Jacked Factory Nitrosurge pre-workout powder provides many of the ingredients you'd expect in a pre-workout formula. However, the dosing of some active ingredients may not meet the recommended level to be effective.
Nitrosurge has many of the key ingredients found in a pre-workout supplement, including:
L-citrulline is a nonessential amino acid and nitric oxide enhancer that increases blood flow and the delivery of oxygen and nutrients to the muscles during a workout. ( 3 ) Sports nutrition experts recommend 6 to 8 grams of L-citrulline daily for energy-boosting benefits. ( 1 )
Beta-alanine is an amino acid needed to create carnosine, a dipeptide composed of the two amino acids beta-alanine and L-histidine. ( 4 ) Carnosine is found primarily in the muscle and works to reduce muscle fatigue to benefit performance. Larger concentrations of carnosine in the muscle may alleviate exercise-induced fatigue, allowing you to work out longer. ( 1 , 4 )
Supplementing with 4 to 6 grams of beta-alanine increases muscle carnosine concentration, benefiting HIIT workouts and exercise endurance. ( 1 , 4 )
Betaine anhydrous is a compound naturally produced in the body and obtained from food that supports cell hydration, protects cells, and aids in creatine production. ( 5 ) Similar to creatine, which assists in cellular energy production, having a higher concentration of both in muscle enhances exercise endurance and muscle-pumping power and recovery. ( 1 )
Though less is known about the ergogenic benefits of betaine anhydrous, early research suggests it allows you to lift heavier for longer periods, delaying fatigue, and may support muscle growth. ( 1 , 5 ) Sports nutrition experts suggest 1.25 to 2.5 grams of betaine per-day as a pre- or post-workout supplement. ( 1 )
Caffeine anhydrous is a highly studied athletic stimulant and a key ingredient in many pre-workout formulas. Low-to-moderate doses of caffeine enhance exercise performance by supporting energy, endurance, and focus. ( 1 , 6 )
Pre-workout supplements generally contain about 200-300 milligrams of caffeine per serving. ( 1 ) Because of caffeine's positive effects on exercise, we give high ratings to pre-workout supplements with caffeine anhydrous. ( 1 )
Nootropics are compounds that help you focus. ( 7 ) L-theanine and theobromine are two key nootropics in Jacked Factory Nitrosurge. The focus-enhancing ingredients may boost mood, reduce stress, and help you sleep better. ( 2 , 8 )
Research investigating the potential benefits of including nootropics in a pre-workout is limited. Still, improved focus during a workout may make you more present and engaged, improving performance and results. ( 1 )
Jacked Factory Nitrosurge also contains AstraGin, a proprietary compound consisting of astragalus and ginseng, botanicals that may improve nutrient absorption. However, research is limited, with one study showing improvements in the absorption of arginine, an amino acid used in some pre-workout formulas that the body converts to citrulline, and an increase in nitric oxide production. ( 1 , 9 , 10 ) How it benefits the Jacked Factory formula is unclear.
The pre-workout supplement from Jacked Factory has no sugar or calories, but it's sweetened with the artificial sweeteners sucralose and acesulfame potassium (Ace-K). Sweeteners aren't a key pre-workout ingredient for enhancing performance, but they are one we want to point out for those avoiding or limiting artificial ingredients.
Recent reports express some concern over the use of artificial sweeteners, noting that they may cause stomach upset or headaches, but they're generally recognized as safe. ( 11 ) It's okay to consume foods made with artificial sweeteners, but limiting your intake is better for overall health.
One of the major drawbacks of Nutrosurge is dosing. One scoop provides:
Key ingredient dosing for the pre-workout may be lower than the clinically effective dose. Still, Nitrosurge is a good choice for gym-goers looking for a less stimulating pre-workout supplement that may cause fewer side effects.
At $0.93 per scoop, Nitrosurge is priced below the average market for pre-workout supplements. The lower price makes it a good value for those who want to try pre-workout supplements without making a huge investment.
However, Jacked Factory may be able to keep the price point lower by opting out of third-party testing. The FDA oversees dietary supplements but doesn't test products for safety or effectiveness. The FDA only requires supplement makers to manufacture their products in facilities that follow Good Manufacturing Practices (GMP). ( 12 )
It's up to the manufacturer to ensure supplement safety and effectiveness. Third-party testing is an independent evaluation of a supplement that checks ingredients and potency for an added layer of protection.
Nitrosurge is made in a GMP facility but not independently lab- or third-party tested.
Because of the lower dosing of key ingredients, Nitrosurge may cause fewer pre-workout side effects. Nitric oxide enhancers like L-citrulline may cause flushing or skin irritation, while high intakes of caffeine may cause anxiety, heart palpitations, or difficulty sleeping. ( 13 )
Pre-workouts are safe for most healthy people as long as they take the supplement as directed on the label. ( 1 , 13 ) Unfortunately, some people may take multiple doses of pre-workout powder a day, consuming more than the 400-milligram daily limit for caffeine, leading to unwanted side effects. ( 13 , 14 ) A double dose of Nitrosurge provides 360 milligrams of caffeine, nearly meeting your daily caffeine limit.
Caffeine may also come from other food items, like coffee, energy drinks, or tea. ( 14 ) Cutting back on other sources of caffeine when using a pre-workout can reduce the risk of side effects. It's important to work your way up in caffeine dose when learning your personal tolerance.
Before starting the use of any pre-workout supplement, consult your doctor or a registered dietitian for individualized guidance on ingredients and doses for your needs.
More than 22,000 Amazon Customers have reviewed Jacked Factory Nitrosurge, giving the pre-workout an overall rating of 4.3 out of 5. Customer reviews give high marks for taste, effectiveness, and price. However, some consumers report that the supplement makes them feel jittery and tingly.
"I've been using the NITROSURGE Pre-Workout Supplement for 2 weeks now, and it has undoubtedly made a noticeable difference in my workout routine...However, the high stimulant content and the tingling sensation may not suit everyone," says Mister July, a verified Amazon customer.
Mike J. is an Amazon customer who didn't like the taste or the high caffeine content in the double scoop serving of Nitrosurge. "If taste is low on your list, feel free to entertain this option. It gives a smooth bump in energy and is formulated well for that. I do believe the max scoop is too great in caffeine content, so I'd stay away from double scooping, 360mg, but that's your decision."