eli5 why we have such complex dietary requirements. Did our ancestors thousands of years ago have extremely well balanced diets?
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Well there was no freezing/shipping of foods from the other hemisphere so they ate local food. There were no factories producing packaged food and companies like Kraft processed food or in some cases creating food from chemicals.
So they lived off the land. However, they also had far lower life expectancy due to diet, healthcare, living conditions I don’t think they were better off and maybe life was more stressful. Availability of food is a stressful situation.
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