To use the GU Energy Gel, simply tear open the packet and squeeze the gel into your mouth. It's best to consume it during your training or competition when you start feeling low on energy. You can have it with water to aid in digestion. As for storage, keep it in a cool, dry place away from direct sunlight. There's no need for any special maintenance. Just make sure to check the expiration date before use. If you have any known allergies to the ingredients like maltodextrin, fructose, or amino acids, consult your doctor before using this product.