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Proof & Practice is a health newsletter that bends with your life instead of breaking. Every Saturday, I share what the science says, the principle behind it, and the tools and skills to apply it your way — so your health habits finally stick. No perfection required. From a board-certified lifestyle medicine clinician.
Hello, my friends!
Do you like TikTok?
I don’t. I tried, but it feels too loud for me.
However, over the past few weeks, half my lifestyle medicine colleagues on LinkedIn started posting about something called "fibermaxxing" from TikTok.
I got curious enough to look into it.
Turns out this is one of the rare wellness trends that's actually backed by real science, and it happens to describe exactly what's already in my kitchen.
Today we're covering:
what fibermaxxing actually is and why the experts are into it,
the two anchor foods that make it effortless for me,
the pantry shortcuts that do the work when I don't have time to cook, and
why going slow matters more than going hard.
The trend the experts actually like
Fibermaxxing just means eating more fiber from food. That's it.
I’m genuinely glad this trend exists, because fiber has always been the boring nutrient nobody talks about.
Most people don't even eat enough of it.
The recommended intake is 25 to 38 grams a day depending on your gender. Most adults only get 10 to 15.
A meta-analysis (a study that pools results across many other studies) looked at 17 cohort studies and close to a million people. It found that every extra 10 grams of fiber a day was linked to a 10% lower risk of dying from any cause.
Not from one specific disease. It tracked death from any cause.
I'll admit the irony here.
I usually tell people that the fundamentals beat most optimization trends you see online.
But I think Fibermaxxing is an exception. It's just eating a food we've always known matters, taken seriously for once.
At work, I see the downstream effects of low fiber intake.
Blood sugar swings. Cholesterol that won't budge. Patients who assume their sluggish digestion is just "how their body is," when really it's a diet problem hiding in plain sight.
Yes, fiber touches almost everything. Which is exactly why it deserves more attention than a passing TikTok trend usually gets.
Pick one carb you already eat and batch it
My meals are boring on purpose. That's exactly why they've lasted for 4 years.
The trick is something I call an anchor food: the one high-fiber staple you build a meal around instead of reinventing something new each time, so everything else just rotates around it.
I'm Filipino, so rice is life. And I mean that literally. 😁
My two anchor foods are oatmeal for breakfast and brown rice for lunch and/or dinner. I don't reinvent either one daily.
I vary the toppings on the oatmeal for a little variety.
We batch-cook the rice, a big pot at a time, then reheat it as we go through the week. Me and my husband prepare different dishes to pair with it.
Sometimes we swap in red or purple rice, or mix in some black rice with the brown, mostly for variety, and because different rice varieties bring slightly different nutrients along with the fiber.
Before our baby arrived, we could meal prep enough food for five days at a stretch.
Now that she's starting to eat more solids, we've had to scale that down. Cook once, eat twice or thrice is our current rhythm.
It’s still meal prepping, but only in smaller batches.
Let the pantry do the work
Canned beans still show up in my kitchen regularly. I had some this week, actually.
When I don't have the time or energy to cook from scratch, the pantry and freezer do the heavy lifting.
Canned beans rinsed and added to whatever I'm already making. Frozen or pre-cut vegetables when fresh produce isn't going to happen.
None of this requires a recipe. You just got to have the stuff on hand before you need it.
This is the part you'll miss if you let fibermaxxing turn into a project, something to optimize and track and perfect. For you, maybe it's closer to stocking a pantry with a few reliable staples and reaching for them on repeat.
I keep the same three or four things in rotation: canned black beans and chickpeas, a bag of frozen broccoli, pre-cut carrots.
None of it is exciting, but all of it adds fiber to a meal in the time it takes to open a can.
Go slow, or your gut will remind you
Before I ever started eating more plants, I read some plant-based guides on how to transition.
The experts warned that adding fiber too fast causes bloating and gas. That made sense to me, so I followed the advice instead of learning the hard way.
I still got mildly bloated. It wasn't dramatic, but it was there for almost two months before it fully went away.
Now my gut is used to it and I don't notice anything at all.
What you can do
If you're going to add more fiber, add one moreserving of fruit, vegetable, or whole grain to a meal you already eat this week. Then add another serving per meal the week after. Don't overhaul everything all at once.
If you want the specific week-by-week plan I used with my husband when we made the switch, I wrote that up here.
And if the idea of eating "more plants" feels vague, I broke it down into something a lot more doable in the 30 plants a week letter. Herbs and spices count.
Track it once or twice if you're curious where you stand, but don't obsess over the number.
And one more thing, if you're starting from zero and want the whole on-ramp mapped out for you, The Plant-Based Fast-Start Guide walks through exactly what to buy, what to cook, and how to start, no meal-prep marathon required.
The "boring" nutrient turned out to be the one that matters most. Just don't rush it though.
To fiber and beyond,
Grazelle 🌱
BEFORE YOU GO
When you're ready, here are 2 ways I can help you:
1. The Dial Method — Get a consistency system that works on your worst weeks, not just your best ones. Five levels across five health pillars. Adjust instead of restart.
2. The Plant-Based Fast-Start for Busy Professionals — Get the no-perfection playbook for eating more plants without overhauling your life. Built for full schedules, not ideal weeks.