Thank you for contacting NuNaturals.
NuNaturals has searched the globe and uses only the best tasting and highest purity extracts available. The process starts with stevia leaves, which are initially extracted using water. The liquid is then separated from the fibrous plant matter using food grade alcohol and/or natural enzymes (depending on the extract). It is then filtered with natural resins to remove the bitter parts of the extract. Finally, it is spray dried.
All of our stevia extracts are Non-GMO Project Verified and in some products USDA Certified Organic.
Please let me know if you have any further questions.