Interestingly, some of the biggest egg eaters in the world, the Japanese, have low cholesterol and heart disease rates, in part because they eat a diet low in saturated fat. In contrast, Americans eat eggs alongside sausage, bacon, and buttered toast.
"The amount that one egg a day raises cholesterol in the blood is extremely small," says Walter Willett, professor of epidemiology and nutrition at Harvard's School of Public Health. "Elevations in LDL (bad) cholesterol of this small magnitude could easily be countered by other healthy aspects of eggs."
Potatoes have been blamed for increasing blood glucose levels, insulin resistance, excess weight and Type 2 diabetes. A recent Harvard study that followed large populations and their disease rates linked potato eating with being overweight, blaming it on the blood glucose rise.
But many foods, including whole-wheat bread and whole-grain cereals, cause similar spikes in blood glucose, and are correlated with superior health and lower body weights. How could the higher body weight in the Harvard study be explained?
The study lumped all potato products together, including potato chips and french fries, very fattening versions of potatoes usually eaten in large portions alongside hamburgers, hot dogs, and sodas.
"It's an easy food to attack; but the meal pattern may be the culprit," said David Baer, a research leader at the Agricultural Research Service of the Department of Agriculture. "Other epidemiological studies have not verified a connection between potatoes and weight gain or any diseases, and no clinical studies have shown a connection."
Potatoes are a great source of potassium, Vitamin C and fiber that many cultures — Scandinavians, Russians, Irish, and Peruvians — relied on as a nutritious staple for centuries. And they were not fat.
People often ask me if fruit is too high in sugar, especially for diabetics. This fear of fruit, I believe, is left over from the Atkins craze, which discouraged eating some fruits on the grounds that they are high in carbohydrates.