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cover of episode Fiber: The Secret to a Healthier, Happier You?

Fiber: The Secret to a Healthier, Happier You?

2024/10/31
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Science Vs

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J
John Cryan
M
Michelle Dang
W
Wendy Zuckerman
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Wendy Zuckerman: 我是Wendy Zuckerman,欢迎收听Science Verses播客。今天我们要探讨纤维素的真相。纤维素是一种常被忽视的营养物质,但最近它越来越受到关注,人们认为它对健康有很多益处,包括改善肠道健康、促进排便、增强精神健康、预防心脏病和癌症等。然而,大多数美国人每天摄入的纤维素不足,因此我们需要了解纤维素对健康的影响,以及如何摄入足够的纤维素。 Michelle Dang: 我是Michelle Dang,本期节目的制作人。我将与Wendy一起探讨纤维素对健康的影响。首先,我们都知道纤维素可以促进排便,这是因为纤维素是一种人体无法消化的碳水化合物,它可以增加粪便的重量和体积,并增加粪便的水分含量,从而使排便更容易。一项研究表明,摄入纤维素可以加快排便速度,平均缩短24小时。 Dr. Deirdre Mikkelsen: 我是一名微生物学家,我的研究表明,纤维素是肠道益生菌的主要食物来源。摄入足够的纤维素可以增加肠道益生菌的多样性和数量,从而改善肠道健康,降低患上肠漏症、肠易激综合征和结肠癌的风险。一项关于猪的研究表明,摄入纤维素的猪肠道益生菌数量和多样性都高于未摄入纤维素的猪。 Prof. John Cryan: 我是一名神经科学家,我的研究表明,肠道和大脑之间存在双向沟通,肠道微生物可能会产生神经递质,影响大脑功能。肠道微生物分解纤维素产生的短链脂肪酸可能通过血液到达大脑,影响神经元之间的交流,这可能有助于治疗抑郁症。然而,目前没有足够的证据证明纤维素可以治疗抑郁症。 Dr. Andrea Glenn: 我是一名营养学家,我的研究表明,粘性纤维可以减缓消化速度,从而减缓血糖上升速度,降低患心血管疾病的风险。粘性纤维还可以结合胆汁酸,从而降低胆固醇。一项研究表明,摄入富含纤维素的饮食可以降低患心血管疾病的风险。

Deep Dive

Chapters
This chapter explores the role of fiber in promoting healthy bowel movements. It explains how fiber adds bulk and moisture to stool, leading to easier and more frequent elimination. A study showing fiber's impact on bowel transit time is also discussed.
  • Fiber adds weight and size to stool.
  • Fiber's structure helps it retain water, softening stool.
  • Fiber can reduce bowel transit time by up to 24 hours.

Shownotes Transcript

We hear about fiber as the main ingredient for a good poo. But we’re starting to hear that it’s much more than that! Fiber is being hailed as a powerhouse nutrient, from powering up your gut and boosting your mental health to even helping with weight loss. So, does fiber really live up to the hype? We dive into the science with microbiologist Dr. Deirdre Mikkelsen, neuroscientist Prof. John Cryan, and nutrition scientist Dr. Andrea Glenn. 

Find our transcript here: https://bit.ly/ScienceVsFiber)

In this episode, we cover:

(00:00) Fiber is so hot right now

(02:16) How fiber helps you poo

(04:55) Fiber supercharges the gut 

(14:02) Can fiber help your mental health? 

(18:36) A goop for a healthy heart 

(24:52) Fiber and weight loss 

This episode was produced by Michelle Dang, with help from Wendy Zukerman, Meryl Horn, Rose Rimler, and Ekedi Fauster-Keeys. We’re edited by Blythe Terrell. Fact checking by Erica Akiko Howard. Mix and sound design by Sam Bair. Music written by Bobby Lord, Emma Munger, Peter Leonard and Bumi Hidaka. Recording help from Nick Kilvert. Extra thanks to Kafayat Yusuf. And thanks to Joseph Lavelle Wilson and the Zukerman family.

Science Vs is a Spotify Studios Original. Listen for free on Spotify or wherever you get your podcasts. Follow us and tap the bell for episode notifications. 

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