What is Diatomaceous Earth? Diatomaceous Earth (DE) are the remains of microscopic one-celled Organisms called Diatoms.We constantly test our Diatomaceous Earth via batch testing and make sure it is sourced from the purest of these fresh water lakes Our Diatom ranges are packed in the UK in accordance with UK legislation and by our team who are trained in food safety awareness. What is DiatomPure Human Grade? DiatomPure Human Grade is made using the finest Diatomaceous Earth, well known for its high 'silicia' content. Silica plays a significant role in our bodily functions. DiatomPure Human Grade is Food Grade obtained from the purest fresh water it is organic and Eco-friendly All FOOD-GRADE DE MUST BE SOURCED FROM FRESHWATER