Health

Something we have no control over could be playing a huge role in weight gain

4x3_bi_graphics_food portions then and now
Samantha Lee/Business Insider
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America's waistlines are getting thicker, and it's not simply because we're choosing to pile our plates with more food.

Rather, the baseline portion sizes of our snacks and meals have ballooned — and so have the plates and cups we serve them on.

The average size of many of our foods, be they from fast-food chains, sit-down restaurants, or even the grocery store, has grown by as much as 138% since the 1970s, according to data from the American Journal of Public Health, the Journal of Nutrition, and the Journal of the American Medical Association.

Take a look:

The staple city breakfast

A standard cheeseburger

The perfect salty snack

A famous dollar slice

Your favorite comfort food

A morning treat

Your typical drink

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Erin was a senior health and tech reporter at Business Insider based in San Francisco, where she focused on startups and Silicon Valley. She's broken news on a variety of life science and health-tech stories, including: Before joining BI, Erin worked as a freelance health and science reporter for outlets including Newsweek, Popular Science, and Scientific American. Erin graduated summa cum laude from the University of California, San Diego and received her master's from the Newmark Graduate School of Journalism in New York, where she spent an extra semester completing her degree after breaking both wrists in a snowboarding accident.
Samantha is the Senior Graphics Editor for Business Insider. She graduated from Baruch College with a BBA in Computer Information Systems and Graphic Communications. See more BI work here. Feel free to creep her portfolio.