Fireball Labz - Jawbreaker

Ingredients 6/10
Effectiveness 7/10
Value for Money 6/10
Taste & Mixability 6/10

Ingredient Profile

Ingredients 6/10

L-Citrulline – 4.5g is a decent dose of pure L-citrulline which has shown increases in nitric oxide although I believe Citrulline Malate is superior as it is shown to also reduce fatigue and muscle soreness. See comparison article HERE!

L-Arginine AKG – 2g is a decent dosage although research suggest 3+ is optimal, although these studies are arginine alone and not in combination with Citrulline. Arginine will aid Citrulline in increasing nitric oxide production.

N-Acetyl L-Tyrosine – 1g is the average dose found in preworkout supplements to improve cognition and focus whilst reducing stress and blood pressure. The N-Acetyl version of L-Tyrosine is most popular in preworkouts since it is more water soluble and mixes better than standard L-Tyrosine, although up to 60% of the N-Acetyl version has been shown to be excreted in urine showing lower bio-availability.

Taurine – 1g is a good dose which is included in most supplements but benefits can be noticed up to 2g. Research shows benefits with blood flow, increase anaerobic capacity with no effect on heart rate or blood pressure.

Choline Bitartrate – Reportde to have cognitive and stimulatory benefits as well as liver detox benefits. 500mg is a good dose for general health benefits although more research is needed to support the performance and cognitive benefits.

Caffeine – Increased energy, gym performance, reduces fatigue whilst improving focus. 300mg is a fairly hefty amount of caffeine, its not too stim crazy where you feel off your head and wired but you definitely feel energy enhancement with a nice sustained energy release without the crash.

Rhodiola Rosea – Research shows significant reduction in fatigue as well as improved cognition. Slight stim effects can also be experienced. Usage of rhodiola as a daily preventative against fatigue has been reported to be effective in doses as low as 50mg so 300mg is an effective dosage.

Green Tea Extract – A mild stimulate with various antioxidant and fat burning properties whilst also showing signs of improved blood flow. Also touted as a cancer preventative in higher dosages and great for overall health and wellbeing.

L-Theanine – A relaxing agent (without sedative benefits) with mild focus enhancement, often used in preworkouts to work synergistically with caffeine as it takes the “edge” off the caffeine content whilst still giving its performance benefits. 200mg dosage is inline with research shown to improve focus and alertness alongside 200mg caffeine.

Willow Bark Extract – Similar structure to aspirin with regards to blood thinning. Also, an effective anti-inflammatory which can aid in pain and stress reduction. The combination with caffeine & green tea has been shown to have fat burning properties whilst making caffeine more potent.

Ginkgo Biloba – 140-240mg is shown to increase cognitive function so the inclusion of 200mg is a good dose in line with research.

Panax Ginseng – Shown to improve cognition, erections and general wellbeing whilst improving insulin sensitivity. Research suggests up to 400mg to improve cognition with 200mg in Jawbreaker.

Thiamin – 100mg may be helpful in preventing or accelerating recovery from exercise induced fatigue.

Vitamin C – Antioxidant properties shown to reduce muscle soreness and improve recovery. One study indicate it could make exercise easier, reducing hard rate, fatigue and perceived exertion.

Grains of Paradise – Early resaerch has demonstrateed a number of unique beenfits of this ingredient at 30-40mg including anti-inflammation & improved energy expenditure. Potentially a negative when we need immflamation for muscle growth.

Vitamin B6 – Important Vitamin to maintain red blood cell ratio, it has also been shown to improve performance as well as other general health benefits.

Vitamin B3 (Niacin) – Shown in research to improve brain function, vascularity, aid joints, lower LDL and increase HDL. Suggested dosage for men in research is 14mg+ with Jawbreaker including a decent dose at 15mg.

Bioperine – Simply put, this component helps improve nutrient absorption for better overall results. Any time a bodybuilding supplement has this, it’s a great bonus.


Effectiveness 7/10

The energy and focus you get from Jawbreaker is definitely is key selling point although I think it lacks research backed doses of pump ingredients which for me are more important as these improve blood flow and nutrient delivery in turn improving growth and recovery. There is a solid formulation of CNS stimulants in this prewokout which you definitely notice and maintain for a solid 2 hours before you start to come down, however its more of a taper off rather than a huge drop which is another reason I rated its effectiveness higher at 7/10.


Value for Money 6/10

Prices vary based on supplier however on average based on the FireBallLabz website you will £30 for a 30 serving tub. This puts Jawbreaker in the average price bracket however I gave it 6/10 since this preworkout contains more cheaper ingredients and lower dosages of most ingredients which would have kept the price lower incomparison to others especially without the inclusion of patented ingredients (except Bioperine). Still, in line with the price of an energy drink yet containing more superior ingredients you can’t complain too much.

Taste & Mixability

Taste & Mixability 6/10

I tried 2 of the 3 available flavours (forbidden fruits, knockout & up in flames) in this preworkout both of which didn’t taste great but weren’t unbearable either. The mixability was fairly good although you did have some ingredients which did not mix great leaving some sediment in the bottom and floating around when drinking. Taste isn’t a big issue to me i’m more concerned with effectiveness however mixability is important but bioavailability and utilisation of the ingredients in the preworkout.




  • Great Energy & Focus – Nice blend of stim and cognitive ingredients.
  • Good formulation – Extensive ingredient list, although a number are underdosed when combined there is still a great benefit.
  • Proven Ingredients – A number of the ingredients are research backed.
  • Price – £30 for 30 servings in on part with most in the industry.
  • Excellent transparency  – You won’t find any label trickery with proprietary blends in this supplement.


  • Pump Ingredients – It would benefit from dosage more in line with research or inclusion of other pump ingredients.
  • Flavour & Mixability – 2 of the 3 flavours I tried did not taste or mix great and limited choice with just 3 flavours.
  • Dosing – It would benefit from less ingredients and using higher dosages of the more important ingredients.
  • Endurance & Strength – Lack of proven ingredients to aid endurance and strength such as beta alanine & creatine.
  • Citrulline – Would benefit from switching to Citrulline Malate in line with research
  • Sucralose – Artificial sweetener which many are against although personally I see no issue in them.
  • Fat Burners – There are a few ingredients in this preworkout which would be better suited in a fat burner and would not serve the greatest purpose in a preworkout formula.