Fibermaxxing — you’ve probably seen the term on TikTok, in health headlines, or from wellness influencers layering oats, chia, and psyllium like it’s the next protein craze. But what does it actually mean—and is it worth the hype? In this episode of 1,000 Waking Minutes, Dr. Wendy Bazilian takes a thoughtful look at the fibermaxxing trend: where it came from, what the science really says, and how to safely—and sanely—add more fiber to your life. 

From the early days of “Uncle Sam” cereal calling itself a “natural laxative,” to the latest research connecting fiber to heart health, longevity, and even mental well-being, this episode brings clarity to a topic that’s as timeless as it is trending.

Dr. Bazilian unpacks why “more” isn’t always “better,” how to increase fiber safely, and why hydration and gradual change make all the difference. Whether you’re a fiber newbie or a lifelong bran devotee, this short, smart episode will help you understand what fibermaxxing really means for your 1,000 waking minutes each day. 

WE DISCUSS:

(00:00 ) Intro

(1:27 ) What “fibermaxxing” means—and why it’s trending

(3:30 ) The surprising story behind Uncle Sam cereal and the word “laxative”

(6:41 ) How much fiber is enough—and why “too much, too fast” can backfire

(7:27 ) What the science really says about fiber and longevity, heart health, and mood

(10:38 ) The right way to level up your fiber: food first, variety, and hydration

(13:07 ) Real-world examples to help you get more fiber without the hype

(17:32 ) Wendy’s take: Why balance and awareness beat extremes every time

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Thank you for tuning in to 1,000 Waking Minutes and being part of this journey–together. A huge thank you to our amazing collaborators including our production and marketing teams and Gabriela Escalante in particular. To the ultra-talented Beza for my theme music, my lifelong friend and artist Pearl Preis Photography and Design, to Danielle Ballantyne, Jen Nguyen, Joanna Powell, and of course, my family and everyone working tirelessly behind the scenes.

HEALTH DISCLAIMER:

The information shared in this podcast is for educational purposes only and should not be considered individual medical or health advice. Always consult with your trusted healthcare provider before making any changes to your diet, exercise, or medical treatment.

RESEARCH & REFERENCES

U.S. Department of Agriculture & U.S. Department of Health and Human Services. (2020). Dietary Guidelines for Americans, 2020–2025 (9th ed.). Washington, DC. https://www.dietaryguidelines.gov

Dietary Guidelines Advisory Committee. (2024). Scientific Report of the 2025 Dietary Guidelines Advisory Committee. Washington, DC: U.S. Department of Agriculture, Agricultural Research Service. https://www.dietaryguidelines.gov/resources/2020-2025-dietary-guidelines-online-materials

https://www.dietaryguidelines.gov/sites/default/files/2021-03/Dietary_Guidelines_for_Americans-2020-2025.pdf

U.S. Department of Agriculture, Economic Research Service. (2023). Food Consumption and Nutrient Intakes Data. Washington, DC. https://www.ers.usda.gov/data-products/food-consumption-nutrient-intakes-and-diet-quality

Mirrafiei, A., Jayedi, A., & Shab-Bidar, S. (2023). Total and different dietary fiber subtypes and the risk of all-cause, cardiovascular, and cancer mortality: a dose-response meta-analysis of prospective cohort studies. Food & function, 14(24), 10667–10680. https://doi.org/10.1039/d2fo04024g 

https://pubs.rsc.org/en/content/articlelanding/2023/fo/d2fo04024g 

Fu, L., Zhang, G., Qian, S., Zhang, Q., & Tan, M. (2022). Associations between dietary fiber intake and cardiovascular risk factors: An umbrella review of meta-analyses of randomized controlled trials. Frontiers in nutrition, 9, 972399. https://doi.org/10.3389/fnut.2022.972399

https://www.frontiersin.org/articles/10.3389/fnut.2022.972399/full

Yang, M., Cai, C., Yang, Z., Wang, X., Li, G., Li, J., Liu, J., & Zhang, Z. (2024). Effect of dietary fibre on cognitive function and mental health in children and adolescents: a systematic review and meta-analysis. Food & function, 15(17), 8618–8628. https://doi.org/10.1039/d4fo02221a  

https://doi.org/10.1039/D4FO02221A   

Chen, X., Tao, L., & Wang, Y. (2025). Association of dietary fiber intake with all-cause and cardiovascular mortality in diabetes and prediabetes. Diabetology & metabolic syndrome, 17(1), 231. https://doi.org/10.1186/s13098-025-01810-9  https://dmsjournal.biomedcentral.com/articles/10.1186/s13098-025-01810-9

Barber, T. M., Kabisch, S., Pfeiffer, A. F. H., & Weickert, M. O. (2020). The health benefits of dietary fibre. Nutrients, 12(10), 3209. https://doi.org/10.3390/nu12103209 

https://www.mdpi.com/2072-6643/12/10/3209