30-40 years ago, sugar wasn't in everything, or at least not in the levels it is found today. People also chuck down liquid sugar like there's no tomorrow, which is also something "new" that wasn't around 30-40 years ago.
People today are less active, eat much more calories, many in the form of sugar, and many in the form of fat.
The main problem is, even if you wanted to go back to a "1970s diet", you probably couldn't today. Processed food is everywhere.
Comments
It's probably a combination.
30-40 years ago, sugar wasn't in everything, or at least not in the levels it is found today. People also chuck down liquid sugar like there's no tomorrow, which is also something "new" that wasn't around 30-40 years ago.
People today are less active, eat much more calories, many in the form of sugar, and many in the form of fat.
The main problem is, even if you wanted to go back to a "1970s diet", you probably couldn't today. Processed food is everywhere.