Canna-Tsu is a hybrid strain with two high-CBD parents (Cannatonic and Sour Tsunami). Sour Tsunami is derived from Sour Diesel and NYC Diesel.
The high CBD and other combination of cannabinoids seem to be beneficial for management of pain, spasms and anxiety.
Some High CBD strains are not stable and the ratio of TCH to CBD may vary under certain growing or handling conditions. Make sure you are getting products that are tested to confirm ingredient volumes for best results.
The popularity may be related to the effects on symptom relief and the fact that higher CBD products produce less cognitive disruption and therefore leave patients more functional and clear-headed.