About the Sweetener Molecule
Reb M is a rare molecule found on the stevia plant. It’s the sweetest part of the plant, but it’s difficult to extract. So more sweeteners end up as a blend of the different stevia molecules with a lot of impurities, causing an unpleasant aftertaste.
Other companies that produce Reb M use traditional processing methods, which are costly and in many cases involve the use of petrochemicals or even high-fructose corn syrup. Besides the environmental issues associated with those purification methods, they haven’t produced sweetener the comes close to the great taste of ours.