{"product_id":"cellucor-c4-ultimate-performance-380g","title":"Cellucor C4 Ultimate Performance 380g","description":"\u003cp\u003e\u003cstrong\u003eCellucor C4 Ultimate Performance 380g\u003c\/strong\u003e 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.\u003c\/p\u003e\u003cp\u003eCaffeine 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.\u003c\/p\u003e\u003ch3\u003eKey benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e150 mg caffeine per 9.5 g scoop (300 mg per 2-scoop serving)\u003c\/li\u003e\n\u003cli\u003e3 g L-citrulline and 2.4 g beta-alanine per scoop\u003c\/li\u003e\n\u003cli\u003eMagnesium and sodium\u003c\/li\u003e\n\u003cli\u003eCholine and AstraGin®\u003c\/li\u003e\n\u003cli\u003eSugar-free\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eHow to use\u003c\/h3\u003e\u003cp\u003eStart 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.\u003c\/p\u003e\u003ch3\u003eWho it's for\u003c\/h3\u003e\u003cp\u003eExperienced gym-goers who are used to higher-caffeine pre-workouts.\u003c\/p\u003e\u003ch3\u003eFlavours\u003c\/h3\u003e\u003cp\u003eCosmic Rainbow, Lemon Twist, Bubblegum, Tutti Frutti. Choose your flavour from the options above.\u003c\/p\u003e\u003ch3\u003eAllergens\u003c\/h3\u003e\u003cp\u003eMay contain traces of milk and gluten. Recipes can vary by flavour and may change, so always check the label on your pack.\u003c\/p\u003e\u003ch3\u003eGood to know\u003c\/h3\u003e\u003cp\u003eHigh 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.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eProduct information based on the Cellucor UK website (cellucor.uk, checked 4 Oct 2026).\u003c\/em\u003e\u003c\/p\u003e","brand":"Cellucor","offers":[{"title":"Cosmic Rainbow","offer_id":58879348801910,"sku":"CEL102","price":26.99,"currency_code":"GBP","in_stock":true},{"title":"Lemon Twist","offer_id":58881859027318,"sku":"CEL104","price":26.99,"currency_code":"GBP","in_stock":true},{"title":"Bubblegum","offer_id":58881859060086,"sku":"CEL103","price":26.99,"currency_code":"GBP","in_stock":true},{"title":"Tutti Frutti","offer_id":58881859092854,"sku":"CEL101","price":26.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1017\/8278\/2326\/files\/cellucor-c4-ultimate--cosmic-rainbow---380g-10948106813777.jpg?v=1791696557","url":"https:\/\/valkyrie-strength.com\/products\/cellucor-c4-ultimate-performance-380g","provider":"Valkyrie Strength","version":"1.0","type":"link"}