My mom never used margarine, drank real coke, loved chocolate, used real sugar, used bacon fat to fry in, whole milk, loved lunch meats and always served meat centered meals. She lived until 93. Her sister did the same, but added one beer each night to the routine. The beer must have worked she lived to 97.
Your story reminds me. My Great Grandmother raised us pretty much, and she had for lunch EVERY DAY PB & Grape Jelly sandwich on wheat with a can of Pabst. Great Grandfather had been an employee for years of Pabst, so that’s why that brand. She lived to 98.