Jacked Factory is a supplement company that has gained a lot of admirers over the last few years. They have a reputation for well dosed supplements, with no fillers or proprietary blends (or mystery doses as they are known in the bodybuilding world).

They only use the ingredients that they think will work best, and as a result they usually have quite short ingredients list – which is a sign of a great product!

Nitrosurge is a nitric oxide booster and pre workout supplement, designed to give you improved focus, improved energy, and to help avoid fatigue for as long as possible during our workout.

The nitric oxide will also provide an excellent pump, filling your muscles with nutrient carrying blood and helping to increase muscle protein synthesis after your workout.

In this review we will take a look at the individual ingredients (including dosage and effectiveness) and then review the supplement as a whole.

Ingredients Review

There are six active ingredients contained in this pre workout, plus Bioperine (black pepper fruit extract) that is included so that it can enhance the absorption of the other ingredients. The ingredients are L-Citrulline, Beta Alanine, Betaine, Caffeine, L-Theanine, and Hordenine. In this section we will take a look at each one.

L-Citrulline (2g)

An amino acid that is designed to improve gym performance (or sports) and to improve heart health. It can reduce fatigue and muscle soreness, making it the perfect supplement to take the day after a hard workout, and it can increase nitric oxide – necessary for the pump. It may also have a minor effect on blood flow, and it can increase training volume. 3g per day is deemed to be the perfect amount, so two scoops would be required, though 2g should still be high enough to see the benefits.

Beta Alanine (1.6g)

“A modified version of the amino acid Alanine” according to Examine.com [1], Beta Alanine has been shown to increase muscular endurance, power output, and to lower fatigue. It may also have a small effect on reducing body fat, but this is probably due to the increased exercise you are able to perform [2]. For best results you want a dosage of around 2-5g so would need to scoops to hit the right amount.

Betaine (1.25g)

Betaine has many great benefits, it is found in beetroot and has rapidly risen in popularity over the last couple of years due to it working similarly to creatine.

It is also great for lowering Homocysteine levels which helps to reduce the risk of atherosclerosis and blood clots [3]. Doses are usually effective at around 2.5g so you might need to take two scoops of this pre workout rather than one to see the full effects.

Caffeine (180mg)

Excellent at improving performance in the gym, improving concentration and cognitive ability. Caffeine, along with other perks can also lead to fat loss as it increases metabolism temporarily. The dosage is great, with one scoop being right for people who have a low tolerance to caffeine (also for people with low body weight) and two scoops being perfect for bigger people, or people with a higher tolerance.

L-Theanine (90mg)

L-Theanine is added to caffeine-based supplements as it works synergistically. This means that the two combined create an even better result than the sum of their parts. While caffeine can improve your performance and cognitive ability, L-Theanine can keep you relaxed and focused – reducing your blood pressure and calming you [4]. This may affect the ability of caffeine to work as a fat-loss supplement, but is perfect for pre-workouts. Particularly if you get caffeine jitters.

Hordenine (25mg)

Hordenine is a relatively unstudied supplement, as such it is hard to review. There does seem to be some evidence that it can increase fat burning though. Out of all the ingredients listed, these seems like a bit of a gamble. But if it does help burn fat then it is well worth including.

Conclusion

The combination of ingredients is very good, and Nitrosurge definitely delivers on its promises. It seems that to get the correct doses you should be taking two scoops pre-workout rather than just one.

But remember that two scoops would contain 360mg of caffeine which is quite a high dose, particularly if you don’t habitually take much caffeine in your diet. You should take this around 20-30 minutes before your workout (including warm up time).

 

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Related: View our Top 10 Best Pre-Workouts without creatine list here

References

[1] https://examine.com/supplements/beta-alanine/

[2] Kern, B., Robinson, T. 2011. Effects of β-alanine supplementation on performance and body composition in collegiate wrestlers and football players. The Journal of Strength & Conditioning Research 25(7): 1804-15

[3] http://www.emedicinehealth.com/homocysteine/article_em.htm [4] https://www.nootropedia.com/a-beginners-nootropic-l-theanine-and-caffeine/

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