How much fibre do I need per day?

Adults need at least 30 g of dietary fibre per day according to UK dietary guidelines. Most people consume only around 18 g daily. You don't need to count every gram — aiming for 5 portions of fruit and vegetables daily, plus 2 portions of wholegrains and one serving of legumes, typically gets you close to the 30 g target.

What is the difference between soluble and insoluble fibre?

Soluble fibre dissolves in water to form a gel, slowing digestion and helping lower LDL cholesterol and support balanced energy levels. Good sources include oats, barley, legumes, apples, and citrus. Insoluble fibre does not dissolve — it adds bulk to stool and supports bowel regularity. Found in wheat bran, wholegrains, vegetables, and seeds. Both types are important.

Can eating too much fibre cause problems?

Suddenly increasing fibre can cause bloating, gas, and discomfort — particularly from high-FODMAP sources like onions, garlic, and legumes. Increase fibre gradually (one extra high-fibre food per week) and drink plenty of water, as fibre needs fluid to move efficiently through the gut. People with IBS may need personalised guidance on which fibre types to prioritise.

Does a high-fibre diet help with weight loss?

Yes. Dietary fibre supports weight management by slowing gastric emptying (you feel full longer), reducing meal energy density, and feeding gut bacteria that produce appetite-regulating short-chain fatty acids. High-fibre diets are consistently associated with lower body weight in research, and increasing fibre alone reduces calorie intake naturally in controlled trials.

Which vegetables are highest in fibre?

The highest-fibre vegetables include peas (8 g per 100 g cooked), artichokes (5 g), parsnips (4 g), broccoli (3 g), carrots (2.8 g), and spinach (2.5 g). Legumes — lentils, chickpeas, beans — are technically the highest fibre plant foods, with 6–9 g per 100 g cooked. Adding one serving of legumes daily is one of the most impactful single changes for fibre intake.

Is a High Fiber Diet Healthy? Complete Guide

This article is for general informational purposes only.

Dietary fibre is one of the most consistently health-supportive components of the diet across the research literature. From an informational perspective, adequate fibre intake is among the highest-impact dietary changes most people can make. This guide explains what fibre is, what the different types do, and how to increase yours without digestive discomfort. Additionally, exploring a gluten and wheat free diet plan is a great way to accelerate your results.

Soluble vs Insoluble Fibre: What's the Difference?

Soluble Fibre

Dissolves in water to form a viscous gel. Slows digestion, lowers LDL cholesterol, stabilises blood glucose. You might also find it highly effective to integrate a best sleep recovery supplement into your overall routine.

Sources: Oats, barley, lentils, chickpeas, apples, citrus, psyllium husk

Insoluble Fibre

Doesn't dissolve. Adds bulk to stool, speeds intestinal transit, supports bowel regularity.

Sources: Wheat bran, wholegrains, vegetable skins, nuts, seeds, celery

Fibre Content of Common Foods (per 100 g)

Key Health Benefits of a High-Fibre Diet

Benefit	Mechanism	Best Source
Lower LDL cholesterol	Soluble fibre binds bile acids	Oats, barley, legumes
Better blood glucose control	Slows glucose absorption	Legumes, vegetables
Bowel regularity	Adds bulk, speeds transit	Wheat bran, wholegrains
Weight management	Increases satiety	All high-fibre foods
Reduced colorectal cancer risk	Dilutes carcinogens, supports microbiome	Wholegrains, vegetables

Sample High-Fibre Day (~37 g fibre)

Meal	Food	Fibre
Breakfast	Porridge (50 g oats) + 1 tbsp chia seeds + raspberries	~10 g
Snack	Apple + 15 g almonds	~4 g
Lunch	Lentil soup (200 g) + 2 slices wholegrain rye bread	~12 g
Snack	Carrot sticks + hummus (3 tbsp)	~5 g
Dinner	Baked salmon, broccoli (150 g), quinoa (100 g cooked)	~6 g
Total		~37 g

High Fiber Diet