CLIF Bloks Sours Energy Chews - Box of 18

Specs

Format: Box of 18 packets, each containing 6 cubes

Calories per serving (3 cubes): Approximately 80 kcal (Green Apple), approximately 90 kcal (Strawberry Lemonade)

Carbohydrates per serving: 21g

Sodium per serving: 107mg

Potassium per serving: 20mg

Caffeine per serving: Sour Green Apple: 0mg | Sour Strawberry Lemonade: 25mg

Flavors carried by DCL: Sour Green Apple, Sour Strawberry Lemonade with Caffeine

Carbohydrate sources: Tapioca Syrup, Cane Sugar, Maltodextrin

Certifications: Non-GMO, Plant-based

Gluten-free: Yes

Introduced: 2024: designed specifically to combat flavor fatigue on long efforts

Usage: Half packet 15-30 min before activity. 3-6 cubes every 20-30 min during activity. Always consume with water.

FAQ

Which Sours flavor contains caffeine?: Sour Green Apple is caffeine-free. Sour Strawberry Lemonade contains 25mg of caffeine per serving (3 cubes) via green tea extract.

How do the Sours compare nutritionally to regular Bloks?: Sours deliver approximately 21g of carbohydrates and 107mg of sodium per serving (3 cubes), at approximately 80 to 90 calories per serving. Standard Bloks deliver approximately 24g of carbohydrates and 50mg of sodium per serving at approximately 100 calories. Sours are slightly lower in calories and carbs with higher sodium per serving.

Why would I use Sours instead of standard Bloks?: Sour flavors are designed for athletes who experience sweet overload during long efforts, making it difficult to keep fueling consistently. The sour profile is palate-resetting and encourages drinking more water, which supports better hydration and absorption during extended rides.

How do I use CLIF Bloks Sours?: Half a packet (3 cubes) 15 to 30 minutes before activity. Then 3 to 6 cubes every 20 to 30 minutes during activity. Always consume with water.

Should I try individual packets before buying the box?: Try the individual packet first to confirm you like the sour profile and specific flavors before committing to a box of 18.

Best For

Cyclists and endurance athletes doing regular long efforts who have tried the Sours and want to keep them stocked. The box of 18 is the right buy for athletes who use Sours as a strategic rotation alongside standard Bloks or gels to combat flavor fatigue on rides over 3 hours.