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PKU express plus is a concentrated, powdered PKU protein substitute which when mixed with water is easily made into a drink.

PKU express™ plus+


Please note, PKU express plus is only available in the UK. If you are based in Ireland, please see the PKU express page

What is PKU express plus

PKU express plus is a concentrated, powdered PKU protein substitute which when mixed with water is easily made into a drink. The volume can be adjusted to your own preference. PKU express plus is available in two sachet sizes:

  • PKU express15 plus contains the equivalent of 15 grams of protein
  • PKU express20 plus contains the equivalent of 20 grams of protein

Both sachet sizes also contain all the vitamins and minerals that are needed to help meet your daily nutritional requirements.

Who is PKU express plus for?

PKU express plus is for children and adults with PKU. It is suitable from 3 years of age onwards and can be taken through to adulthood.  Your dietitian will advise when is best for you or your child to move on to PKU express plus. Although PKU express plus is suitable from 3 years of age it is often introduced at school starting age or later if needed.

Why do I need to use PKU express plus instead of continuing with a second stage protein substitute?

As we grow our nutritional requirements change, and this is no different for those with PKU. Vitaflo products are tailored to meet these requirements in the most efficient way. Vitaflo want to make sure the right product is available at the right time to meet your protein, vitamin and mineral requirements.

PKU express plus meets nutritional needs in older children and adults and can replace the second stage protein substitutes, such as PKU squeezie. PKU express plus is more concentrated than PKU squeezie, so taking the recommended amount is easier.

How much PKU express plus do I need?

The amount of PKU express plus needed will depend on a variety of factors including age and weight. Initially, the amount needed may only be small but it will increase as you get older to support growth. Your dietitian will advise exactly how much PKU express plus will be needed each day.

How do I make PKU express plus?

Making PKU express plus is easy!  The great thing about PKU express plus is that it can be made in a variety of ways. Below are instructions of how to make PKU express plus up in three different ways to give you an idea of how to use it. But remember it’s your product; you can make it however you want!


Express plus as a spoonable semi-solid consistency the solution to those who like a really low volume.


  1. Empty the contents of the express plus sachet and flavour pac sachet into the shaker.
  2. Add 10-20ml or 2-4 teaspoons of water.
  3. Stir well for 10 seconds and eat with a spoon.


Express plus mini drink the solution to taking it quickly.


Follow the steps above but add 80ml of water if using PKU express15 plus and 100ml of water if using  PKU express20 plus*


Express plus flexi drink the solution to making it your own.


Follow the steps to make express plus spoonable semi-solid but add as much water as you like to begin with and over time find the best volume that suits you*


*Remember water or another permitted drink should be taken straight after PKU express plus.

What flavour is PKU express plus?

PKU express plus comes in unflavoured, orange, tropical and lemon. PKU express plus unflavoured can be flavoured using your own permitted flavourings or Vitaflo’s separate flavour pac sachets which are available in blackcurrant, orange, raspberry and tropical flavours.

What if I would prefer to take a ready-to-drink product?

PKU express plus is a powdered protein substitute, which is great if you want the flexibility to make your protein substitute to your own preference. If you prefer convenience, and would like to use a liquid protein substitute click on PKU cooler and PKU air on the VitafriendsPKU product journey for more information about Vitaflo’s ready-to-drink products.

Sign up to the Vitafriends newsletter and like our Facebook page

Don’t forget to sign up to the Vitafriends newsletter to receive updates about new recipes, our low protein foods and PKU events in your area.

Join the Vitafriends PKU Facebook page to get support from others with PKU.

Other useful bits of information

Use the 'Useful Resources' section above to view our express recipe book which has lots great ideas about how to make up express using permitted drinks.

PKU express plus is a food for special medical purpose, and should be used under medical supervision.

Explorers Club

If you haven’t done so already, why not register for the Vitafriends Explorers Club – an education programme for families managing PKU in the early years.

It’s packed full of recipes to help with the introduction of solid foods!