Why fibre matters

• People who eat more fibre (25–30 g/day or more) have lower risks of heart disease, stroke, type 2 diabetes and bowel cancer, and tend to have lower body weight, blood pressure and LDL (“bad”) cholesterol. These findings come from large reviews pooling dozens of trials and long‑term studies.
• Fibre feeds your gut microbes, which make short‑chain fatty acids (SCFAs) that support the gut lining and help calm inflammation—one reason higher‑fibre eating links to better metabolic and immune health.

Rank	Food	Category	Typical Portion Size	Fibre (g per portion)	Simple Notes & Tips
1	Chickpeas (tinned, drained)	Legume	120 g (½ a tin)	8	Add to salads, stews, or blend into hummus.
2	Red Lentils (cooked)	Legume	120 g (3 heaped tbsp)	7.5	Perfect for soups, dhal, or bolognese.
3	Black Beans (tinned, drained)	Legume	120 g (½ a tin)	7	Firm texture. Great in chilli, burritos, or with eggs. Rinse before use.
4	Chia Seeds	Nuts/Seeds	20 g (2 level tbsp)	7	Soak to make pudding or add to yoghurt/porridge. Absorbs liquid.
5	Avocado	Fruit	½ medium (≈80 g)	6.5	Mash/spread on toast or add to salads. Rich in monounsaturated fat
6	Raspberries	Fruit	80 g (a large handful)	6.5	One of the best fruit sources. Frozen are just as good and often cheaper.
7	Green Lentils (tinned, drained)	Legume	120 g (½ a tin)	6	Hold shape well. Ideal for cold salads or as a ready-to-eat side.
8	Pear (with skin)	Fruit	1 medium (≈180 g)	5.5	Eat the skin – that’s where much of the fibre is. A perfect portable snack. Organic or home grown best
9	Broccoli	Vegetable	80 g (2 spears)	4.5	Steam or roast. Chop into pasta, stir-fries, or eat as a simple side.
10	Rolled Oats (dry)	Wholegrain	50 g (porridge serving)	4.5	Choose plain jumbo/rolled oats. High in soluble fibre. Organic best
11	Wholemeal Pasta (dry)	Wholegrain	75 g (standard serving)	4.5	Easy 1:1 swap for white pasta. More filling and nuttier in flavour.
12	Apple (with skin)	Fruit	1 medium (≈180 g)	4	Another ‘eat the skin’ fruit. Pair with nuts for a balanced snack. Organic or home grown best
13	Sweet Potato (with skin)	Vegetable	150 g (1 medium)	4	Roast or bake. The skin is edible and fibre-rich.
14	Almonds	Nuts/Seeds	30 g (small handful, ~20 nuts)	3.5	High in healthy fats and vitamin E.
15	Brussels Sprouts	Vegetable	80 g (about 4 sprouts)	2.5	Roast or pan-fry with oil
16	Carrots (raw)	Vegetable	80 g (1 medium or batons)	2.5	Great for crunch with hummus. Cooking softens fibre but retains benefits.
17	Dark Chocolate (70%+ cocoa)	Other	30 g (2 small squares)	2.5	Choose high cocoa for less sugar, more polyphenols. Enjoy mindfully.
18	Quinoa (cooked)	Wholegrain	120 g (3 heaped tbsp)	2.5	A complete protein. Use as a salad base or rice alternative.
19	Banana	Fruit	1 medium (≈100 g)	2	Portable and filling. The greener (unripe) the better
20	Flaxseeds/Linseeds (ground)	Nuts/Seeds	10 g (1 heaped tbsp)	2	Must be ground to access nutrients. Stir into yoghurt, porridge, smoothies.
21	Pearl Barley (cooked)	Wholegrain	120 g (3 heaped tbsp)	2	Chewy texture. Adds bulk and fibre to soups and stews.
22	Popcorn (air-popped, plain)	Wholegrain	20 g (makes a large bowl)	2	A great wholegrain snack and easy to make at home. Check the ingredients if buying ready-made
23	Wholemeal Bread	Wholegrain	1 medium slice (≈40 g)	2	Check label – aim ≥3 g fibre per 100 g. A good staple swap. Home-made best - watch out for emulsifiers if store-bought
24	Brown Rice (cooked)	Wholegrain	120 g (3 heaped tbsp)	1.5	More fibre and nutrients than white rice. Simple staple upgrade.
25	Oranges	Fruit	1 medium (≈160 g)	1.5	Contains soluble fibre. Eat the fruit whole, not juiced.

