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And old folks often have very poor diets. That may be why a simple cold can put them in the grave. Interesting thing: Back in the height of the industrial revolution, when many inner-city kids were getting rickets for lack of sunshine, doctors found they did not die from broken bones. They died from pneumonia.
There is a strong correlation between good diet and health. That connection may include getting enough zinc and getting enough quercetin from vegetables for the zinc to get into your cells.
Vitamin C increase iron absorption. So cooking spaghetti sauce with fresh tomatoes in a cast iron skillet is an ideal practice.
Old folks who cook spagetti sauce from scratch probably don't have bad diets. Add some meatballs to it and you don't have to mess up the seasoning on your cast iron cookware with acidic foods. Add some onion and it's loaded with quercetin. Iron is readily available. Zinc is easy to get. Quercetin is in everything except meat.
But the more processed the food is the less nutritious it is. Most of the food in grocery stores today are heavily processed and that's what most of America is eating. About the same as the gruel fed to those child laborers with rickets.
