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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Comment & Join the conversation! Share your thoughts or questions by visiting wendybazilian.com or connecting with me on social media.

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   

Fiber maxxing, call it what

you want, but the bottom

line is we do need

more fiber.

So if it helps us

rethink how much we get,

why it matters, and how

to do it safely, which

I'll walk you through as

we talk about this trend,

maybe it's a trend worth

paying attention to.

We experience 1,000 waking minutes

on average every day.

How are you spending yours?

I'm Dr. Wendy Bazilian, and

you're listening to 1,000 Waking

Minutes.

I can't wait to connect

with you here with practical

ways to eat well, move

daily and be healthy, to

optimize every waking minute you

live for a happier, healthier

life.

Thank you for sharing some

of your waking minutes with

me today.

Let's get started.

It's gonna be okay, yeah.

Hello, and welcome to 1,000

waking minutes.

I'm Dr. Wendy Bazilian, and

I'm so glad you're joining

me today.

Every day, we get around

1,000 waking minutes, and it's

how we use them in

our moments, our meal to

meal, our walks, and all

our choices that add up

to a well-lived life.

Today, I'm going to be

talking about a trend, and

it's called fiber maxxing.

It's something that's getting new

attention, but has deep roots

in nutrition and health.

Fiber, specifically this trend, fiber

maxxing.

It sounds like a made

up marketing term, and it

sort of is just a

made up term.

It's got two X's, 'fiber

maxxing', but it's caught on

in wellness spaces.

It's caught on in clinical

environments, it's caught on in

TikTok and Instagram spaces, and

also in the fitness realm

as well.

Have you heard of it,

fiber maxxing?

Well, it's sort of like

the return of certain fashion

statements, wide leg pants, or

maybe even sourdough starter, as

if that's new.

But in the pandemic, it

became new and trendy, and

there were new takes on

it.

Things that are long established,

but certainly, and especially, start

reappearing every few years, especially

those things that have been

around a long time, and

they're discovered with fresh new

eyes or a new perspective.

In this case, it's fiber.

It's not new, it's not

flashy, and suddenly it's back

in the spotlight, and it's

getting a lot of attention.

So maybe you've noticed it

also.

It's all over social media.

It's on supplement labels now.

Maybe you've been hearing about

it, chatting with friends over

the dinner table.

People who have started really

trying to go aggressively toward

the fiber goals, they're stacking

their fiber, chia, psyllium, oats,

all together, meal after meal

after meal.

Almost like it's the next

protein craze, if we could

have another mega trend.

My clients are talking about

it.

The magazine stories are covering

it.

Dietitians are talking about it.

And yes, some cereal boxes

are even getting bold again

in their fiber claims.

Speaking of cereal, I brought

that up in specific because

I wanted to share a

story that I've shared probably

before, even on the podcast,

certainly many times over the

years, and it's about cereal.

Uncle Sam cereal, which is

still a cereal that's on

the market today.

But in the early 2000s,

so almost a century after

it had originated, I can't

remember the exact date when

it started.

I used to know that

number.

But after a century of

being in production, Uncle Sam

cereal advertised itself on the

box as a natural laxative.

The word 'laxative' was right

there on the box.

Euphemistically, of course, they were

talking about fiber and they

were talking about digestive health

and helping our gut move.

We've been seeking fiber.

But these days, fiber is

the euphemism for maybe laxative

or for heart health or

other reasons as well.

But would you want the

word laxative at the breakfast

table?

I don't think so.

So you won't find laxative

on food products anymore, to

my knowledge, anyway.

But you will definitely see

that word fiber.

Those are things of different

times, for sure.

But it's a reminder that

we've been talking about fiber

for over 100 years.

What's changing now is how

we talk about it and

maybe even how we feel

about it.

Of course, there's lots of

science involved.

So is this fiber maxxing

trend worth our attention?

Is it helpful?

Is it hype?

Is it a little of

both?

So when we get into

what fiber maxxing really is

and why the timing, why

right now, I like to

think about it as how

foods function, functional foods or

better for you foods.

And of course, how do

you make it work within

your 1,000 waking minutes?

So what is it and

what it is not?

Let's think about that for

a second.

First thing first, fiber maxxing

is not a scientific term.

You will not find fiber

maxxing in any medical journal

or in any nutrition guidelines

of peer-reviewed literature.

It's a cultural phrase.

And it's part of the

mix that social media has

garnered attention.

But it is a little

bit of social media meat

science.

And the idea is pretty

simple.

Get more fiber.

But lately, it's become competitive.

And those of you who

have listened before know how

I feel about that.

We talked about raw dogging

on planes and the competitive

nature of being mindful.

But people who are maxxing

out their fiber intake grams

or stacking them, layering their

powders and chasing the numbers,

you know, their goals for

the day.

And sort of bragging rights

about how they're going about

it.

Looking for more fiber in

the diet?

