When people with high blood pressure did a supervised water-only fast and plant-based diet, most side effects were minor and nothing serious happened.

93% of people with high blood pressure stayed in the study for six weeks after doing a water-only fast and plant-based diet.

During the fasting part of the diet, heart rate went up a bit but not enough to be a health concern.

People with high blood pressure who did a water-only fast followed by a plant-based diet saw their blood pressure drop to normal levels and stay that way for at least six weeks.

People with high blood pressure who did the fast and diet didn't have any concerning changes in body temperature.

Overweight or obese people with high blood pressure lost about 5.2 kg (6% of their starting weight) after a water-only fast and plant-based diet, and kept the weight off for six weeks.