Code TRYIMMUFIX: 20% off your first order · Free UK delivery
4.8 out of 5 from 89 reviews
Paula Radcliffe, 24 to 52

Same drink at 52 as at 24.

Twenty-eight years, a world record, four Olympics and life after racing. Paula skipped the protein powders, pill packs and green shakes. One thing stayed: Immufix.

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£41.60first month with TRYIMMUFIXThen £52 a month, 3-month minimum. Or £52 one-time with the code, usually £65.

  • Since 1998
  • Made in Cambridgeshire
  • 30-day money-back guarantee

Vitamin C, vitamin D, zinc and selenium contribute to the normal function of the immune system.

Vitamin D contributes to the maintenance of normal bones and normal muscle function.

Paula Radcliffe holding a pouch of Immufix Vanilla
Paula RadcliffeMarathon world record holder, 2003 to 2019
4.8out of 5 from 89 reviews
87 of 89reviews give it 4 or 5 stars
1998the year Paula started taking it
Cambridgeshiremade in the company's own facility
28 years, one routine

Paula's life, by age.

  1. 24

    1998

    Introduced to Brian Welsby's formula, then called Breakthrough. Starts taking it every day.

  2. 29

    2003

    London Marathon, 2:15:25. A world record that stands for sixteen years.

  3. 31

    2005

    World champion in the marathon.

  4. 34

    2008

    Beijing, her fourth Olympic Games.

  5. 52

    Today

    Co-owner of the company that makes it. Same drink, every day.

Paula Radcliffe today
52, not 30

It's harder than it was at 30.

“A late night hits harder, and a bad week takes a lot longer to shake off.”Paula Radcliffe, in her video

  • Less margin

    At 30 you can get away with a lot. At 50, routine matters more.

  • Too many products

    Protein powders, vitamin pills, green shakes. Most of it ends up at the back of a cupboard.

  • One habit that lasts

    The routine that works is the one you're still doing in ten years.

At 50, not 30

The basics matter more.

The government's diet survey shows how far most adults are from the basics, at every age.

17%of adults met the 5 A Day recommendation
“Less than 1 in 5 adults (17%) met the 5 A Day recommendation.”
Office for Health Improvement and Disparities, GOV.UK, 11 June 2025
National Diet and Nutrition Survey 2019 to 2023
3.3 to 3.7portions of fruit and veg a day, on average, depending on age
“On average, adults consumed 3.3 to 3.7 portions per day (depending on age).”
Office for Health Improvement and Disparities, GOV.UK, 11 June 2025
National Diet and Nutrition Survey 2019 to 2023
4%of adults met the fibre recommendation
“For adults, 4% met the fibre recommendation.”
Office for Health Improvement and Disparities, GOV.UK, 11 June 2025
National Diet and Nutrition Survey 2019 to 2023

Food comes first. Immufix sits alongside it as one simple daily habit, the kind you can still be doing in ten years.

What's in it

What it contributes to, at any age.

Vitamins, minerals and plant nutrients in a daily drink. In the wording UK law allows:

Vitamin D

Vitamin D

Contributes to the normal function of the immune system and to the maintenance of normal bones and normal muscle function.

Magnesium

Magnesium

Contributes to normal muscle function, normal energy-yielding metabolism and the reduction of tiredness and fatigue.

Vitamin C

Vitamin C

Contributes to the normal function of the immune system and to the reduction of tiredness and fatigue.

B vitamins

B vitamins

Riboflavin, niacin and pantothenic acid contribute to normal energy-yielding metabolism and to the reduction of tiredness and fatigue.

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The formula

Also in every serving.

Vitamins, minerals and plant nutrients, with what each one contributes to in the wording UK law allows.

Zinc
Zinc

Contributes to the normal function of the immune system and to the maintenance of normal skin, hair and nails.

Selenium
Selenium

Contributes to the normal function of the immune system and to normal thyroid function.

Prebiotic FOS
Prebiotic FOS

A prebiotic fibre, declared on the label with every other ingredient.

Citrus bioflavonoids
Citrus bioflavonoids

Plant nutrients from citrus, carried alongside the vitamin C.

Every declared amount, nutrient by nutrient, is on the label in the shop below and on The Science page. See The Science page.

Paula Radcliffe
Paula Radcliffe

Paula, in her own words.

