Cellucor C4 Ultimate Performance 380g
Cellucor C4 Ultimate Performance 380g
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Description
Cellucor C4 Ultimate Performance 380g is C4's most advanced pre-workout powder. Cellucor UK quotes up to 300 mg of caffeine and 4,800 mg of CarnoSyn® beta-alanine per full serving, with L-citrulline, L-tyrosine, choline, AstraGin®, electrolytes and vitamins B6 and B12, and no sugar.
Caffeine helps increase alertness and concentration, magnesium contributes to normal muscle function and to electrolyte balance, and vitamins B6 and B12 contribute to the reduction of tiredness and fatigue. Available here in Cosmic Rainbow, Lemon Twist, Bubblegum, Tutti Frutti.
Key benefits
- 150 mg caffeine per 9.5 g scoop (300 mg per 2-scoop serving)
- 3 g L-citrulline and 2.4 g beta-alanine per scoop
- Magnesium and sodium
- Choline and AstraGin®
- Sugar-free
How to use
Start with 1 scoop (9.5 g) in 250 ml of water 20–30 minutes before training to assess tolerance. Experienced users can take 2 scoops (19 g, 300 mg caffeine) in 400–500 ml of water. Never take more than 2 scoops a day. Beta-alanine can cause a harmless tingling sensation.
Who it's for
Experienced gym-goers who are used to higher-caffeine pre-workouts.
Flavours
Cosmic Rainbow, Lemon Twist, Bubblegum, Tutti Frutti. Choose your flavour from the options above.
Allergens
May contain traces of milk and gluten. Recipes can vary by flavour and may change, so always check the label on your pack.
Good to know
High caffeine content (150 mg per scoop; 300 mg per 2-scoop serving). Not recommended for children or pregnant or breastfeeding women. Do not combine with other caffeine sources. Colours vary by flavour: if the pack lists E102, E104, E110, E122, E124 or E129, that colour may have an adverse effect on activity and attention in children. Not for under-18s or pregnant or breastfeeding women. Speak to your doctor before use if you have a medical condition or take any medication. Do not exceed the recommended daily dose. Keep out of reach of children. Food supplements should not be used as a substitute for a varied, balanced diet and a healthy lifestyle.
Product information based on the Cellucor UK website (cellucor.uk, checked 4 Oct 2026).
More information
Nutrition
Typical values — flavours may vary. Always check the product label.
Values from the Cellucor UK website (cellucor.uk, checked 4 Oct 2026). Cellucor UK lists these values per 9.5 g scoop but sells the 380 g tub as 20 servings, so a full serving is 2 scoops (19 g); the brand's headline figures (300 mg caffeine, 4,800 mg beta-alanine) match 2 scoops, although its 7,000 mg citrulline claim does not (2 scoops = 6,000 mg).
Serving size: 1 scoop (9.5 g) · Servings per pack: 40 scoops (20 servings of 2 scoops)
Typical values
Per serving
% NRV
Magnesium
60 mg
16%
Vitamin B6
0.21 mg
15%
Vitamin B12
1.3 µg
52%
Sodium
120 mg
—
L-citrulline
3000 mg
—
CarnoSyn® beta-alanine
2400 mg
—
L-tyrosine
250 mg
—
Caffeine
150 mg
—
Choline
100 mg
—
AstraGin®
17.5 mg
—
%NRV calculated against EU/UK nutrient reference values; — = no NRV established.
Panel shared by all flavours.
Ingredients: L-citrulline, beta-alanine, bulking agent (polydextrose), anti-caking agents (silicon dioxide, calcium silicate), acidity regulators (citric acid, malic acid), magnesium citrate, flavourings, sodium chloride, choline bitartrate, L-tyrosine, caffeine anhydrous, sweeteners (sucralose, acesulfame K), colour (varies by flavour; beetroot red shown for the brand's reference flavour), AstraGin® (Panax notoginseng and Astragalus membranaceus extracts), cyanocobalamin (vitamin B12), pyridoxine hydrochloride (vitamin B6).
Allergens: May contain traces of milk and gluten.
Directions: Take 1–2 scoops 20–30 minutes before training.
Shipping
Need help choosing?
Check the product description above for available ingredients, nutrition and flavour information. If a detail you need is missing, ask us before ordering.
Always read the label for ingredients, allergens, directions and suitability. Information can vary by flavour and pack size. Food supplements should not replace a varied, balanced diet and a healthy lifestyle. If you need help checking a product, contact us before ordering.