I can agree with that, but then there's also sickle cell anemia.
That's a minor problem.
Regarding health issues, the black community has a much higher rate of smoking, as well as suffering from what all Americans suffer from: high sodium and high fat diets including too much red meat, lack of exercise, and a high consumption of processed food.
It's a prescription for heart attacks, high blood pressure, strokes and cancer. Throw in the disproportionally high incarceration rate (black men), drug use and the like and you've got a lower life expectancy.