How Much Fibre Per Day, and What About Vitamins and Minerals?

0 to Elite course · Lesson 38 of 100 · Level 2: Beginner Training & Nutrition

Protein, carbs and fat get most of the attention, but fibre, vitamins and minerals are what keep your body running smoothly. This lesson explains the UK fibre target, why most people fall short, and how to cover your micronutrients without a cupboard full of pills.

What fibre is and why it matters

Fibre is the part of plant foods that your body can’t fully digest. That sounds useless, but it does a lot:

• It keeps your digestion regular and helps prevent constipation.
• It feeds the helpful bacteria in your gut.
• It makes meals more filling, which really helps when you’re eating in a calorie deficit.
• Diets high in fibre are linked with a lower risk of heart disease, type 2 diabetes and bowel cancer, according to the NHS.

How much fibre per day in the UK?

UK guidance is that adults should aim for 30g of fibre a day. Most people in the UK eat much less than that. You don’t need to weigh it. Instead, build your meals around these foods:

• Wholegrains: oats, wholemeal bread, wholewheat pasta, brown rice.
• Beans, lentils and chickpeas: easy to add to soups, curries and salads.
• Vegetables and fruit, especially with the skin on.
• Potatoes with skins.
• Nuts and seeds, in sensible portions (you learned why in lesson 36 on fats).

Increase fibre gradually over a couple of weeks and drink more water as you do (see lesson 37 on hydration). Jumping straight from very little fibre to a lot can cause bloating and wind.

Vitamins and minerals in plain English

Micronutrients are the vitamins and minerals your body needs in small amounts. You don’t need to memorise them all. A few matter especially for people who train:

• Iron helps carry oxygen in your blood. Found in red meat, beans, lentils, dark green vegetables and fortified cereals.
• Calcium supports bones and muscle function. Found in dairy, fortified plant milks, tofu and green leafy vegetables.
• Vitamin D supports bones and muscles. It’s hard to get enough from food in a UK winter, which is why the UK government advises adults to consider a daily 10 microgram supplement in autumn and winter.
• Potassium and magnesium play roles in muscle and nerve function. Fruit, vegetables, beans, nuts and wholegrains are good sources.

What a 30g fibre day looks like

Hitting 30g is easier than it sounds once you build it into each meal. For example: porridge made with oats and topped with berries for breakfast, a wholemeal sandwich with salad and an apple at lunch, a handful of nuts in the afternoon, and a chilli with kidney beans, vegetables and brown rice for dinner. Every meal does a bit of the work, so no single food has to carry it.

Notice that this is also a good training diet. The same foods give you slow-release carbohydrate for energy and plenty of vitamins and minerals.

The simple rule: variety and colour

Different coloured fruit and vegetables bring different vitamins and minerals. The NHS recommends at least 5 portions of fruit and vegetables a day. A portion is roughly 80g, about a handful. Aim for a mix of colours across the week: greens, reds, oranges, purples. Fresh, frozen, tinned and dried all count.

If you eat a varied diet based on whole foods, you’ll cover most of your needs. Supplements fill specific gaps; they don’t fix a poor diet. Read the full guide on whether you need supplements before you buy anything.

Health note: see your GP if you have ongoing tiredness, breathlessness or pale skin (possible signs of low iron), a change in your bowel habits that lasts more than three weeks, blood in your poo, or unexplained weight loss. Don’t take high-dose vitamins or minerals without advice, and check with your GP or pharmacist if you’re pregnant or on medication.

Your action steps

1. Count your fruit and vegetable portions for three days. Write down your average.
2. Make one swap to a wholegrain: oats for breakfast, or wholemeal instead of white bread.
3. Add a portion of beans, lentils or chickpeas to two meals this week.
4. Between October and March, read up on the UK vitamin D advice and decide if it applies to you.

Frequently asked questions

How much fibre should I eat per day in the UK?

UK guidance is 30g of fibre a day for adults. Most people eat less than this, so wholegrains, beans, vegetables, fruit, nuts and seeds are the easiest way to increase it.

Do I need to take vitamins if I go to the gym?

Most people who eat a varied diet don’t need lots of supplements. The main UK exception is vitamin D, which the government advises adults to consider in autumn and winter.

What foods are high in fibre?

Oats, wholemeal bread, wholewheat pasta, brown rice, beans, lentils, chickpeas, potatoes with skins, fruit, vegetables, nuts and seeds.

Keep going

Previous: Lesson 37: How Much Water Should I Drink When I Start Training?

Next: Lesson 39: How to Build a Balanced Plate Without Counting Every Calorie

Lost your place? See the full course map.

Want Artem to coach you through it? SYP Fitness is a private 1-to-1 personal training studio at 2-4 Navigator Square, Archway, London N19 3UB. Rated 5.0 from 106 Google reviews. Book a free consultation or WhatsApp Artem on 07301 512215.