Clif Bloks Energy Chews Tropical Punch A tropical oasis packed into one-handed BLOKS bites easily fits in a bike jersey, running shorts or a backpack. Contains 25mg caffeine per serving. Not recommended for children or pregnant women. Supplementary sports food with carbohydrates, green tea extract (caffeine) and potassium Made with 95% organic ingredients Easy-to-chew Simple-to-handle When should I eat CLIF BLOKS Energy Chews? Half a packet of CLIF BLOKS can be eaten 15 minutes prior to activity to increase blood sugar levels, followed by 1-2 packets per hour during activity. Consumption of CLIF BLOKS should always be followed with a mouthful of water.