Smoking is seriously implicated in heart disease and accounts for many deaths from lung and other cancers.
Controversy continues over cholesterol and how much and what kind of fat to eat.
A multi-vitamin and mineral supplement may provide some insurance. Improving fitness is like quitting smoking from a health standpoint. In a new study at Tufts University, a year of strength training increased bone density, strength, gait and balance in healthy women ages 50 to 70. For non-workers, volunteering, taking courses, or traveling can provide stimulation. Animal research is showing that mental activity promotes mental function.