I Tried Crazy Nutrition Intensive Pre-Train (My 2025 Review)

Many people are endorsing the Crazy Nutrition Intensive Pre-Train, including me. If you know me, you will know I only recommend products I use, enjoy and have solid scientific backing.

This Crazy Nutrition Pre-Workout is one of those. And I’m always amazed when a pre-workout is appropriately dosed. In the saturated market of pre-workout supplements, Crazy Nutrition produces one of the few well worth your money.

Pros

• Dosed effectively, you can receive the benefits of each element.
• With a 60-day money-back guarantee, you can effectively try it for free.
• Easy on the stomach.
• Not very sweet or sour.

Cons

• Not everyone will enjoy the taste.
• More expensive than similar pre-workouts if you’re not on a subscription.

Who Is Crazy Nutrition?

Crazy Nutrition is a supplement brand owned by Wolfson Brands. They are a relatively new company, debuting their first product in 2021 with a whey protein supplement. Since then, they’ve developed a mass gainer, creatine, and the pre-workout supplement we will review.

According to Crazy Nutrition’s personnel, they don’t just throw random substances into supplements. They have a team of dietitians on staff who create these supplements based on elite expertise.

While this does not imply that the supplements are good, Crazy Nutrition have done their homework and created a pre-workout that is appropriately dosed and really effective.

Crazy Nutrition Intensive Pre-Train Pre-Workout Review

Ingredients

This pre-workout supplement is distinguished from others because each ingredient is adequately dosed. Many pre-workout supplements underdose components only to say they’re in there or disguise doses under proprietary blends.

Let’s start the review by looking at the main efficacious ingredients individually. Here is the list of the most important ingredients:

Ingredient	Dose
Citrulline Malate 2:1	7 g
Beta-Alanine	2.5 g
Betaine Anhydrous	1.8 g
Taurine	1 g
Caffeine	200 mg
Ashwagandha	300 mg

Citrulline Malate 2:1 (7g)

For citrulline malate 2:1, the most effective dose is 6-8 g, with the upper end being better for acute performance enhancement and the lower end for chronic supplementation ^[1][2].

For example, taking 8 g of citrulline malate 60 minutes before exercise enhanced reps to failure, decreased muscle soreness for 24 to 48 hours, and improved maximal grip strength ^[1].

When 6 g is consumed over seven days, the time to exhaustion rises during moderate-intensity cycling ^[2]. Furthermore, muscle fatigue was reduced following exercise compared to placebo ^[3]. How does citrulline malate improve your endurance and possibly your pumps in the gym?

It is a vasodilator, also called a nitric oxide enhancer. You may recall the good old days of NO Explode pre-workout. They attempted to create a supplement that would produce the improvements in the abovementioned experiments.

However, they had one major weakness. Using L-arginine. L-arginine is converted to nitric oxide in the intestines. Unfortunately, nitric oxide is poorly absorbed in the gut, resulting in no dilatation of the blood arteries.

L-citrulline is converted to L-arginine in the kidneys, which bypasses the gut and increases nitric oxide. This leads to increased blood supply to the working muscles.

But why citrulline malate rather than L-citrulline? According to research, citrulline and malate may operate synergistically to increase ATP generation while decreasing lactic acid buildup, extending fatigue. As a result, Crazy Nutrition dosed it far higher than typical pre-workouts.

Beta-Alanine (2.5g)

Beta-alanine is another endurance supplement causing tingling and itching in the skin. This is a safe side effect when taking 800 mg or more, as it boosts the production of carnosine ^[4].

This enhanced carnosine concentration improves the muscle’s ability to eliminate acidic waste products produced as a byproduct of energy regeneration. This leads to an improvement in short-term high-intensity endurance.

For example, a meta-analysis found that 179 g of beta-alanine improved endurance performance by 2.85% ^[5]. Not all at once!

This takes three to ten weeks. Endurance gains are most successful in the 1-4-minute range, which can result in very high rep sets in the gym or long sprints on the track ^[6].

The suggested dose ranges from 2.4 to 6.4 g, with the 2.5 g dose in this pre-workout being at the lower end of the spectrum.

However, it is not about a single dose size. It’s the accumulation over time. So, if you train four times a week and take a pre-workout before each session, it’s a good idea to find a pure beta-alanine pill to use on off days to increase your chronic dose.

Betaine Anhydrous (1.8 g)

Betaine anhydrous is a more recent supplement ingredient included in pre-workout formulations showing promise. It may improve the anabolic environment after exercise by lowering the involvement of the AMPK pathway ^[7].

In layman’s terms, the AMPK molecular pathway activates endurance adaption processes and inhibits the muscle-building pathway known as mTOR.

Therefore, downregulating the AMPK pathway may increase the duration spent in an anabolic environment.

The suggested dose ranges from 1 to 6 g, with Crazy Nutrition Intensive Pre-Train being within this range at 1.8 g.

Taurine and Caffeine

Caffeine and taurine are common energy drink ingredients that function well in pre-workouts. The most interesting aspect is how they work together.

A taurine intake of 71-3105 mg decreases the need for large caffeine levels to get a performance-enhancing effect ^[8].

The higher the taurine intake, the better the performance, regardless of caffeine dosage. Typically, a dose of 3 – 6 mg of caffeine per kilogram of body weight effectively increases strength by 6.5% and increases the number of reps performed when lifting by 9.4% ^[9].

