Fibremaxxing: The TikTok Trend Boosting Gut Health & Why You Need 30g Daily

Fiber, alongside fats and protein, is a nutrient essential for daily bodily function. While protein often dominates conversations around strength and muscle building, and healthy fats are increasingly recognized for their importance, fiber has historically received less attention. That began to change in 2025, as awareness of its benefits surged.

Recent statistics indicate a significant gap in fiber intake. Data suggests that 96% of the UK population isn’t consuming enough fiber, according to the latest national diet survey. This realization coincided with the rise of “fibermaxxing” on TikTok, a trend focused on increasing daily fiber intake to improve gut health, support weight management, and more. Videos tagged with #fibermaxxing have garnered tens of millions of views and likes, often showcasing meals packed with fiber-rich foods and detailing their nutritional content.

Fibermaxxing isn’t simply a fleeting social media trend; it’s gaining recognition from health professionals. Registered dietitian Lauren Manaker noted that fibermaxxing is “something actually worth trying,” given that most Americans aren’t getting nearly enough fiber in their diets. The Dietary Guidelines for Americans recommend adults consume 22 to 34 grams of fiber daily, depending on age and gender, yet over 90% of women and 97% of men in the United States fall short of this recommendation.

What is Fibremaxxing?

At its core, fibermaxxing is the practice of strategically increasing daily fiber intake to meet or exceed recommended levels. While the UK guideline is around 30 grams per day, many enthusiasts aim for 40-50 grams. It’s not about restriction, but rather creatively incorporating fiber-rich foods into meals and snacks. Examples include swapping white toast for seeded sourdough with avocado and hemp hearts, or choosing chia pudding over less fiber-rich desserts.

You’ll see multiple types of fiber, broadly categorized as fermentable and insoluble. Fermentable fibers nourish the digestive system, while insoluble fiber contributes to bulk and softens stool. The benefits extend beyond digestion; fiber plays a role in stabilizing blood sugar levels, supporting metabolism, and strengthening immunity. When beneficial bacteria in the gut feast on soluble fiber, they produce short-chain fatty acids, particularly butyrate, which fuel the gut lining and are linked to improved mood and metabolic health.

Why is Fibre Intake So Important?

Increasing fiber intake offers a multitude of health benefits. Fiber isn’t just fundamental for digestion, weight management and gut health, it can also help stave off diseases and is key when it comes to immunity. It slows gastric emptying and carbohydrate absorption, which reduces post-prandial blood sugar and supports a healthier insulin balance. Its bulking effect increases the feeling of fullness, potentially aiding in weight management. Consistent high-fiber diets are associated with lower calorie intake, less weight gain, and easier weight maintenance.

Are There Any Drawbacks to Consider?

While low fiber intake is linked to increased risk of type 2 diabetes, cardiovascular disease, colorectal cancer, and impaired gut health, drastically increasing fiber intake too quickly can cause discomfort. A sudden increase can lead to changes in bowel function and gas as the microbiome adapts. It’s important to note that the microbiome can take time to adjust to a significant increase in fiber.

How to Increase Your Fibre Intake

Experts recommend a gradual approach to increasing fiber intake, starting slowly with a variety of fiber sources. Hydration is also crucial, as fiber absorbs water in the gut. Focusing on whole foods like fruits, vegetables, oats, brown rice, lentils, seeds, and nuts is preferable to relying on convenience foods with added fiber. Prioritizing variety is key, as different types of fiber offer unique benefits.

Simple changes, such as opting for overnight oats with berries, seeds, and nuts for breakfast, or replacing a processed sandwich with a fiber-rich salad, can significantly boost daily intake and support gut health.