The simplest way to enjoy Backed By Green Organic Plant Based Vitamin C is to mix it with 300ml cold or room temperature water. Adding ice cubes during the summer will make it even more enjoyable to drink. However It's generally not recommended to mix with hot water as high temperatures can degrade the Vitamin C content in the drink. Vitamin C is a water-soluble vitamin that is sensitive to heat and can be destroyed or degraded by high temperatures.