What are the health risks of people who eat less staple food?

Studies have shown that people who eat less staple food have higher bad cholesterol and a greater risk of heart disease. Another study in the United States also shows that if you don't eat bread, noodles, potatoes and other staple foods for a week, your brain's memory and cognitive ability will be damaged. However, traditional Chinese medicine emphasizes "five grains for nourishment", and insufficient intake of staple food can easily lead to deficiency of qi and blood, deficiency of kidney qi, fatigue and hair loss.