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T5 Fat Burners

T5 Fat Burners claim to be thermogenic. This suggests they help you lose weight while obtaining an increase in energy. However, most T5 Fat Buners contain ingredients which may lead to unpleasant side effects.

Below we have reviewed T5 Fat Burners against our review criteria to help consumers make an informed decision.

T5 Fat Burner review

T5 Fat Burners Pros
  • Some clinical studies on ingredients back-up product's claims
  • Sold by numerous retailers therefore widely available to purchase
T5 Fat Burners Cons
  • Severe side effects associated with some of its ingredients
  • Some key ingredients lack in-depth research

T5 Fat Burners are marked as ‘Rejected’ as they fail to meet our ‘Approved Criteria’. Manufacturers of T5 Fat Burners rarely give their products money-back-guarantees and there are no mention of manufacturing standards.

T5 Fat Burners Review

The T5’s were previously based on the ECA Stack drugs, which consisted of ephedrine, caffeine and aspirin. The ECA Stack drugs were used by bodybuilders, as they claimed to be effective at building up lean muscle definition. However, due to the ban of ephedrine, T5’s have replaced this with bitter orange, making them differ to the original ECA Stack.

Each brand of T5 Fat Burners states that by taking their product you will lose weight quickly. They also claim that you can experience an increase in energy, making exercise less of a chore.

T5 Fat Burners Claimed Weight-Loss Benefits:

T5 Fat Burners claim to have fat burning, appetite suppressing and metabolism boosting properties.

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How T5 Fat Burners Work


T5 Fat Burners were originally created in the image of the ECA stack drugs, which contained Ephedrine, Caffeine and Aspirin. Ephedrine is a synthetic form of the banned ephedra, ephedrine’s part in the ECA stack is to stimulant and speed up the body’s natural processes such as the metabolism. The caffeine is also a stimulant with a diuretic effect, the main purpose for caffeine in the ECA stack is to increase the effects of ephedrine on the body. Aspirin’s role is to keep the ephedrine in the system longer, which prolongs ephedrine’s stimulating effects on the body.

Body builders originally used ECA stack drugs, however when it was discovered to have weight loss and appetite suppression affects it soon caught the attention of the diet pill world. However since Ephedrine became banned in weight loss diet pills, T5 fat burners were no longer able to use this ingredient, still wanting a similar effect in the product, like many other ephedra free products, the manufacturers of T5 fat burner brands looked to Citrus Aurantium (Bitter Orange extract).

Firstly, T5 Fat Burners claim to be thermogenic fat burners, which in theory means they allow you to burn more calories, as it increases energy and blood flow, which boosts metabolism and slightly increases body temperature. This supposedly all results in effective fat burning and weight loss. They also claim to give you an extra energy boost while you work out. T5 fat burners also claim to have a vasodilatation effect, this effect increases the rate your blood travels around your body and reaches muscle more efficiently. Due to the extra blood flow to your muscles, you can achieve more strength and improve cardiovascular endurance (strength of heart).

T5 fat burners are said to work best if you take as part of a healthy diet and exercise routine.

There are many T5 fat burners out there made by different manufacturers, each with their own promise of success and different varieties and quantities of ingredients. However many of these T5 fat burner brands normally contain these four ingredients, which are Bitter Orange, Caffeine Anhydrous, Guarana Seed and Green Tea extract. So let’s look further into these common ingredients to see how exactly they can help you to lose weight, and increase energy.

Bitter Orange
Bitter Orange also known as Citrus aurantium was added to replace Ephedrine. It contains an active compound called synephrine, which is like ephedrine. It is thought to be as effective as ephedrine for boosting metabolism and suppressing appetite. The peel, flower, leaf, fruit and fruit juice have been used for medicines for a long time, but recently Bitter Orange has become a popular ingredient in weight loss supplements. This replacement for ephedrine however isn’t necessarily safer due to its stimulant like effects.