How much to aim for

• In the UK, adults are advised to aim for at least 30 g of fibre a day (no upper limit). Most of us fall short, so any increase helps.

A simple 5‑step plan

1. Turn the dial slowly
   Increase fibre gradually over 1–2 weeks (e.g., +3–5 g/day) and drink water regularly. This helps your gut adjust and reduces bloating as your microbes adapt. Trials show more fibre improves laxation (softer, more regular stools), but going too fast can feel uncomfortable.
2. Put fibre on every plate
   Build meals from whole grains, beans/lentils, fruit/veg (skins on when edible), nuts & seeds. These patterns are consistently linked to better heart and diabetes outcomes.
3. Mix your fibre types
   • Viscous fibres (e.g., oat β‑glucan) help lower LDL cholesterol.
   • Insoluble/wholegrain fibres add bulk and speed transit.
   • Resistant starch (e.g., in cooled cooked potatoes, rice or pasta, or greenish bananas) feeds microbes that make SCFAs—useful for gut and metabolic health.
4. Lean on legumes
   A few bean or lentil meals each week can improve blood sugars and cardiometabolic markers; in diabetes, legumes can help lower HbA1c and blood pressure.
5. Make smart snacks
   Fruit (berries, pears, apples), nuts/seeds (almonds, chia, ground flax), and air‑popped popcorn keep you full and add easy grams of fibre.

Quick swaps to increase dietary fibre intake

Instead of…	Try this…	Why it helps
White toast or low‑fibre bread	Wholemeal/wholegrain bread	Higher fibre + whole‑grain benefits for heart and metabolic health.
Sugary cereal	Porridge/rolled oats or plain wheat biscuits	Oats add β‑glucan (LDL‑lowering).
White pasta/rice	Wholewheat pasta / brown rice / quinoa / pearl barley	Whole grains beat refined for cardiometabolic risk; more fibre per mouthful.
Crisps	Air‑popped popcorn (plain)	Whole‑grain snack with useful fibre.
Meat‑only chilli or Bolognese	Half meat, half lentils/beans	Legumes add fibre and support better glycaemic and lipid profiles.
Low‑fibre dessert	Berries or an apple/pear (skin on)	Fruit fibre supports gut health; whole fruit outperforms juice.
Mayonnaise‑heavy sandwich	Add avocado + salad	Avocado adds fibre and healthy fats; salad boosts total fibre.
Afternoon biscuit	Handful of almonds or yoghurt with chia/flax	Nuts/seeds add fibre and prolonged fullness. (Grind flax for best benefit.)

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A one‑day “30 g” example (mix & match)

• Breakfast: Porridge made with rolled oats, topped with berries + 1 tbsp chia.
• Lunch: Wholegrain wrap with hummus, mixed beans, crunchy veg.
• Snack: An apple (skin on) + small handful of almonds.
• Dinner: Half‑and‑half lentil Bolognese over wholewheat pasta, plus steamed broccoli.

(Portion sizes will vary, but this pattern routinely gets most adults to ~30 g.)

Troubleshooting & tips

• Bloating at first? Slow the increase, chew well, and hydrate. It usually settles in 1–2 weeks as your microbes adapt.
• IBS or sensitive gut? Start low, go slow, cook veg well, and trial different fibres (e.g., oats or kiwifruit are often gentler than big bean portions at first). If symptoms persist, speak to a clinician or dietitian.
• Label tip: Check the “fibre (g) per 100 g” and per serving—choose products with more fibre and whole grains.

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Bottom line

Build meals around whole grains, beans, fruit & veg, nuts and seeds, increase intake gradually, and drink water. This approach is strongly linked to better heart and metabolic health, and a healthier gut—benefits seen across large reviews and clinical trials.