GU Energy Gels are crafted to supply both energy and key nutrients like electrolytes and amino acids to keep you feeling strong and energized Provides quick, effective, and sustained energy to meet the demands of all types of activity All energy gels are Vegan, gluten free, and Kosher Available in caffeinated and non caffeinated flavors. Caffeinated flavors come with either 20mg or 40mg of caffeine Retailers are not permitted to sell on the Amazon.com marketplace unless authorized in writing by GU