This absolutely true.
The poor in America cannot afford nutritional food, healthcare and they live in dire situations. Crime and gangs are rampant amongst poorer neighborhoods which leads to homicide and drug taking, both of which impact on the life expectancy of people.
https://sciencing.com/chemistry-important-study-anatomy-physiology-5147085.html
I'm almost positive that this is DNA. LMK if I'm correct.
Make a weekly shopping list. Buy lots of healthy fruits and veggies. Buy pre-cooked meats like grilled chicken or steak fajita strips. Once home, wash and chop all veggies. These can be combined in minutes into healthy salad or stir-fried for a quick meal.