Nitraflex Ultra by GAT Sport is a extreme-stim pre-workout. GAT's loaded Nitraflex. One scoop is 350mg of caffeine from green coffee, 5g of citrulline, 3.2g of beta-alanine, 2.5g of betaine, 1g of tyrosine, 150mg of theobromine, 100mg of theanine, and 50mg of Dynamine. The doses are written out. Stronger and clearer than Nitraflex Burn, and still an extreme stim.
5g of citrulline, 3.2g of beta-alanine, and 2.5g of betaine are written out. The tub is $39.99 for 30 servings, about $1.33 each. The limit is that 350mg of caffeine plus theobromine and Dynamine is not a beginner scoop.
Disclaimer: This is an independent editorial analysis. No brand paid for this score.
$1.33 / serving · 30 servings / container
Strawberry Watermelon, Blue Raspberry, Peach Pineapple
2 stores we checked on Oct 26, 2026, best price per serving first. Prices change often, so the price at checkout is the one that counts.
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Lowest price we have written down
The company behind Nitraflex Ultra
How its label, price and reviews stack up against the 158 pre-workout tubs we rank.
#4of 8
GAT Sport products6.0/10
Our Review Scan score. Amazon doesn't let other sites show its star ratings.
Next to other pre-workout tubs. This one is the bright bar.
Cheapest on the left. This one is the bright bar.
Each serving of GAT Sport Nitraflex Ultra has 350mg of caffeine, more than 73% of the 122 pre-workout tubs we rank that list an amount. That makes it an extreme-stim pre-workout (350mg or more), where it ranks #9 of 35.
The doses we track are 5g of citrulline (more than 40% of the 91 that list it), 3.2g of beta-alanine (more than 36% of the 107 that list it), and 2.5g of betaine (the same as most of the 25 that list it).
The lowest price we found is $39.99 for 30 servings, or $1.33 per serving. That's cheaper than 56% of the 158 pre-workout tubs we rank, where the typical one costs $1.50.
We checked 2 stores on Oct 26, 2026: Amazon and Walmart. It comes in 3 flavors.
GAT Sport makes Nitraflex Ultra. The brand was founded in 1998 and is based in Monroe, Connecticut. We rank 8 GAT Sport products, averaging 7.7 out of 10.
We score it 7.8 out of 10, #71 of 199 pre-workouts. Its strongest rating is Ingredients & Blend 9.0 and its weakest is Review Scan 6.0.
Other tubs close to this one on caffeine, stim level, and the main ingredients.
$3.00 / serving · 20 servings / container
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$1.25 / serving · 20 servings / container
$1.05 / serving · 25 servings / container
The rest of the lineup we have ranked from this brand.
$0.21 / serving · 100 servings / container
$1.87 / serving · 16 servings / bottle
$1.50 / serving · 30 servings / container
$1.00 / serving · 20 servings / container
$1.00 / serving · 30 servings / container
$1.17 / serving · 30 servings / container
$1.33 / serving · 30 servings / container
