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Faction Labs Deficit Review - The most comprehensive fat burner?


Deficit by Faction Labs is an excellent option for those seeking a comprehensive weight loss product. Nevertheless, it may not meet the expectations of those searching for all-natural ingredients or cost-effective options.

Category Scores

Nutrition & Directions

Taste & Texture

User Data

Value for Money


  • Good flavour
  • Great formulation and effects
  • Awesome label transparency - no ridiculous claims


  • Not ideal for people on a tight budget
  • Isn't considered to be a ‘natural' product


The alluring and enticing label may draw you towards the product initially, but does the actual formulation and effects live up to the initial expectations set by its appearance? Our review will reveal the answer.

Nutrition & Directions



We have divided our information into two parts - first, we will determine if the ingredient is properly dosed and second, we will explain the purpose of the ingredient in the supplement formula. Let's dive right in.

Acetyl L carnitine (ALCAR) 2000mg

  • Adequately dosed? Yes.

  • Function: ALCAR is involved in the metabolism of fatty acids, as it helps transport long-chain fatty acids into the mitochondria, where they can be burned for energy. Some studies have suggested that supplementing with ALCAR can increase energy levels, boost fat metabolism, and promote weight loss.

Acetyl L-Tyrosine 500mg

  • Adequately dosed? Yes, but it's considered to be the minimum effective among sports supplements. I like seeing L-tyrosine doses that range between 1000mg-2000mg per serve.

  • Function: Acetyl L-tyrosine can improve cognitive function, especially in situations that involve stress or fatigue. In addition, it may improve mood by increasing neurotransmitters in the brain, such as dopamine and norepinephrine.

Alpha GPC 250mg

  • Adequately dosed? No. A typical and efficacious dose of Alpha GPC is 300 mg-800 mg. Although, I've seen doses as high as 1200mg in some research.

  • Function: Alpha GPC may help improve cognitive function by increasing the levels of acetylcholine in the brain, which is a neurotransmitter involved in memory and learning. It's also been shown to improve athletic performance by increasing power output and reducing fatigue in some research.

Caffeine Anhydrous 250mg

  • Adequately dosed? Yes. 250mg is a moderately high dose for most people.

  • Function: Caffeine improves athletic performance by increasing energy levels and reducing fatigue. From a purely fat-loss perspective, caffeine can suppress appetite and enhance fat oxidation, which is the process of breaking down fat into energy.

Green Tea Extract 150mg

  • Adequately dosed? No. Green tea extract has an efficacious dose of 200 to 500mg per day. It is also preferably taken in divided doses throughout the day.

  • Function: Green tea extract is rich in antioxidants, specifically a group of compounds known as catechins, which are believed to have several potential health benefits, including increasing fat oxidation, reducing appetite and improving insulin sensitivity.

Ashwagandha 100mg

  • Adequately dosed? No. Whenever ashwagandha is used in pre-workouts or fat burners, it's typically used in a 300 to 500mg dose.

  • Function: Ashwagandha is an adaptogenic herb, which means it can help the body adapt to stress, both physical and mental. Ashwagandha has also been studied for its potential to enhance physical performance, such as increasing strength and endurance, reducing muscle damage and fatigue, and promoting faster recovery after exercise. Some research suggests that ashwagandha may have beneficial effects on reducing stress and anxiety, improving mood, and promoting overall well-being, which can enhance a person's workout experience.

Theobromine 100mg

  • Adequately dosed? Yes. A typical dose of Theobromine ranges between 50 - 250mg.

  • Function: Theobromine is a compound that is sometimes included in pre-workout supplements for its potential effects as a mild stimulant and vasodilator. It may help to increase blood flow to muscles, enhance alertness and mental focus, and reduce fatigue during exercise.

L-Theanine 100mg

  • Adequately dosed? Yes, if the purpose is for cognitive enhancement. The recommended dosages for these benefits are as follows: For stress reduction and relaxation, 200-400 mg per day, and for cognitive enhancement, 100-200 mg per day.

  • Function: L-Theanine is most notably used with caffeine or other stimulants to reduce jitteriness. However, it is also commonly used to improve cognition and reduce stress or anxiety symptoms.

Dandelion Root Extract 100mg

  • Adequately dosed? Yes - with a caveat. If taking dandelion root extract for the diuretic effect, you'll want to consume 100-200 mg 2-3 times per day.