I guess that's progress.

Because the reality is Americans

aren't getting enough.

In fact, most of us

are falling short.

According to the dietary guidelines

for Americans, over 90%

of women and 97%

of men don't get the

daily recommendation of fiber.

And it has been confirmed

that about only 6%

of us as an American

population actually meet the daily

goals.

So yes, we do need

more fiber.

But how you get there

matters too.

Because as with many trends,

the pendulum swings.

It swings from not enough

to too much or too

fast, as the case may

be with fiber.

So what does the science

say?

Here's what's real and relevant

to this story.

In terms of longevity and

disease risk, a 2023 systematic

review and meta-analysis looked

at more than 40 studies.

And it was published in

Food and Function, if you're

interested in looking that up.

And the researchers found that

higher fiber intake was associated

with lower risk of dying

from any cause, and especially

from heart disease and cancer.

So in plain terminology, people

who eat more fiber tend

to live longer and healthier

lives.

What does fiber say about,

what is the relationship of

fiber and the research say

about fiber and cardiometabolic health?

So another large umbrella meta

-analysis, so this is an

umbrella analysis is an analysis

of analyses, of meta-analyses,

published in 2022 in the

Frontiers in Nutrition journal, examined

how fiber influences blood sugar,

cholesterol, and blood pressure, so

cardiometabolic markers.

And they found measurable improvements

across populations.

So fiber doesn't just keep

things moving, that so-called

laxative effect, but it does

help also stabilize what's happening

inside, in our blood vessels,

inside our gut.

It's sort of like a

built-in traffic controller of

sorts for your metabolism.

It can slow down the

rush, it can smooth the

flow, and it can help

things keep steady and you

satisfied.

And finally, what about the

relationship of fiber to mental

health and the gut-brain

connection?

You may have heard about

the gut-brain axis.

So newer research, a 2024

systematic review of meta-analysis

that was published in Food

and Function, saw a link

between fiber intake and mental

well-being, and it was

likely through this gut-brain

axis.

This review focused on children

and adolescents, with a sample

size of over 4,600,

with observational data showing a

49% lower odds of

depression symptoms in higher fiber

consumers.

The adult intervention evidence is

still emerging in this space,

but in general, people with

higher fiber diets often report

better mood and resilience.

Isn't that interesting?

So it's not magic, but

it's one more reminder that

what's happening in the gut,

gut feeling of sorts, doesn't

just stay in the gut.

It has impact.

So the evidence on fiber,

soluble, insoluble fiber, is solid.

The term fiber maxxing is

a trendy term, but the

science behind more fiber in

the diet is real, and

it's longstanding.

I can get behind this

trend with a few cautionary

suggestions.

So anyone who's gone from

five grams a day, let's

say you're eating five grams

a day, to 40 overnight,

would know that your body

will start noticing that.

And that gets into the

how much, how fast, how

much is enough, and what

does maxxing really mean?

So this is where the

nuance comes in.

Research supports higher fiber intake,

but not limitless fiber and

not a lot of fiber

all at one time.

In fact, studies show benefits

up to a point and

then a plateau.

The Dietary Guidelines for Americans

recommends about 25 grams of

fiber per day for women

and about 38 grams per

day for men.

And that nets out to

about 14 grams for every

1,000 calories consumed.

So I think that's a

good benchmark, about 14 grams

of fiber for every 1

,000 calories consumed.

However, going from not zero,

but a lower number to

a high number, too much

too soon can lead to

bloating, discomfort, especially if your

body is used to a

low fiber diet.

So it's really less about

maxxing and more about leveling.

I like the idea of

leveling up gradually and with

intention.

So thinking about this plateau

and digestive adaptation over time,

and some individuals who may

be on a low fiber

diet or may have irritable

bowel syndrome or may have

a flare up of diverticulitis,

they don't want to be

fiber maxxing anyway.

They need to be in

the lower fiber bracket until

they're given clearance and with

guidance to consume fiber at

the level that's appropriate for

them.

So a 2023 analysis in

the Journal of Translational Medicine

found a threshold effect of

people who are living with

diabetes and prediabetes, meaning that

the benefits seem to level

off around our recommendation.

Surprise, surprise.

Around about 26 grams of

fiber a day, according to

one study.

Not meaning that more would

be bad, but it reminds

us that the curve of

benefit can flatten.

So maxxing doesn't mean limitless.

But maybe how we allow

our gut microbiome to catch

up and adapt.

And certainly an important tip,

if you are starting to

increase your fiber from fruits

and vegetables, whole grains, nuts,

seeds, beans, legumes, you want

to hydrate adequately and increase

the hydration as you're leveling

up or increasing the fiber.

So a simple place to

start if you are interested

in fiber leveling up, even

though it doesn't sound as

sexy or trendy as fiber

maxxing, but let's go with

fiber maxxing.

