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Metabolism in US Is Declining

Analysis by Ashley Armstrong

declining metabolism usa

Story at-a-glance

  • Americans today have significantly lower metabolic rates than their ancestors did, despite similar calorie consumption. In the 1940s Minnesota Starvation Experiment, lean men maintained their weight on 3,500 calories per day with moderate activity, while modern calculators suggest they should need only 2,000 to 2,400 calories

What is the recommended vitamin D blood level range for optimal mental and physical health according to the article?

  • 20 to 40 ng/mL
  • 40 to 60 ng/mL
  • 60 to 80 ng/mL

    Maintaining vitamin D levels between 60 to 80 ng/mL supports neurotransmitter regulation, reduces inflammation, and promotes neuroprotection, contributing to better mental and physical well-being. Learn more.

  • 80 to 100 ng/mL
 

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