  • Function: Dandelion root extract is known for its diuretic effect, which means it can help increase the removal of excess fluid from the body.

Green Coffee Bean Extract 50mg

  • Adequately dosed? No. The efficacious dose of green coffee bean extract is 150-300mg in most thermogenic products.

  • Function: One of the main reasons green coffee bean extract is used in supplements is for weight loss. Some studies have suggested that chlorogenic acid can help reduce the absorption of carbohydrates and increase the metabolism of fat, which may lead to weight loss.

Juniper Berry Extract 50mg

  • Adequately dosed? No. If the purpose of using juniper berry extract is as a diuretic, it appears to be underdosed, as the standard dose is 100-200mg.

  • Function: In this context, Juniper Berry Extract looks to be used as a diuretic.

Synephrine 30mg

  • Adequately dosed? Yes, the typical dose is 20-30mg per day

  • Function: Synephrine is a stimulant that is commonly used in sports supplements for its potential to increase energy and endurance, as well as to support weight loss. It is structurally similar to ephedrine, and some evidence suggests that it may have similar effects, such as increasing metabolic rate and reducing appetite.

Pterostilbene 25mg

  • Adequately dosed? No, a typical dose is 50 - 250mg per day.

  • Function: Pterostilbene is a compound commonly used in sports supplements for its potential to enhance cognitive function and support cardiovascular health by lowering LDL cholesterol.

Hordenine 25mg

  • Adequately dosed? Yes, a typical dose is 25 - 50mg per day

  • Function: Hordenine is a naturally occurring compound found in plants, often included in sports supplements for its potential effects as a stimulant and weight loss aid. It may help to enhance energy, focus, and mood, while also suppressing appetite.

Grapeseed Extract 25mg

  • Adequately dosed? No, a typical dose is 100-300mg per day.

  • Function: In sports supplements, grapeseed extract is often used for its potential to support cardiovascular health, boost immunity, and enhance athletic performance. Some research suggests that grapeseed extract can help improve blood flow, reduce inflammation, and support healthy circulation, which may enhance endurance and recovery from physical activity.

Lean GBB (Gamma Butryobetaine): 10mg

  • Adequately dosed? No. A typical dosage of Lean GBB ranges from 15 – 30mg.

  • Function: It is a precursor to carnitine, which is an amino acid that helps the body produce energy by transporting fatty acids into the mitochondria. It's also the ingredient most likely responsible for making you feel sweaty during your training sessions.

Grains of paradise 30mg

  • Adequately dosed? Yes. A typical dose is 30-60mg per day.

  • Function: Grains of Paradise, also known as Paradoxine, is a plant extract that is commonly used in sports supplements for its potential to increase thermogenesis, or the body's production of heat, which can help with weight loss. Some research suggests that paradoxine can also have beneficial effects on metabolism, insulin sensitivity, and appetite control.

Bioperine 5mg

  • Adequately dosed? Yes. The recommended dose of Bioperine can vary depending on the product and the individual. However, a typical dose is 5-10mg per day.

  • Function: Bioperine is a proprietary form of black pepper extract that is commonly used as a bioavailability enhancer in sports supplements. Bioavailability refers to the amount of an active ingredient that is absorbed by the body and becomes available for use.

Chromium Picconiate 100mcg

  • Adequately dosed? Yes. A typical dose is 100-400mcg per day. It's important to note that more research is needed to determine the optimal dose.

  • Function: In sports supplements, chromium picolinate is often used to support weight loss, improve insulin sensitivity, and enhance athletic performance. Some research suggests that chromium picolinate may help reduce food cravings, support healthy weight management, and promote fat loss, which may be beneficial for athletes and active individuals.

In general, Faction Labs has put in a reasonable effort to create a comprehensive fat burner supplement. They’ve included ingredients to support fat metabolism, energy production, decrease water retention, improve mood and cognition, and reduce appetite and cravings, which are all key factors that I look for in a fat burner. But unfortunately, more than half of the ingredients are underdosed. I find this to be a bit disappointing because if these ingredients were properly dosed, I would have easily given this product a higher rating.

However, there’s one other thing that I need to point out, which is that the product contains sucralose, an artificial sweetener, and Brilliant Blue which is a synthetic colouring agent. Whilst many people probably don’t mind the artificial sweetener and colours, I'd prefer it if it contain natural sweeteners and natural or no colours. But that's all a matter of preference.

