From their website:
Karthein’s Organic Sauerkraut is obtained through the natural process of fermentation that creates beneficial probiotic bacteria. Unpasteurized Organic Sauerkraut is a new experience for most people, but it’s recorded use goes back 6000 years. Unpasteurized or raw cultured means the sauerkraut is never subjected to heat. High temperatures destroy naturally occurring digestive enzymes and beneficial bacteria such as various strains of lactobacillus.
Finding new “ready-to-eat” super food that tastes great and is actually healthy is difficult. Karthein’s Organic Unpasteurized Sauerkraut is prepared the old fashioned way in labour intensive small batches.