What's the difference between Charlotte's Web Maximum Strength and Original (previously known as Advanced)? Our Maximum Strength CBD hemp oil is CO2-extracted while our Original Formula continues to be IPA-extracted. Have more questions? Submit a request 1 Comments Date Votes 0 sarturiusa746 August 09, 2019 18:01 Are you going to extract with water? CBD INFUSED beverages? What is IPA extraction? Please sign in to leave a comment.