What exactly is fiber-maxxing?
Fiber-maxxing is a simple dietary approach: consuming as many fiber-rich foods as possible each day. No complex calculations, no strict diet. Just one golden rule: prioritize fruits, vegetables, legumes, and whole grains at every meal.
Originating on TikTok and driven by Gen Z, this trend responds to a well-established medical fact: most of us do not eat enough fiber. In France, the recommendation is 25 to 30 g of fiber per day, but the actual average is only around 17 g.
Why is fiber so important?
Dietary fiber is much more than just “roughage.” It plays a key role in many of your body's mechanisms:
- Gut health: it feeds the beneficial bacteria in your microbiome, reducing inflammation and improving digestion.
- Appetite control: fiber increases feelings of fullness, naturally helping you avoid snacking.
- Blood sugar regulation: it slows down sugar absorption into the bloodstream, preventing blood sugar spikes.
- Cardiovascular protection: a high-fiber diet is associated with a reduced risk of heart disease.
- Weight management: by promoting satiety and reducing calorie absorption, fiber is a natural ally against weight gain.
Soluble vs. insoluble fiber: what’s the difference?
There are two main types of fiber, and both are necessary:
- Soluble fiber (oats, apples, legumes) dissolves in water and forms a gel that slows down digestion. It is particularly effective at controlling blood sugar levels and lowering LDL (bad) cholesterol.
- Insoluble fiber (wheat bran, green vegetables, seeds) speeds up intestinal transit and prevents constipation.
The best approach? Vary your sources to benefit from both types.
The best foods for fiber-maxxing
Here is a list of the top fiber-rich foods to easily incorporate into your diet:
- 🥑 Avocado: around 7 g of fiber per 100 g
- 🫘 Chia seeds: up to 34 g per 100 g
- Cooked lentils: around 8 g per 100 g
- 🧭 Black beans: around 9 g per 100 g
- 🌾 Oats: around 10 g per 100 g
- 🍦 Raspberries: around 7 g per 100 g
- 🥦 Broccoli: around 3 g per 100 g (but great for diversity)
- 🌰 Almonds: around 12 g per 100 g
How to add more fiber without turning your habits upside down?
The key to successful fiber-maxxing is gradual progression. Increasing your fiber intake too quickly can cause bloating and digestive discomfort. Here are a few practical tips:
- ✅ Swap white bread for whole-wheat or multigrain bread.
- ✅ Add a tablespoon of chia seeds to your morning yogurt or smoothie.
- ✅ Include a serving of legumes (lentils, chickpeas) in at least one meal a day.
- ✅ Keep the skin on fruits and vegetables whenever possible.
- ✅ Drink plenty of water (at least 1.5 L per day) so the fiber can do its job properly.
- ✅ Increase gradually over 2 to 3 weeks to let your gut microbiome adapt.
Fiber-maxxing: beware of excess
While fiber is beneficial, consuming too much (over 50 g/day) can lead to digestive discomfort, bloating, or even reduce the absorption of certain minerals like iron and zinc. The goal isn't to break a record, but to reach the recommended 25 to 30 g per day on a regular basis.
Our take on fiber-maxxing
Unlike many food trends that fade as quickly as they appear, fiber-maxxing has something interesting going for it: it is scientifically grounded. Eating more fiber simply means aligning with the nutritional guidelines that dietitians have been advocating for years.
So if this trend motivates you to add a handful of lentils to your plate or some chia seeds to your breakfast… go for it! Your gut microbiome will thank you.
