Fibermaxxing, the trend of deliberately maximising daily fibre intake, is the latest. Every few months, wellness TikTok discovers something the scientific community has known about for decades. The difference this time is that the researchers aren't rolling their eyes.
Fibre has, quietly and without the marketing fanfare of protein or omega-3s, accumulated one of the strongest evidence bases in nutrition. And yet most people are getting roughly half the recommended daily amount. So when the internet finally starts paying attention, the gut health community is here for it.
Here's what the science actually says, and where the trend gets a little more complicated.
Why fibre matters more than your childhood self was told
The old story about fibre was simple: it keeps you regular. True, but the story has grown considerably. Research now suggests that a fibre-rich diet may play a role in supporting immune function, cardiovascular health, blood sugar regulation, and potentially even mood and cognition, largely through its effects on the gut microbiome.
We've written before about how sleep and the gut microbiome are connected in ways that might surprise you, in Is Your Gut Sabotaging Your Sleep? The fibre-mood axis runs through some similar pathways.
How to fibermaxx without the bloating
The most common side effect of dramatically increasing fibre intake is digestive discomfort: bloating, gas, and in some cases constipation. This tends to happen when people go from low intake to very high intake too quickly, without giving their gut bacteria time to adapt.
The approach that researchers and dietitians broadly support is gradual: add one or two new plant foods per week rather than overhauling your diet overnight. Drink plenty of water alongside fibre-rich foods. And focus on variety rather than hitting a specific gram target.
Curious whether your diet changes are actually doing anything for your gut?
Gutsi tracks your digestive patterns passively over time, so you can start to see what's shifting. Join the waitlist at gutsi.com.
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This content is for informational purposes only and does not constitute medical advice. If you have concerns about your digestive health, please speak to a healthcare professional.