If you weigh over 65 kg, you may notice Crazy Nutrition is beneath the 3 mg barrier. However, with taurine added, only 40 – 325 mg of caffeine is required ^[8].

Ashwagandha (300 mg)

While Ashwagandha is commonly used to relieve stress and anxiety, two meta-analyses found that a 300 – 1250 mg dose may enhance strength, power, and VO2max ^[10][11].

If you are caffeine-sensitive or train in the evening, there is also a caffeine-free version of the Intensive Pre-Train.

Crazy Nutrition Intensive Features

Taste

Unexpectedly, the fruit punch flavor is delicious, and I’m enjoying it. I say unexpectedly because I despise the taste of cough medication in certain fruit punch flavors.

On the contrary, it has the flavor of a tropical punch. Energy drinks and overly sugary pre-workouts are also not my cup of tea, but this one tastes great.

There are also two other flavor options, Green Apple and Blue Raspberry, which I haven’t tried, but the very few negative reviews the product has are about the raspberry taste.

Mixability

Blenders and milk frothers make quick work of any substance. I figured I’d see how it would function as a pre-workout blend for those times when you’re on the run.

That is, shaken, rather than stirred, in your shaker bottle (i.e., without the blender ball).

About 250 milliliters of water and half a scoop of Intensive Pre-Train were the ingredients I used. Since I wasn’t planning on training after consuming this, I reduced the amount from the recommended 450–500 ml per scoop—no lumps or powdery aftertaste—just a smooth, precisely blended drink.

Price

The pricing is reasonable for a well-formulated pre-workout supplement. Especially if you subscribe, which is worthwhile if you train on a regular basis.

If you wish to test the waters before subscribing, a one-time order for 30 servings costs $64.99.

They provide a unique 60-day money-back guarantee, allowing you to buy with confidence. If you subscribe, you can save money on every order if you train up to 6 days per week, which will cost you only $45.49. You’re getting amazing value because many underdosed pre-workouts cost around $35.

User Reviews & Testimonials

The Crazy Nutrition Pre-Train supplement has outstanding reviews. Almost all customers are very happy with their purchase, and I will share a few reviews from their website:

“I love this pre workout mix. Others I have tried have left me a bit jittery. I have been using it for 30 days, and it is not only tasty, but really gives me the boost I need after work. Two thumbs up!”- John S.

“I like bitter taste so perfect to me, the result are definitely here and all of this without caffeine. I had to stop my subscription because of a heavy surgery and a long recovery but if I can go back to work I’ll definitely go back to this amazing product. Highly recommended!”

As I mentioned, aside from some logistic issues, the only complaints in the reviews are about taste, like this two-star review:

“Works well, tastes terrible…didn’t finish”– Jimmy I

Crazy Nutrition Pre-Workout Alternatives

Shifted Maximum Pre-Workout

Their pre-workout supplement is renowned for its substantial 30 g serving size, which allows the inclusion of various performance-enhancing substances in ideal proportions and additional speculative compounds with the potential to improve performance without any adverse side effects.

The Shifted Maximum Pre-Workout supplement provides a hefty 300 mg dose of caffeine meant to enhance mental and physical stimulation.

If you are sensitive to caffeine, this product is not for you. Many components are comparable to those found in the Crazy Nutrition Intensive Pre-Train.

Shifted Maximum Pre-Workout costs more than other pre-workouts, but its broad, high-quality component list justifies this.

Shifted Maximum Pre-Workout is a highly effective and scientifically validated product that distinguishes itself via its meticulous ingredient selection and dosage approach. It offers great benefits for enhancing workout performance.

You can read our full Shifted Pre-Workout review here.

Transparent Labs Bulk Pre-Workout

The pre-workout supplement contains a blend of performance-enhancing and nootropic ingredients that promote muscle endurance, fatigue resistance, and improved cognitive function. It also comes in a variety of flavors and has been tested for banned substances.

Transparent Labs Bulk Pre-Workout includes Citrulline Malate, Beta-Alanine, Betaine Anhydrous, Taurine, L-Tyrosine, Alpha-GPC, Organic Caffeine, L-Theanine, Theobromine, Panax Ginseng, Bioperine, and Boron.

These compounds were carefully picked for their proven impacts on workout performance, which range from enhancing nitric oxide production for better blood flow to boosting energy and cognitive abilities.

You can read our full Transparent Labs Bulk Pre-Workout review here.

Frequently Asked Questions About Crazy Nutrition Intensive Pre-Train

Is Crazy Nutrition Pre-Workout Safe?

Crazy Nutrition Intensive Pre-Train is safe to use in moderation. That is, use a single serving before working out rather than abusing the pre-workout by taking many portions throughout the day. If you get jitters or anxiety after taking a pre-workout supplement, L-theanine can help “take the edge off” the caffeine.

Another strategy to prevent jitters is consuming a high-carbohydrate meal before your pre-workout, which you should do anyway.

Is Crazy Nutrition Intensive Pre-Train Worth It?

Crazy Nutrition Intensive Pre-Train is worth purchasing if you want a pre-workout that will boost your strength, power, and endurance at the gym. It also works well as a cardio pre-workout because it contains substances that improve endurance.