“I was lucky enough not to have to take all the random protein powders, vitamin pills and green shakes. But one thing has always stuck.”Paula Radcliffe, in her video
“Since that first introduction in 1998, Immufix has remained a constant in my life.”Paula Radcliffe
2:15:25Marathon world record, London 2003. It stood for 16 years.
3 + 3London Marathon and New York City Marathon wins
4Olympic Games for Great Britain
GoldWorld, European and Commonwealth championships

Paula is a co-owner of the company that makes Immufix. Her account is her own experience, not health advice.

How it started

Built by a biochemist, in 1998.

Immufix wasn't designed in a marketing meeting. It started as one man's answer to a question most supplement makers skip.

Brian Welsby, the biochemist who built the formula
1998

Brian Welsby's Breakthrough.

Biochemist Brian Welsby built a daily formula around Food State nutrition: minerals cultured in yeast, vitamins complexed the way they occur in food. He called it Breakthrough.

Jars of powder and brass scales
1998

Denise Lewis makes the introduction.

Denise Lewis, who went on to win Olympic gold in Sydney, introduced Paula to Brian. Paula, then 24, started taking the formula every day.

Paula Radcliffe racing the London Marathon in 2003
2003

2:15:25 in London.

Peak training weeks ran to 130 miles, and Brian also developed the drinks that fuelled her marathon preparation. The world record she set stood for sixteen years.

Paula Radcliffe holding a pouch of Immufix Vanilla
2026

The customers buy the company.

Paula and five friends, people she had introduced to the formula over the years, bought the company that makes it. Breakthrough is now Immufix, still made in Cambridgeshire.

From Paula's own account and the company's story. Read Paula's full story.

Is it for you

It's for you if:

From 24 to 52, from a world record to life after racing, Paula Radcliffe's one constant has been the same daily drink.

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  • You're 40, 50 or older and want one simple routine.
  • You've tried powders and pills that didn't last.
  • You want every amount on one label.
  • You'd prefer a drink to tablets.
Customer reviews

What customers are saying.

Long standing customer of immufix, and your service is excellent. Would recommend.

Diane Hillspot

I have been taken it every day for about 2 years. BUY

Jane

I take immufix everyday. Would recommend

Gordon Smith

Dissolves very easy. Flavour is one to my taste but it’s only a small amount a day

Kyle Jaggar · 17 August 2026 · Verified buyer

Thank you for the fantastic service I received and my immufix order came the very next day. Very good company to deal with and I highly recommend immufix. J.Laing.

James Laing

There is no other product like it. It get's my recommendation any day.

Brian Wells
After you order

What happens next.

  1. Today

    Dispatched

    Order before 2pm on a weekday and it leaves the same day by Royal Mail 48.

  2. 2 to 3 working days

    On your doorstep

    Free standard UK delivery on every order, tracked.

  3. Every day

    One drink

    Stir a 25g serving into around 200ml of cold water. Orange or vanilla.

  4. Up to 30 days

    Your guarantee

    Not for you? We refund your first pouch, less £10 shipping and handling.

  5. After 3 months

    Your call

    On subscription, pause, skip or cancel any time up to 7 days before renewal.

Paula's code

Your first order, 20% off.

Code TRYIMMUFIX is added at checkout when you order from this page. One use per customer.

Most popular

Subscribe

£41.60 first month

Then £52 a month, delivered monthly. 3-month minimum, then pause, skip or cancel up to 7 days before renewal.

Start subscription

One pouch

£52 £65

A single 750g pouch, 30 servings. No subscription.

Buy once
TRYIMMUFIX 30-day money-back guarantee on your first pouch, less £10 shipping and handling Free tracked UK delivery
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Daily Immune Support.

Choose your flavour, then subscribe or buy once. Your code is applied at checkout.

Immufix Orange with its nutrient sources
750g · 30 servings · one month

Daily Immune Support

Vitamins, minerals and plant nutrients in a daily drink. The formula Paula Radcliffe has taken every day since 1998.

4.8 out of 5 · 89 reviews
30‑day money-back guaranteeMade in the UKTracked UK delivery
Flavour
Purchase option
1
Start subscription · £52

Dispatched the same day on weekday orders placed before 2pm.

