Name: MRI Performance NO2 Black
Brand: MRI Performance
SKU: mri-no2-black

30-Second Review

NO2 Black by MRI Performance is a caffeine-free pre-workout. MRI's stimulant-free pump formula. One scoop is 4g of L-citrulline, 1.5g of HydroMax glycerol at 65%, 1g of Nitrosigine, 750mg of L-ornithine, 500mg of agmatine, and 100mg of S7, with 125mg of vitamin C. MRI says one scoop up to 200 pounds and two above that. The powder is black from 100mg of activated charcoal. No caffeine and no beta-alanine.

One scoop gives you 4g of L-citrulline, 1g of Nitrosigine, 1.5g of HydroMax, 750mg of L-ornithine, and 500mg of agmatine, with every amount on the label. It is stimulant-free, so it stacks under a stim pre or works for a late session. The tub is $37.99 for 30 servings, about $1.27 each. The limit is that 4g of citrulline per scoop is below the 6g or more the loaded pump formulas use, and two scoops cut the bag to 15 servings.

Disclaimer: This is an independent editorial analysis. No brand paid for this score.

NO2 Black

MRI Performance7.2

Caffeine-Free0mg caffeine

7.6

Rating Breakdown

Price & Value7.6

Ingredients & Blend7.6

Brand Reputation7.2

Review Scan8.0

Final Overall Score7.6

$1.27 / serving · 30 servings / container

NO2 Black

MRI Performance7.2

Caffeine-Free0mg caffeine

Price & Value7.6

Ingredients & Blend7.6

Brand Reputation7.2

Review Scan8.0

7.6

$1.27 / serving · 30 servings / container

Pros

One scoop gives you 4g of L-citrulline, 1g of Nitrosigine, 1.5g of HydroMax, 750mg of L-ornithine, and 500mg of agmatine, with every amount on the label
It is stimulant-free, so it stacks under a stim pre or works for a late session

Cons

4g of citrulline per scoop is below the 6g or more the loaded pump formulas use, and two scoops cut the bag to 15 servings
There is no beta-alanine, so it is a pump add-on rather than a full pre-workout

Label Snapshot

Caffeine0mg

Beta-AlanineNone

L-Citrulline4g

L-TheanineNone

CreatineNone

Flavors

Jacked Juice, Black Razzy Ripped, Swoleberry

Where to buy

3 stores we checked on Oct 27, 2026, best price per serving first. Prices change often, so the price at checkout is the one that counts.

Best price per serving

Amazon

Available flavors

Jacked Juice, Black Razzy Ripped, Swoleberry

amazon.com

Buy for $37.99$1.27 / serving

MRI Performance61 reviews at MRI Performance

Available flavors

Jacked Juice, Black Razzy Ripped, Swoleberry

On sale from $59.99

mri-performance.comOfficial Brand Store

Buy for $39.99$1.33 / serving

GNC10 reviews at GNC

Available flavors

Jacked Juice, Swoleberry, Black Razzy Ripped

gnc.com

Buy for $39.99$1.33 / serving

We may earn a commission when you buy through these links, at no extra cost to you. It never changes a score. How we make money

Tub price history

Lowest price we have written down

About the brand

The company behind NO2 Black

Brand name: MRI Performance
Parent company: Medical Research Institute
Headquarters: Harrison, Ohio

MRI Performance NO2 Black Stats

How its label, price and reviews stack up against the 158 pre-workout tubs we rank.

Rankings

#111of 199

All pre-workouts

#18of 32

Caffeine-Free Pre-Workouts

#2of 2

MRI Performance products

Caffeine-Free Pre-Workouts

All 32 Products

Supplekings Score

Solid7.6

Higher than 45% of tubsAverage 7.6

Price & Value0.77.6
Ingredients & Blend0.17.6
Brand Reputation0.87.2
Review Scan0.28.0

Shopper Rating

4.8/5

71 reviews at MRI Performance, GNC

Sold At

At a Glance

Type: Caffeine-free pre-workout
Caffeine: None
Stim level: Caffeine-free
Servings per tub: 30
Flavors: 3
Prices checked: Oct 27, 2026

Label Doses

Next to other pre-workout tubs. This one is the bright bar.

Caffeine

None

CitrullineMore than 17% of tubs

2gTypical 6g10g

NitrosigineMore than 33% of tubs

750mgTypical 1.25g1.5g

Glycerol

1.5g

Price Stats

Cheapest on the left. This one is the bright bar.

Per servingCheaper than 62% of tubs

$1.27

$0.67Typical $1.50$3.00+

Lowest price for 30 servings: $37.99 at Amazon
Change since Oct 27, 2026: No change

MRI Performance NO2 Black FAQ

How much caffeine is in MRI Performance NO2 Black?

There's no caffeine in MRI Performance NO2 Black. It ranks #18 of 32 caffeine-free pre-workouts.

What's on the MRI Performance NO2 Black label?

The doses we track are 4g of citrulline (more than 17% of the 91 that list it) and 1g of Nitrosigine (more than 33% of the 10 that list it).

How much does MRI Performance NO2 Black cost per serving?

The lowest price we found is $37.99 for 30 servings at Amazon, or $1.27 per serving. That's cheaper than 62% of the 158 pre-workout tubs we rank, where the typical one costs $1.50.

Where can you buy MRI Performance NO2 Black?

We checked 3 stores on Oct 27, 2026: MRI Performance, Amazon, and GNC. It comes in 3 flavors.

How do shoppers rate MRI Performance NO2 Black?

Shoppers give MRI Performance NO2 Black an average of 4.8 out of 5 across 71 reviews at MRI Performance and GNC. Our Review Scan score for it is 8.0 out of 10.

Who makes MRI Performance NO2 Black?

MRI Performance makes NO2 Black. Its parent company is Medical Research Institute. The brand is based in Harrison, Ohio. We rank 2 MRI Performance products, averaging 7.7 out of 10.