What happened to those who abandoned the treatment diet, and switched over to the low-carb diet? Their condition significantly worsened. 40% to 50% more artery clogging at the end of the year. In heart scans of the patients, as seen in the above video, the yellow and particularly red areas represent blood flow through the coronary arteries to the heart muscle. The scan of one of the patients who went on a plant-based diet, shows how their arteries opened right up increasing the blood flow. Another person, however, started out with good flow, but after a year on a low-carb diet, they significantly clogged down their arterial blood flow.