Caffeine Anhydrous
This is a dry powder form of caffeine. Caffeine is known to be a central nervous and metabolic stimulant with diuretic effects. Some studies have shown that caffeine can increase alertness, focus and suppress your appetite. Caffeine has a thermogenic effect on the body, which is the increase in calories burned due to heat output. For those who exercise regularly caffeine has been known to help you exercise longer.

Caffeine 538

Found in the Amazon rainforest, it is said to contain more caffeine than in coffee. The high dose of caffeine gives you extra energy, and other benefits such as better alertness and mood. As well as caffeine Guarana seed also contains theophylline and theobromine, which are from the same chemical family as caffeine. It also contains tannins, starch and polyphenols. Together the caffeine and theobromine cause a thermogenic effect, which help you to burn calories or fat via increasing heat output. They both also are diuretic agents, which help you to lose water weight, only if you have water weight to lose.

Green Tea
Green Tea is known for its wide health benefits. In regards to weight loss, Green Tea can help you reduce fat, stimulate metabolism and improve endurance during exercise. To help you reduce fat the polyphenols in Green Tea activate a certain enzyme in the body, which dissolves excess triglycerides (synthesized sugar and fat), this process helps reduce fat content in your body. Green Tea can help stimulate the metabolism by the combination of caffeine and an antioxidant called EGCG (Epigallocatechin gallate), together they have the ability to stimulate the body’s metabolism and speed up weight loss. It does this via thermogenesis; both ingredients stimulate the nervous system and release the fat into the blood stream. Finally, the catechin polyphenols found in Green Tea stimulate muscle cells and the liver to use more fatty acids, which leave the carbohydrates free for energy during your workout.


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Different Brands of T5 Fat Burners

There are many different T5 Fat Burners out there, all offering promising effects. One example of this is the Forza range, which is a well-known T5 fat burner brand. Learn more by reading our article on the different T5 Fat Burner brands.

Key T5 Fat Burners Ingredients

bitter orange peel in t5 fat burner

While many of the T5 Fat Burners use different ingredients, with none being identical, there are certain ingredients that you are likely to find in the majority of the T5 Fat Burner Brands. These ingredients are bitter orange, caffeine anhydrous, green tea and guarana. Bitter orange was added to replace the banned ephedrine; it is thought to be as effective for boosting metabolism and suppressing appetite. There have also been clinical studies to prove the effectiveness of bitter orange in regards to weight loss.

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Clinical Studies

Clinical Researcher 538

Due to there, being so many different brands and versions of T5 fat burners, there isn’t a clinical study that looks at them as a whole. There have however been tests done on the common ingredients in T5 fat burners and there is also a clinical trial that looks into how several of these ingredients work together.

Bitter Orange Clinical Studies

There have been many clinical studies showing the effects of Bitter Orange on weight loss. One of these studies titled ‘Blood pressure and heart rate effects following a single dose of Bitter Orange’, looked into the effects Bitter Orange had on Blood pressure and heart rate after a single dose in healthy adults. 15 young adults were given either a single dose of Nature’s Way Bitter Orange or a placebo with a one-week wash out period. Results showed that blood pressure and heart rate were higher for up to 5 hours after the dose versus the placebo group.

Another study titled ‘Antiobesity and cardiovascular toxic effects of Citrus aurantium extracts in the rat’, showed that in the rats that were tested as well as the anti-obesity effects of Bitter Orange there was also a toxic effect which is thought to be due to cardiovascular toxicity, this means it has damaging effects on the heart or blood systems.

Caffeine Anhydrous Clinical Studies

Caffeine is a common ingredient in many diet pills; we have often looked into caffeine and its many clinical studies that research the effects of caffeine on weight loss and boosting energy. One study titled ‘Caffeine ingestion, affect and perceived exertion during prolonged cycling’, looked into caffeine’s effect on how a person feels during a long workout session. To test this 12 endurance trained men, after an over night fast were given caffeine 1 hour before doing 90 minutes of cycling. The results showed that compared to the placebo group those who took caffeine had a more positive experience while exercising.

