Read the following passage and answer the question: Vegetarian diets reduce the risk of chronic illnesses. Lacto-vegetarians often enjoy significantly...

Read the following passage and answer the question:

Vegetarian diets reduce the risk of chronic illnesses. Lacto-vegetarians often enjoy significantly better health compared to meat eaters, though it is unclear if this benefit applies equally to vegans. Diets rich in whole grains, nuts, fruits, and vegetables are low in saturated fats and cholesterol but high in fiber, vitamin C, folate, potassium, magnesium, and phytochemicals that help protect against various diseases. Such diets also reduce the risk of hypertension and type 2 diabetes. Conversely, diets low in fiber and high in chicken and meat can greatly increase colorectal cancer risk. Plant foods contain polyphenols and more polyunsaturated fatty acids, which support brain health during aging. Vegetarian diets may aid weight loss, long-term weight management, and are linked to longevity. Animal-based diets tend to be higher in fat and calories, while plant-based diets are nutrient-dense but low in energy. However, very restrictive diets may lack essential nutrients. The American Dietetic Association states that well-planned vegetarian diets are healthful, nutritionally adequate, and beneficial for disease prevention and treatment, suitable for all life stages and athletes. Only the most restrictive vegan diets might cause nutritional deficiencies in calcium, iron, zinc, vitamin B12, and sometimes protein. Vegetarian meals can be diverse and enjoyable. For those not fully vegetarian, reducing animal food intake and increasing fruits and vegetables is a healthy choice. Einstein said, “Nothing will improve human health and increase chances for survival of life on Earth as much as the evolution to a vegetarian diet.”

Question: How does proper planning contribute to a vegetarian lifestyle?