Protein had a good run. For the better part of a decade, it was the nutrient that launched a thousand supplement brands, dominated grocery aisles, and gave every influencer something to count. Now fiber has taken its place, and the takeover is happening at TikTok speed.

The trend is called fibermaxxing — loading every meal with as much dietary fiber as physically possible. Posts tagged #fibermaxxing and #fibremaxxing have been viewed more than 150 million times on TikTok. The videos follow a formula: soaked chia seeds, mountains of cruciferous vegetables, avocado on everything, and earnest voiceovers about gut microbiome diversity. CNN reported in January that Gen Z's fixation on stomach health is driving the movement, with the GLP-1 drug boom making people newly aware of how digestion shapes everything from weight to mood. [1]

The science is catching up to the enthusiasm. A Tufts University study published March 8 confirmed that high-fiber diets produce measurable changes in gut microbiome composition within weeks, supporting immune function and metabolic health in ways that isolated supplements do not replicate. The researchers noted that the fibermaxxing trend, for all its social media excess, is pointing people toward a genuinely under-consumed nutrient — the average American eats about 15 grams of fiber daily, roughly half the recommended intake. [2]

Whole Foods named fiber the top food trend of 2026. The Economist asked in February whether you should be "fibremaxxing." The answer from the clinical literature is a qualified yes — with the caveat that cramming 60 grams of fiber into a single smoothie is a recipe for gastrointestinal distress, not longevity.

-- PRIYA SHARMA, Delhi