Guarana Clinical Studies

Many of the benefits of Guarana is due to its high caffeine content, caffeine has been thoroughly tested over the years to prove the benefits, even though there are still some doubts. There hasn’t been many clinical trials done on Guarana to prove its effectiveness in regards to losing weight and increasing alertness. However there has been a study done titled ‘A double-blind, placebo-controlled, multi-dose evaluation of the acute behavioural effects of Guarana in humans.’ this study looked into the effects different amounts of Guarana had on mood and cognitive effects on humans. The results of this study showed that mood was improved but the lower doses of Guarana had better effects than the higher doses.

Green Tea Clinical Studies

The benefits of Green Tea are widely known, it has been involved in many clinical studies. One of these studies titled ‘Efficacy of a Green Tea extract rich in catechins polyphenols and caffeine in increasing 24-h energy expenditure and fat oxidation in humans’, looked into whether Green Tea had an effect on energy expenditure and fat oxidation, this is the process of fat being converted into a useable form of energy, in humans. In this study, subjects were randomly put into three groups: Green Tea, Caffeine and Placebo. The results of this study showed that the benefits of Green Tea aren’t solely due to the caffeine, and that Green Tea can improve energy expenditure and fat oxidation.

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Bitter Orange, Green Tea and Guarana Clinical Study

There has been a study done on a weight loss supplement that contained Bitter Orange, Green Tea and Guarana. The study titled ‘Metabolic and physiological effects of ingesting extracts of Bitter Orange, Green Tea and Guarana at rest and during treadmill walking in overweight males’ looked into the metabolic rate and substrate utilisation (how body burns fat and carbohydrates) in overweight men during rest and exercise. The results from this study showed no significant results concerning metabolic rate and substrate utilisation.

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T5 Fat Burners Side Effects


Due to the different brands and each brand containing different ingredients and amounts, the side effects of T5 Fat Burner cannot be known, unless each brand is clinically tested. However, due to many of the T5 fat burners containing similar ingredients we can look into each ingredient and see what possible side effects you could experience.

T5 fat burners normally contain Bitter Orange, Caffeine Anhydrous, Guarana and Green Tea. So let’s look into each of these ingredients for possible side effects.

Bitter Orange

Bitter Orange is safe when it is taken in amounts that you find in food such as an orange. However, it is possibly unsafe when taken as a weight loss supplement, especially when it is taken with caffeine. The problem with Bitter Orange is due to it containing the chemical synephrine, which is similar to ephedrine; the FDA has banned this for use in diet pills. Due to the effects synephrine has on the body, you could experience raised blood pressure, fainting and even a heart attack. Other side effects include headaches, migraines and cluster headaches.

Caffeine Anhydrous

This is safe for most adults as long as it’s not misused, but caffeine can cause insomnia and anxiety. In large doses, you can experience headache and chest pain. Caffeine is known to increase the effects of ephedrine, so with Bitter Orange being similar you need to be careful with T5 Fat burners that contain both.


The side effects of Guarana seed are similar to caffeine due to its high caffeine amount. Some of the known side effects include sleep problems, anxiety, and restlessness, upset stomach and quickened heartbeat. Long-term use of this supplement may lead to tolerance and dependency.

Green Tea

Green Tea is safe for most adults; however, some can experience upset stomach and constipation. Green Tea due to it containing caffeine can become unsafe if more than 5 cups are drunk. There have also been reports that Green Tea extract supplements could cause liver damage and might make liver disease worse.

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Where to Buy T5 Fat Burners

You can either buy them from their own official website or Amazon, they are available from eBay but it isn’t advised that you get them from there due to concerns of fake tablets or some even containing ephedrine. Prices can range from £18 to £40, depending on brand and type.

Nearly all T5 fat burners have an official website. The Forza brand of T5 fat burners can be brought from their Forza supplement website, which is the retail side of the Forza industries. There is a range of T5 fat burners, some such as the FORZA BLACK T5 2012 – Prototype Extreme Fat Burner, which claims to be the strongest and most effective. Prices vary from £18 to £37.

