Konnyaku prevents high blood pressure naturally, without medicine.
The study below shows that Glcomannan in Konnyaku lowers the blood pressure.
Konnnyaku-mannan and blood pressure of rats (Tsuji 1987 )*
Note
*. Tsuji, K. & Tsuji, E., Kennkoushoku Konnyaku. p.70.
(1985)