Higher nature citricidal 25ml use diluted grapefruit seed extract to gargle or consume a few drops in water or juice also use as a mouthwash facial and nail cleanser skin rinse and household cleanser ideal for travelling not for citrus allergy sufferers never use undiluted see suggested intake and usage information below also available as citricidal tm tablets all time best seller grapefruit seed extract is a natural cleanser wherever there is a need ideal for internal or external use