Desirable body also do their own range of T5 fat burners, which can also be brought from their website. There are also many different types available, each claiming to be effective in its own way. One of these called Re:Active T5 Black + Acai Fat Burner uses acai to help detox your body. Prices here range from £27 to £32.

There are many T5 fat burners available from Amazon including Re:Active T5 Super strength slimming pills for £18 and Forza T5 Black heat-extra strong fat burners with capsaicin for £33. You do however have to be careful which ones you buy from this website, because there are many fake T5 fat burners going around. So for your own safety, research thoroughly before buying a brand and check our website for our verdict on the product.

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Overall Verdict

Whilst some of the common ingredients in T5 Fat Burners are supported by some clinical evidence, some also come with an extensive list of unpleasant side effects. It is important to note that different variations of the product will contain different ingredients so it is important that you read up on the product’s ingredient list before purchasing.

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14 responses to “T5 Fat Burners”

  1. Fiona says:

    Since taking T5 I have suffered bad skin, acne all over my face and neck?! Is this normal????

  2. Maurice says:

    I have tried the T5 Fat Burners and detox pills for over 2 weeks with zero difference. I have exercised every day and gained 2lbs. What’s that all about?

  3. Jodie says:

    I have tried the T5 black super strength fatburner but found it had no effect what so ever. I started with one then two and even went up to five in one go but did not notice a single thing.. Do not waste your money.

  4. Stephen says:

    This T5 FAt burners product should not be marketed as a diet pill. It does not work for that purpose . It may well be beneficial for folk who are going to the gym every day, and give them more energy etc., to allow them to build muscle and lose fat, (which they are probably doing at the gym anyway?!) but they do not work AT ALL as a diet pill. All they gave me was serious heartburn/acid indigestion, and I didn’t drop one pound, over two weeks even though I watched what I ate.Do not waste your money.

  5. LL says:

    Tried these.. How stupid to waste my money, they do not work, complete CON !!!

  6. Danielle says:

    I have been taking T5s by biogen health science along with the patches for 8 week’s with no exercise but I have two small children and a busy house! I lost 7lbs in my first week and have been losing 2-3lbs each week thereafter, however this week I seem to have plateaued. Maybe my body is getting use to them, I dunno? I have tried others to lose my baby weight, some have not even done anything apart from give me a bad head but these seem to work for me. I guess everyone is different though!

    • Ty says:

      I have two small children who is 1 & 4 months and I’m trying to lose weight including my baby fat… Does these pills work? & which one are you using if I may ask.

      • sarah says:

        I’m using T5 by desirable body and yes there working ….I recommend you drink plenty of water and very little tea coffee and caffeine drinks as you may feel over whelmed with caffeine. …do not take after six pm either if you wanna sleep! These tablets stop cravings but not your appetite they just decrease it allowing you to drop the pounds …affordable and yes they do work!!! Fast delivery too 10/10 from me

  7. William Tips says:

    I like too loos my diebetic weight, My weight is 350. Can you help me?
    William Tips

  8. Mrs S says:

    I have slimmest t5 and just took one this morning and my head is in absolute agony!

  9. laura con says:

    I have been using various fat burning capsules for a while now and I can actually see the difference between good quality and poor quality supplements.

    I am somewhat active but I have watched my belly get bigger and bigger. I am working in an office so I am sitting all day. I am not fat, my BMI is ok-ish, but all fat stays on my belly. I now ONLY use the Lady Soma Detox. I have noticed a major difference in my metabolism and I can already see changes in my belly size. No weird side effects.

  10. laura says:

    These t5 in red bottle are dangerous my partner had a sudden cardiac arrest and died I managed to give him cpr and save him I also know another person taking the same tab but was unlucky and did not make it these should be banned and are taking peoples loved ones absolutely devastatingly outcome

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