Higher Nature Citricidal contains grapefruit seed extract concentrate, which is thought to have anti-bacterial, anti-microbial and anti-fungal properties. Grapefruits are naturally rich in antioxidants and essential oils. Ideal as part of a natural first aid kit, grapefruit seed extract is well known for its many uses. Always use diluted, mix a few drops in water or juice. This product can also be used for digestive support, and may be particularly beneficial when travelling.