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Intra-Exercise Endurance Formula

35 reviews

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  • Product Information

    What is PRO:LONG?

    PRO:LONG is Myprotein’s premium intra-exercise endurance formula which combines carbohydrates, protein and electrolytes. This unique formula incorporates an impressive carbohydrate blend of maltodextrin, dextrose and CarBarley™, as well as added Branch Chain Amino Acids (BCAA’s), Vitamin C and Electrolytes (Sodium Chloride, Potassium Sulphate, Calcium Di Phosphate, Magnesium Oxide). Each serving also provides Casein Hydrolysate (PeptoPro®).

    Benefits of PRO:LONG

    Vitamin C contributes to the normal function of the immune system, to the reduction of tiredness and fatigue, normal energy-yielding metabolism, and to the normal function of the immune system during and after intense physical exercise.

    Who is PRO:LONG Suitable for?

    PRO:LONG is suitable for anyone wanting to add a high intake of carbohydrates into their diet. It is recommended to consume PRO:LONG 45-60 minutes prior to physical activity or during long duration exercise.

    'We are changing the name of this product to Energy ProLong. Please note that the ingredients and nutritionals are the same and only the name of the product has changed.

    Please note that the labelling on this product is provided in English as a minimum. French, Italian, German, Spanish, Danish, Swedish and Finnish may also be present on a product by product basis.

    Key Benefits
    • Unique electrolyte blend
    • Added Vitamin C
    • Low in fat
  • Suggested Use

    This shake has been designed specifically to enhance hydration† and improve performance during prolonged endurance exercise†. To reap the benefits of this product add 1 1/4 large scoops (50g) to 300-500ml of water in a Myprotein shaker to consume during your workout. †Carbohydrate-electrolyte solutions contribute to the maintenance of endurance performance during prolonged endurance exercise and enhance the absorption of water during physical exercise.

    Store in a cool, dry place away from direct sunlight. This product is intended to be used alongside an active lifestyle and a balanced diet. Not suitable for vegetarians.

  • Ingredients

    For allergens, including cereals containing gluten, see ingredients in bold. May also contain egg.

    Tropical Flavour: Pro:Long*TM* Carbohydrate Blend (70%) (Maltodextrin, Dextrose, Waxy Barley Starch (CarBarley*®*)), Branched Chain Amino Acid Powder (Leucine, Isoleucine, Valine, Soy Lecithin), Casein Hydroylsate (PeptoPro*®*) (Milk) (4%), Vitamin C (Ascorbic Acid), Electrolytes (Sodium Chloride, Potassium Sulphate, Calcium Di Phosphate, Magnesium Oxide), Flavouring, Acid (Citric Acid), Colour (Curcumin), Sweetener (Sucralose)

  • Nutritional Information

    Serving Size - 1 ¼ large scoops (50g)

    Servings Per Container - 30 (1.5kg)

    Nutritional Information

      Per 100g Per Serving *RI
    Energy 1407 kJ/332 kcal 704 kJ/166 kcal 8%
    Fat 0.5 g 0.3 g 0%
      of which saturates 0.1 g 0.1 g 1%
    Carbohydrates 75 g 37 g 14%
      of which sugars 22 g 11 g 12%
    Protein 5.8 g 2.9 g 6%
    Salt 0.75 g 0.38 g 6%
    Vitamin C   500 mg 625%
    Chloride   200 mg 25%
          Per Serving
    L-Leucine     2.5 g
    L-Isoleucine     1.25 g
    L-Valine     1.25 g


    * Reference intake of an average adult (8400 kJ/2000 kcal)

    The nutritional information is based on the Tropical Flavour version, when choosing an alternative flavour the nutritional values may vary.

Customer Reviews


35 reviews

5 20
4 8
3 4
2 2
1 1
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Top Customer Reviews

Where reviews refer to foods or cosmetic products, results may vary from person to person. Customer reviews are independent and do not represent the views of The Hut Group.

Great product

I use this for kickboxing training - usually 60-90 mins of intense interval style work. Before i started taking this i used to get quite lethargic half way through the session, now I have no issues at all. Doesn't mix well so you need to shake regularly, but that's no issue at all. Tastes great, as long as you put enough water in....can be a bit like 'neat cordial' if you dont. Overall highly recommended.
Goes Well With:


Does what it says I run long hours and prolong helps keep me fuelled,hydrated and ready for my next run
Goes Well With:

Great recovery

Gives me everything thing I need after a workout. Much needed after starting a 12 week training plan
Goes Well With:

Great for cycling

I bought it as a friend said it was good. I agree it helps me as I get better at cycling. I've only been cycling for 12 weeks after 20 years as a couch potato. And find this product really helps me keep going.

Intra workout

Hi love this product as an intra workout drink. Sipping as i workout. but i do tend to keep topping up with more water. As i find this works well for me as it keeps me energised and hydrated. I find i can workout longer and better with pro long. For me the taste is fine. Yes you do have to keep shaking the mix as some settles on the bottom. But also this fine as i sip in between sets. I Must say for shorter workouts i do use less than suggested. Try a few ways and find what works for you.
Goes Well With:


Loving this as an intra workout drink. Recommended to a friend and had to buy him a pouch.

Big thumbs up!

I'm on here ordering this for the 2nd time. I sweat like a racehorse when I'm training, so I always take a decent drink into the gym with me otherwise I dehydrate & get headaches. I used to use lucozade/Gatorade type stuff but this tops them all. It helps me keep going when training gets tough & I've really got to dig in to finish the sets.
Goes Well With:
500 - 750ml of water

I love it

Its an amazing product and it keeps me going always whenever my team mates are getting tired.
Goes Well With:
Daily exercises

Prolong for distance cycles

I've used this on a few long distance road bike rides. Mixes very well but does tend to settle at the bottom of the bottle after a while. However a quick shake sorts it out, tastes good and goes down very easy. A great product
Goes Well With:

Not Vegan

This product contains milk. You have it marked up as vegan.

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