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C4 Ultimate Icy Blue Razz

Nutrabolt
4.4
★ ★ ★ ★ ★
(3162 ratings)
Huperzine 50 mcg
Caffeine 300 mg
Alpha-GPC 200 mg
Product Image
Score91

A heavy-hitting pre-workout that combines intense stimulants with brain-supporting nootropics.

How scoring works
Quantity:320 Gram(s) • (20 servings)
Goals:
Fitness
Productivity Boost
Energy
Mental Focus
Cognitive Support
Brain Health
Weight Loss
Metabolism Boost

Score 91

A heavy-hitting pre-workout that combines intense stimulants with brain-supporting nootropics.

How scoring works

Also available as

1 option
326 servings • Orange Mango Caffeine 300 mg, Alpha-GPC 200 mg +1 more • 326 Gram(s) • 20 servings $39.99 ($1.99 per serving)
$38.82($1.94 per serving)
iHerb
$ 39.99
Amazon
$ 37.79
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Analysis

This supplement targets several pathways at once: energy, focus, pump, and endurance. It uses a mix of caffeine and theacrine to provide a long-lasting energy boost without a sharp crash. The inclusion of Huperzine A helps maintain cognitive alertness during long, hard gym sessions.

It is a smart choice for those who want to simplify their supplement stack by having everything in one tub. It fits athletes who require a high level of mental drive to push through their training. The 20-serving size is standard for a premium high-dose formula.

Pros

  • Strong focus-enhancing blend
  • Supports muscle power and pump
  • Includes BioPerine for better absorption
  • Trusted brand name

Cons

  • High caffeine content can cause jitters
  • Pricey compared to basic pre-workouts

Warnings

  • Start with a half scoop to test your tolerance
  • Stay hydrated as caffeine can be dehydrating

Nutrient quality

92 Highest impact

Inclusion of high-purity performance agents like CarnoSyn and AlphaSize ensures excellent nutrient quality. Meaningful dosages across the stimulant and pump matrices provide robust support for intensive training.

Ingredient transparency

91 Highest impact

Active ingredients are listed with precise dosages to allow for informed supplementation. Clear labeling and specific naming conventions reflect a high standard of transparency.

Customer satisfaction

94 Highest impact

Extremely high review volume and a strong average rating demonstrate broad and consistent consumer approval. Feedback indicates reliable delivery of intended focus and energy outcomes.

Value for money

86 Highest impact

Asking price reflects the quality and clinical-grade dosages provided in each serving. The product maintains a competitive value position within the premium pre-workout market.

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Goals

Fitness
Impact
Highest effect
A+ Goal FitA+ Strength of SupportA+ CoverageA+ Formula Quality

Citrulline, beta-alanine, and caffeine anhydrous are included to support muscular endurance and acute energy during physical activity. These ingredients may contribute to improved blood flow and reduced perception of fatigue during training.

Creatine and mental focus agents like Alpha-GPC support mechanisms of energy and focus required for high-intensity workouts. The multi-functional profile appears well aligned with fitness goals of enhancing power and sustained endurance.

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Productivity Boost
Impact
Highest effect
A+ Goal FitA Strength of SupportA+ CoverageA Formula Quality

Caffeine, Alpha-GPC, and Huperzine A are included in this high-potency formula to support sharp focus and sustained cognitive arousal. These ingredients provide a specialized strategy for enhancing mental speed and attention during high-demand tasks.

The combination of these nootropic and stimulatory compounds appears well aligned with the needs of both athletes and cognitive workers. This stack focuses on several critical neurological pathways to ensure peak productivity and performance.

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Energy
Impact
Highest effect
A+ Goal FitA Strength of SupportA CoverageA Formula Quality

The formula contains Caffeine Anhydrous, Theacrine, Beta-Alanine, Creatine, Alpha-GPC, and Huperzine A. These actives provide a dual-pronged approach to energy by targeting both the brain and the muscles.

Caffeine and theacrine extend the duration of alertness while minimizing the potential for a subsequent crash. Alpha-GPC and Huperzine A support the cholinergic system, which appears well aligned with cognitive focus during fatigue.

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Mental Focus
Impact
Highest effect
A Goal FitA- Strength of SupportA CoverageA Formula Quality

Caffeine anhydrous and cholinergic nootropics provide a robust approach to acute alertness and improved processing speed. The 300mg caffeine dose is highly effective for inducing immediate focus during mentally demanding periods.

Sustained concentration appears well aligned with the inclusion of AlphaSize Alpha-GPC and Huperzine A. The formula is logically constructed to target several brain pathways involved in vigilance and memory longevity.

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Cognitive Support
Impact
Highest effect
A+ Goal FitA- Strength of SupportA- CoverageA Formula Quality

Acute alertness and cognitive focus are supported through a potent multi-active matrix.

Alpha-GPC and Huperzine A are combined with Caffeine and Tyrosine to aid mental clarity during performance tasks.

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Brain Health
Impact
Highest effect
A Goal FitB+ Strength of SupportA- CoverageA- Formula Quality

Caffeine anhydrous and Alpha-GPC are combined with Huperzine A to support acute cognitive focus and mental energy. These ingredients may contribute to enhanced alertness and neurotransmitter balance during demanding tasks.

A 300mg dose of caffeine provides significant mental stimulation, while Alpha-GPC supports the synthesis of acetylcholine. The addition of Huperzine A addresses the prevention of acetylcholine breakdown for prolonged cognitive benefit.

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Ingredients

IngredientAmount per serving
Calories
5 Calorie(s)
Total Carbohydrates
1 Gram(s)
C4 Super Citrulline Pump Matrix
6 Gram(s)
CarnoSyn (Beta-Alanine)
 3.2 Gram(s)
Creatine Hydrochloride
1 Gram(s)
Creatine Nitrate (NO3-T)
 1 Gram(s)
Taurine
1 Gram(s)
N-Acetyl-L-Tyrosine
400 mg
Caffeine Anhydrous
300 mg
AlphaSize 50% A-GPC
200 mg
Theacrine
62.5 mg
Rauwolfia vomitoria root extract
1 mg
Huperzine A (Toothed Clubmoss extract)
 50 mcg
Adults 18–50 Women
Report overview
Huperzine (Toothed Clubmoss extract) · 50 mcg OverallScore80
B Active Ingredient Quality & BioavailabilityA- Dose, Safety & Label TransparencyB Value
C4 Ultimate in Icy Blue Razz delivers a reliable 50 mcg dose of Huperzine A alongside a heavy hitting pre-workout matrix. It is an excellent choice for athletes prioritizing focus, provided they are aware of the limitations of powder-based dosing.
View ingredientView products
Caffeine · 300 mg OverallScore69
B Active Ingredient Quality & BioavailabilityA Dose, Safety & Label TransparencyF Value
This advanced pre-workout delivers a strong 300mg dose of caffeine anhydrous for maximum intensity. Although highly transparent and effective, its premium cost and standard immediate-release delivery are notable considerations.
View ingredientView products
Alpha-GPC · 200 mg OverallScore52
C+ Active Ingredient Quality & BioavailabilityC- Dose, Safety & Label TransparencyF Value
Featuring high transparency and the branded AlphaSize form, this pre-workout ensures users know exactly how much choline they are consuming. While its focus benefits are supported by quality ingredients, the dose and value are less optimal for cognitive support.
View ingredientView products
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