Canola oil is generally not harmful when taken in moderation, but long-term overdose may cause cardiovascular harm, leading to myocardial degeneration, lower cardiovascular function, and increase the risk of cardiovascular and cerebrovascular diseases. 1. Lead to cardiomyopathy: Canola oil contains a large amount of erucic acid, which is a long-chain fatty acid, and a large amount of eating can lead to myocardial fibrosis, cause myocardial fat deposition, leading to myocardial pathology. 2. Decrease cardiovascular function: Canola oil consumption by patients with cardiovascular and cerebrovascular diseases can make myocardial fat deposition and cause thickening of blood vessel wall leading to cardiovascular function overload and function decline. 3. Increase the risk of cardiovascular and cerebrovascular diseases: Canola oil contains erucic acid substances, hypertension, coronary heart disease patients consume too much, can cause fat deposition, leading to heart damage, increase the risk of cardiovascular and cerebrovascular diseases. Canola oil is generally not recommended for patients with cardiovascular and cerebrovascular diseases, such as excessive consumption of discomfort, it is recommended to consult a doctor in a timely manner, and actively cooperate with the doctor’s treatment.