Anyway, moving on to address the practical “effects” of the product. Here’s my experience:

A mere few minutes after taking Deficit, I experienced an unexpected surge in my mood and motivation for my workout. Despite my usual dislike for cardio, I felt eager to get to the gym.

Once I arrived, I jumped on the stair climber machine and got to work. The most important takeaway from this review is that Deficit delivers on its energy and stimulant promises. My mood remained elevated, and my energy levels remained consistent throughout my 45-minute cardio session. It's worth mentioning that Deficit also makes you sweat profusely, so be sure to bring an extra gym towel if you plan on using it.

Taking into consideration both the ingredients and the results of the product, I would rate it an 8 out of 10. As previously mentioned, if the dosages of the ingredients were dosed to their maximum efficacy, I would give it a perfect score of 10 out of 10.

Score: 8/10

Label Transparency

I appreciate how Faction Labs has avoided making exaggerated claims on their packaging to grab attention. Instead, they have opted for a simple design with eye-catching artwork and clear, informative text. Even their instructions recommend starting with half a serving to establish one's tolerance level. It's great to see a brand taking care of their customers like this. Faction Labs definitely deserves high marks for this approach.

Score: 5/5

Directions & Servings

Faction Labs recommends mixing one scoop (8g) with a large amount of water - 800 ml to be exact. You might think that's excessive, but there's a reason behind it. In Australia, there are regulations on the maximum amount of caffeine allowed in a standard serving of a beverage, which is 320mg/L. To comply with these regulations and ensure safety, Faction Labs chooses to dilute their product with a larger amount of water.

Score: 5/5

Taste & Texture


Flavour Options

Deficit currently comes in 7 flavours, which is slightly above average when it comes to flavour options in the thermogenic/fat burner category.

Score: 4/5


I lucked out and managed to get my hands on sample packets of all the Deficit flavours, allowing me to provide an honest review of each.

However, it's worth noting that the flavours are highly concentrated and sweet, so if you're not a fan of sweetness, you might want to consider using a little more water than recommended or trying a different product.

Here's my rundown of each flavour:

  • Raspberry Soda: Tastes like liquified red-frog lollies, with a strong sweet, strawberry and raspberry candy flavour that effectively masks the taste of the amino acids and stimulants.

  • Passionfruit: It doesn't taste like the fruit at all, but instead has a sweet, floral, and slightly tangy flavour that's pleasant but not quite what you might expect.

  • Bubble gum Ice Cream: This unique flavour is reminiscent of bubble-gum ice cream when mixed with very cold water. It's not an everyday drink, but it's a fun addition to my rotation of thermogenics.

  • Vanilla Cola: This flavour goes down smoothly when mixed with ice-cold water. In fact, I'd go as far as to say that it's pretty identical to drink a glass of cold, flat, vanilla cola.

  • Pine-Orange: This flavour has subtle hints of both pineapple and orange, but I feel it would taste even better with a bit more citrus kick.

  • Kiwi Mango: Personally, I find this flavour overly sweet and couldn't finish the drink. It does taste like candy mango and very faintly of mango. However, the sweetness is too overpowering for my taste.

  • Sherbet: There's a definite lemon flavour present, but it doesn't taste like sherbet at all. It's also extremely sweet, and I wish they had added some acidity to the flavour profile.

Overall, the flavours are good but very sweet. The most impressive thing is how effectively they mask the bitter aftertaste of the stimulants in the formula. Most of the flavours taste true to their names, except for passionfruit and sherbet. I'd give the top 5 flavours a rating of somewhere between 8 or 8.5 out of 10. Whereas the bottom two flavour would probably score a 7 out of 10 in my books.

Score: 8/10

User Data



Deficit is one of the more popular products in the fat loss category and its popularity is on the rise.

Score: 4/5

Value for Money


Price Range

Deficit is priced at $1.99 per serve, which is in line with the average price of a fat burner product. Considering the ingredients, effects, and positive brand sentiment, I believe it's a reasonably priced product. I would recommend it to my family and friends and suggest purchasing a twin pack to save money.

Score: 6/10


So, who's this product for?

  • Individuals who're seeking a fat burner that offers energy, mood enhancement, and appetite suppression.

  • Individuals who enjoy delicious and unique flavours

  • People that love to support local (Australian) brands.

Who this product isn't for:

  • It's not recommended for those seeking all-natural products.

  • People that are sensitive to products with moderately high-strength stimulants

  • Individuals on a tight budget

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