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T5 Rapid Burner By Slim Zest Review

Few supplement companies from the Uk have tried creating fat burning supplements, but Slim Zest have given it a fair attempt.

It contains some useful ingredients, but looking closer, they have added one ingredient that has some controversy over how safe it is.

Let’s have a closer look and see if it’s the right fat burner for you. 

Benefits of T5 Rapid Burner

  • Vegetarian Capsules
  • Energy Booster
  • Adrenaline Booster

The mid-range fat burner is filled with stimulants and adrenaline boosters that will be sure to give you the added kick in the gym.

Raising the adrenaline levels will be sure to increase the calories you burn, but my question always is…“how long can you run from a cheetah in the jungle?” Let me quickly explain –

Adrenaline is used for moments when we need intense bursts of energy. In our bodies, we have a limited supply of this hormone “adrenaline” – excessive release of adrenaline will eventually make us feel worn down.

It looks like this Fat Burner is really a Pre-Workout in disguise – But first, let’s have a look at the ingredients and what they do before jumping to conclusions.

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A Closer Look – What’s Inside

L-Tyrosine – A basic amino acid that’s used to increase mental and physical performance in the gym.

Caffeine Anhydrous Pure – Is a manufactured form of caffeine that will help boost you through workouts and help to increase your metabolism helping you to burn additional fat.

Naringin – Also known as Grapefruit. Naringin has been said to cut through fat in the body by releasing fatty acids along with increasing the metabolism. However, actual human studies to prove this are limited.

L-Tryptophan – Is used said to help relax the nervous system, along with helping to relieve the symptoms of insomnia.

Citrus Aurantium – Also known as Bitter Orange Peel. This ingredient will increase your adrenaline levels and provide you with a large boost of energy – However, it’s been linked to many unwanted side effects, especially when mixed with caffeine as they have done with this supplement.

Gree Tea Extract – A great all rounder that’s full of catechins which help to burn additional fat and prevent the build-up of glucose in the liver. It will also help to raise your metabolism.

Pyridine Hydrochloride – In other words, Vitamine B6. B vitamins are essential for overall health and wellbeing. B6 will help your metabolism to work effectively while on a lower calorie diet along with supporting your immune system.

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Side Effects of T5 Rapid Burner

Like all supplements containing adrenaline boosters and stimulants such as caffeine and Bitter Orange Peel they must be taken with caution.

Side effects include dizziness, anxiety, vomiting and nervousness when mixing these two ingredients together.


  • Relatively cheap.
  • Contains Green Tea.


  • Contains Bitter Orange Peel.
  • Mixing adrenaline boosters and caffeine together can cause unwanted side effects.
  • Lack of natural thermogenic ingredients.

How To Use

It’s advised to take one capsule a day and only increase dosage if required. For best results take before a workout but not after 3pm.

Where Can I Buy It?

You can buy it from and their home page at

How Much Does It Cost?

£14.99 or $18.34 USD for 60 capsules

My Verdict

The Uk company Simply Zest has made a decent effort in trying to create a cheaply priced mid-range fat burner with some ingredients that have been shown to create more energy while increasing the metabolism.

In my opinion, they have failed to do their research when it comes to the science of fat burning. They have missed vital ingredients such as Cayenne Pepper, and Peperine, which are bothe great thermogenic to help fat loss naturally without over stimulating.

They have also mixed Bitter Orange Peel with Caffeine which has been known to cause anxiety, heart palpitations and nervousness. See our best ingredients list here to avoid this.

Overall, this is more of a Pre-Workout than a Fat Burner.

  • Good: It’s cheap and it can improve energy levels for short periods of time
  • Bad: Too many stimulants and not enough fat burning ingredients
  • Bad: Mixes together Bitter Orange Peel and Caffeine which have cause side effects in many.
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David Watkins
Hey! David here the creator of HigherLevelLifter. Here you'll find loads of info on the safest and most effective supps available. Any questions, just hit me a DM. David W.

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