean PM do?

Lean PM is a stimulant-free fat-burning supplement that can also help promote restful sleep. Per our Lean PM review, the weight-loss supplement can suppress appetite while also helping you fall asleep faster, thus helping you enter a calorie deficit ideal for burning fat. 

How do I take Lean PM?

It is recommended that you take one capsule of the two-capsule serving of Lean PM for approximately three days to assess your tolerance level. Then, you can increase your dose to the whole serving as appropriate for your needs.

Is Lean PM stimulant-free?

Yes, this night-time fat-loss dietary supplement is advertised as being stimulant-free. Additionally, it contains five milligrams of melatonin to help you achieve deeper sleep, making it a sleep-aid supplement as well.

Is Lean PM vegan?

Unfortunately, no, Lean PM is not vegan-friendly. It contains five milligrams of melatonin, which is often derived from animal sources. However, if you need a vegan-friendly option, you can try the Lean PM melatonin-free product.

How long does Lean PM take to work?

Everyone responds differently to fat burners, so Lean PM’s effects may vary between individuals. However, Jacked Factory recommends taking half a serving for three days to assess your tolerance level, after which you can increase your dose, leading customers to believe you may notice its effects after three days

+ 8 sources

Health Canal avoids using tertiary references. We have strict sourcing guidelines and rely on peer-reviewed studies, academic researches from medical associations and institutions. To ensure the accuracy of articles in Health Canal, you can read more about the editorial process here

  1. Kline, C.E., Chasens, E.R., Bizhanova, Z., Sereika, S.M., Buysse, D.J., Imes, C.C., Kariuki, J.K., Mendez, D.D., Cajita, M.I., Rathbun, S.L. and Burke, L.E. (2021). The association between sleep health and weight change during a 12-month behavioral weight loss intervention. International Journal of Obesity, [online] 45(3), pp.639–649. doi:10.1038/s41366-020-00728-8.
  2. Sleep Foundation. (2020). Why Is Sleep Important to Weight Loss? | Sleep Foundation. [online] Available at: https://www.sleepfoundation.org/physical-health/weight-loss-and-sleep
  3. National Institutes of Health (2017). Office of Dietary Supplements – Vitamin B6. [online] Nih.gov. Available at: https://ods.od.nih.gov/factsheets/vitaminB6-healthprofessional/.
  4. Nih.gov. (2013). Office of Dietary Supplements – Magnesium. [online] Available at: https://ods.od.nih.gov/factsheets/Magnesium-HealthProfessional/
  5. PubChem (2023). (-)-Epigallocatechin gallate. [online] @pubchem. Available at: https://pubchem.ncbi.nlm.nih.gov/compound/Epigallocatechin-gallate
  6. Dean, S., Braakhuis, A. and Paton, C. (2009). The Effects of EGCG on Fat Oxidation and Endurance Performance in Male Cyclists. International Journal of Sport Nutrition and Exercise Metabolism, [online] 19(6), pp.624–644. doi:10.1123/ijsnem.19.6.624.
  7. https://www.facebook.com/Drugscom (2022). 5-HTP. [online] Drugs.com. Available at: https://www.drugs.com/mtm/5-htp.html
  8. NCCIH. (2014). Melatonin: What You Need To Know. [online] Available at: https://www.nccih.nih.gov/health/melatonin-what-you-need-to-know
Chelsea Rae Bourgeois

Medically reviewed by:

Kathy Shattler

Chelsea Rae Bourgeois is a Registered Dietitian Nutritionist with a background in fitness and athletics. She has worked as a dietitian in the clinical setting for the past seven years, helping a wide variety of patients navigate their health through nutrition. She finds joy in sharing her passions through her freelance writing career with the hopes of helping people embrace their health and live their lives to the fullest.

Medically reviewed by:

Kathy Shattler

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