5% Nutrition 5150 High Stim Pre-Workout - Mega Energy & Pumps

In this review of the 5% Nutrition 5150 High Stim Pre-Workout Powder, the bottom line is simple: it is for experienced lifters and athletes who want an aggressive, reliable stimulant kick and massive pumps. The reviewer found the product delivers concentrated, lasting energy and improved vascularity that fuels long sessions, thanks to a hefty 400 mg caffeine complex and 4 g of pure L-Citrulline. While not suitable for stimulant-sensitive users, the formula's combination of time-released caffeine sources, beta alanine and citrulline gives a clear edge for intense training days.

Key Features

• 400 mg Caffeine Complex: A blend of seven caffeine sources including time-released dicaffeine malate provides rapid and sustained energy to push through long or heavy workouts.
• 4 g Pure L-Citrulline: A high dose of pure citrulline supports nitric oxide production for enlarged pumps and improved blood flow during training.
• 2.5 g Beta Alanine: Beta alanine helps buffer lactic acid buildup to extend endurance during high-rep sets and longer conditioning work.
• Stim-Crazy Delivery: Multiple natural extracts such as coffee, green tea, yerba mate and guarana combine for layered stimulation and focus without an immediate crash.
• Flavor Variety: Available in six flavors including Rocket Pop, offering a pleasant taste profile noted by many customers as smooth and non-face-tingling.

Who It's For

This pre-workout is best suited for experienced gym-goers, competitive athletes, or anyone who regularly trains with high intensity and wants a strong stimulant-driven product that also prioritizes pumps via citrulline. The formula's stimulant load and beta alanine make it effective for hard lifting sessions, sprint intervals, and days when mental drive is needed.

Users who are sensitive to caffeine, or those looking for a mild daily energizer, should look elsewhere; the 400 mg stimulant total is substantial and can cause upset stomach or overstimulation for some. Also, those seeking stimulant-free pump products will not find a match here.

Pros & Cons

Pros

• Powerful, sustained energy and focus from a seven-source caffeine complex that keeps intensity high.
• Serious pumps and vascularity thanks to 4 g of 100% L-Citrulline rather than a malate blend.
• Improved endurance and reduced fatigue with 2.5 g of beta alanine supporting longer sets.
• Positive feedback on taste and overall product quality from multiple users.

Cons

• High stimulant level may be too intense for caffeine-sensitive users and can cause stomach upset for a minority.
• Not ideal for those seeking stimulant-free or low-stim formulas.

Specifications

Brand	5% Nutrition
Servings	30 servings
Caffeine	400 mg from 7 sources (including dicaffeine malate)
L-Citrulline	4 g of 100% pure L-Citrulline per serving
Beta Alanine	2.5 g per serving
Flavor	Rocket Pop (one of six available flavors)

Our Verdict

The 5150 High Stim Pre-Workout is a strong choice for seasoned athletes who demand intense energy, extended endurance and massive pumps in a single scoop. Its combination of time-released and natural caffeine sources plus a large citrulline dose offers clear training benefits and good value for lifters who tolerate stimulants well.

Frequently Asked Questions

How strong is the stimulant effect?
The product contains 400 mg of caffeine from multiple sources, producing a pronounced and long-lasting stimulant effect best suited to experienced users.

Will it cause tingling from beta alanine?
Beta alanine at 2.5 g can cause a mild tingling sensation for some users, but many reviewers report manageable or minimal paresthesia.

What kind of pump can I expect?
With 4 g of pure L-Citrulline, users generally report noticeably enhanced blood flow and vascularity compared with lower citrulline products.