Potato juice is an excellent prevention of gastritis.
And it reduces the likelihood of diabetes, normalizes blood pressure, cleanses the skin and is cancer prevention.
Wash the potatoes and cut off the peel all the green areas and the eyes. Grate the potatoes on a grater. Wrap the resulting slurry in a clean thin cloth and squeeze the juice.
The juice should be fresh prepared in store soon loses much of its beneficial properties.