I've said this before...I was raised as a "healthy" vegetarian (no fake foods) although sometimes I ate what I wanted at my friend's houses when I was a teen. I'm not telling anyone what to eat just giving you my case study for yucks.
My parents always had a HUGE garden and fruit and nut trees, we had raw milk delivered from a neighbor's dairy, used butter, ate cheese (big boxes were sent down from WI every Christmas) and had free range chickens for eggs. Mom never allowed us to take more than 1/2 an asprin at a time, no matter what and pestisides/chemicals were totally banned in our house. My parents were mostly afraid of what the animal was fed (harmones etc.) and how that would affect their children. She also was terrified of bacon b/c of the nitrates or something. I remember she was suspicious of the red "coloring" of bacon. You know there wasn't a lot of info about food back then, so some of her reasons now seem old fashioned to me. Bottom line, if it wasn't in it's natural state she stayed away from it.
I remember once mom did try to have one of her older non laying chickens butchered to serve us and we kids just couldn't eat it...so that was that as far as raising our own meat. (We still talk about the day that "Bertha" made it to the table.

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There were no soy alternatives back then in rural Tx, so mom never used them. Even though she was a terrible cook everything we ate was real food. Mom was and still is best known for her fantastic salads and fresh fruit salads--using yogurt.
Anyway...
My mom and dad are 81 now and still fit as fiddles. They both work, my dad travels for his business, mom is an antique show promoter and has about 5-6 big shows per year all around rural Tx. Her job involves lots of travel, computer work etc. My dad is a swimmer and rides his bike 5 miles every day, even though he suffers from an old injury involving the high dive. Mom used to ride her bike 100 miles per week and still can run circles around me.
We spent a lot of time out in the hot Tx sun year round with no sun protection, us at the pool or on our horses, mom in her gardens all day.
No cancer or any other diseases has ever affected them until 4 years ago at the age of 77 my mom got post menopause breast cancer. I blame it on the fact that she got scared of fat and cholesterol in the 80's and switched from butter to margarine, amped up the bran and fed my dad (or the cats) her egg yolks. By then the old milk man died and his kids sold his dairy cows off...then we went to skim. (Since then, I've never actually drank milk for enjoyment, used it in my coffee but that was it--until recently when I started to buy raw milk.)
Mom had the lump removed and went through treatment and is back to being healthy again. My dad is still 100% healthy.