If you're interested in increasing

your fiber, is adding one

more serving of fiber-rich

food a day for a

period of time and then

adding more incrementally as your

body adjusts and adapts?

A piece of fruit, some

lentils, a tablespoon of chia

or a handful of walnuts,

and then pay attention.

Notice how you feel, digestively,

energetically.

How's your energy?

Even mentally, think about your

mood.

Is there an impact?

Do you notice anything?

Pause, have awareness, see where

the real change starts to

happen.

And it definitely will.

Fiber has so many positive

links to our health.

So how do you bring

this trend into your life

without turning it into another

rule to follow?

Well, number one, think food

first.

Seek your fiber and foods.

I mentioned whole grains and

beans and veggies and fruits,

nuts and seeds.

Those are your foundation.

Think of oatmeal, the overnight

oats that are still trendy,

a salad with beans or

lentils, roasted vegetables, whole grains

like quinoa or whole grain

pastas.

Fiber supplements can help fill

a gap.

They may be something to

add to a fiber-rich

food first diet, but they

don't replace the synergy, the

matrix, the many nutrients in

real food.

Number two, increase gradually and

hydrate.

I can't emphasize this enough.

If you go from 10

grams, 40 overnight, you will

feel it.

And I don't mean in

a good way.

Add a little more each

week.

Pay attention.

Add around three to five

grams every few days, a

plus-up of three to

five grams.

And drink plenty of water

so your gut can process

and keep up.

It's adjusting too.

So maybe sprinkling chia or

flax on your yogurt or

adding an apple or a

handful of some snap peas

or fiber-rich vegetables into

your snack routine.

It's about consistency and routine

and let your body, give

your body time to adapt.

Number three, mix it up.

Don't just focus on one

type of fiber.

Definitely don't just focus just

on a supplement, but different

fibers do different jobs.

So different foods have insoluble

and soluble fiber, but even

within them, mix it up.

Some feed beneficial bacteria.

Some help with the lowering

of cholesterol.

Some help steady your blood

sugar.

Some help with the motility

or movement and bulking within

your digestive system.

So variety, the spice of

life, but variety wins here.

Think oatmeal and berries together,

paired or mashed avocado, which

is a good source of

fiber on whole grain toast.

Think lentil or lentil soup

or chili or different kinds

of soups and stews.

Add chia oil or chia

seeds into a smoothie or

bean dips at snacks, maybe

instead of ranch dressing and

add those colorful vegetables and

some walnuts at dinner.

So a mix of soluble

and insoluble fibers can help

balance your digestive system and

your metabolic health.

And finally, number four, pay

attention to how you feel.

This may seem obvious, but,

you know, being more regular

is good, but also notice

your energy, your focus, and

your mood.

When you add more fiber

rich foods, see if you

notice steadier energy between meals

or easier digestion over time.

Fiber is really like, like

the quiet hero.

It like sort of exists

in the background and how

we function each day.

And maybe that's why it's

having a comeback moment because,

you know, we've had so

many flashy trends.

Maybe we're ready for something

that works, that's real and

that can last.

So here's my take.

Fiber maxxing, it might sound

like the latest shiny trend,

and yes, it's marketing language

and not science, but in

this case, the buzz about

it isn't entirely misplaced.

Given how far below the

recommendations most people are, a

little extra attention to fiber

isn't such a bad thing.

More isn't automatically better, especially

not all at once, but

incrementally that three to five

grams increase every several days

and pay attention.

How do you feel?

That's where the real win

comes in from the small,

steady shifts up, swapping in

whole grains and fiber rich

foods, adding that apple or

more beans into the mix

and keeping a balance that

your body feels good about

and you can live with.

So not maxing out.

It's about showing up for

your body and being aware

of fiber.

So when you hear the

term fiber maxxing, you can

maybe smile aloud, smile aloud

or smile internally.

Maybe not so much so

fast, but I get the

idea and I'm on board.

If it inspires a positive

step in the right direction,

I'll take it.

And maybe we skip the

hype and we go for

balance and the long game,

as you know.

So that's my take on

fiber maxxing.

Thank you for sharing a

few of your waking minutes

with me today as we

explored the power of fiber

and the real meaning behind

this trend.

If you enjoyed this episode,

please share it, leave a

kind comment or tell a

friend.

You can find me at

wendybazilian.com and please join

at Instagram at @1000WakingMinutes.

I'm Wendy Bazilian, your host

and partner on this journey

of life.

And you've been listening to

1,000 Waking Minutes.

Until next time, be well.

Thank you for tuning in

to 1,000 Waking Minutes.

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 and to you,

our valued listeners.

I so appreciate your support.

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1,000 Waking Minutes each day.

I'm saying yes to better

days, yes, I'm on my

way, yes, it's gonna be

okay, yeah.

I'm saying yes to better

days, yes, I'm on my

way, yes, it's gonna be

okay, yeah.