Free standard UK delivery. Royal Mail 48 tracked, 2 to 3 working days. UK addresses only.

30‑day money-back guarantee. Try your first pouch of IMMUFIX for up to 30 days. If it’s not for you, we’ll refund your first qualifying pouch, less £10 shipping and handling. First purchase only. T&Cs apply.

Checkout completes securely on immufix.com

We accept

Vitamin C, vitamin D, zinc and selenium contribute to the normal function of the immune system. B vitamins and magnesium contribute to normal energy‑yielding metabolism and to the reduction of tiredness and fatigue. Vitamin E contributes to the protection of cells from oxidative stress.

Per 25g serving: Vitamin A 200µg, Vitamin D3 1.25µg, Vitamin E 2.5mg, Vitamin C 100mg, Vitamin K 10µg, Thiamin 0.25mg, Riboflavin 0.35mg, Niacin 4.5mg, Pantothenic acid 1.5mg, Vitamin B6 0.5mg, Vitamin B12 0.25µg, Biotin 37µg, Folic acid 50µg, Iron 1.25mg, Zinc 3.75mg, Iodine 37.5µg, Copper 0.12mg, Selenium 75µg, Magnesium 70mg, Chromium 50µg. Calcium, manganese and potassium are also present at trace levels, so they are not declared on the label.

Functional nutrients: prebiotic FOS (included as part of the fibre content), L‑glutamine 1g, Taurine 500mg, L‑methionine 250mg, CLA 365mg, Soya isoflavones 45mg, Citrus bioflavonoids 28mg, Choline 1.25mg, Inositol 1.25mg, Boron 0.25mg, PABA 1.25mg.

Per serving: 75 kcal, 2.1g protein, 13.2g carbohydrate (of which sugars 9.9g), 6.9g prebiotic FOS. Allergens: contains soya. Vegetarian, and Orange is also suitable for vegans. Gluten free. No artificial colours, flavours or preservatives. See the full glossary →

One 25g scoop into around 200ml of cold water, once a day. Stir or shake and drink. Most people take it first thing in the morning so the habit sticks.

Food supplement. Do not exceed the stated recommended daily dose. Keep out of reach of young children. Food supplements should not be used as a substitute for a varied, balanced diet and a healthy lifestyle.

You save 20% on every order, forever. The subscription runs for a minimum of three months, so the minimum commitment is three payments of £52 (£156). After that you can pause, skip or cancel whenever you like from your online account, and any change needs to be made up to 7 days before your next renewal so we don’t dispatch it first. Your 14-day statutory right to cancel still applies from the day your first pouch arrives, and the first pouch carries the 30-day money-back guarantee.

Free standard UK delivery on every order. Orders before 2pm dispatch the same day via Royal Mail 48 (2 to 3 working days). Express is available at checkout for £4.65.

30‑day money-back guarantee. Try your first pouch of IMMUFIX for up to 30 days. If it’s not for you, we’ll refund your first qualifying pouch, less £10 shipping and handling. First purchase only. T&Cs apply.

Unopened orders you no longer want fall under standard returns: tell us within 14 days of delivery, send it back sealed within 14 days of telling us, and we refund it in full.

FAQ

Questions, answered.

Stir a 25g serving into around 200ml of cold water once a day and drink. Most people take it in the morning so it becomes a habit.

Speak to your GP or pharmacist before starting any food supplement if you take medication.

No. Food supplements should not be used as a substitute for a varied, balanced diet and a healthy lifestyle.

There are two natural flavours, orange and vanilla. No artificial colours, flavours or preservatives.

You save 20% on every order, £52 instead of £65, delivered monthly, with a minimum term of three months. Pause, skip or cancel after that, up to 7 days before renewal. Read the full terms

Try your first pouch of IMMUFIX for up to 30 days. If it's not for you, we'll refund your first qualifying pouch, less £10 shipping and handling. First purchase only. T&Cs apply

Free standard UK delivery on every order. Orders placed before 2pm on a weekday dispatch the same day by Royal Mail 48, which takes 2 to 3 working days.

Paula Radcliffe holding a pouch of Immufix Vanilla
Since 1998

The drink Paula has taken for 28 years.

Vitamins, minerals and plant nutrients in one daily drink, made in Cambridgeshire. £41.60 for your first month with TRYIMMUFIX.

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