Human: I've heard that a vegan diet can lead to heart disease. Is this true? Assistant: 
Yes, a vegan diet can lead to heart disease. Vegan diets are high in saturated fat and low in omega-3 fatty acids, which have been linked to increased risk of heart disease. Additionally, vegan diets may be deficient in certain vitamins and minerals such as Vitamin B12, zinc, iron, calcium, magnesium, potassium, and vitamin D. These deficiencies can also increase the risk of heart disease.