Portion size: How much should you eat?

份量大小:你应该吃多少?

The Food Chain

2025-10-02

26 分钟
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单集简介 ...

How much food is the “right” amount - and why is it so hard to work that out? Ruth Alexander explores the world of portion sizes, starting with the rise of “portion distortion” in the United States, where supersized sodas and giant restaurant plates became the norm. Nutritionist Lisa Young explains how this shift happened, and what it’s meant for public health. In São Paulo, dietitian Marle Alvarenga shares new research comparing Brazil, France, and the US, revealing how culture and globalisation shape what feels like a normal portion. Why are French plates so much smaller - and meals so much slower - than in Brazil or America? And psychologist Lenny Vartanian in Sydney explains the powerful pull of portion size on our behaviour: why bigger servings make us eat more, even when we know better, and why education alone isn’t enough to change our habits. If you would like to get in touch with the show, please email: thefoodchain@bbc.co.uk Producer: Izzy Greenfield Photo: Three spoons showing different portion sizes (credit: getty)
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单集文稿 ...

  • This BBC podcast is supported by ads outside the UK.

  • Hello and welcome to the Food Chain from the BBC World Service.

  • I'm Ruth Alexander and this week we're focusing on portion size, how much we put on our plate,

  • how much we should put on our plate and why it's so difficult to get it right.

  • And I'm in my kitchen

  • because we're going to start by comparing portion sizes here in the UK with those in the United States.

  • And joining me from New York is my colleague Natalie Jimenez.

  • Natalie, hello, thanks so much for being with us today.

  • Thanks for having me.

  • Now, we have both been hard at work ordering ourselves takeout for lunch, haven't we?

  • And from the same fast food company, large chicken nuggets and fries,

  • and I'm very interested to know how many nuggets you've got.

  • I got 20.

  • I got double, so I got 40.

  • A little bit heavier than yours.

  • Yeah, well, I hope you're hungry.

  • fries.

  • I have been measuring these, I'll weight them,

  • and I have to be very precise 157 grams worth of fries.

  • So I have almost or up to 90 individual fries in this one packet,