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Ted Munson

Performance Nutritionist

Which Protein, When?

Not all proteins are the same. Find out which protein you should be using when.

Knowing which type of protein to take and when to take it is important to ensure you maximise your training adaptations and promote recovery. Protein intake is essential to everyone, whether you’re looking to maintain or build lean muscle mass. Protein requirements [1] [2] for athletes have been recently suggested to be in the range 1.2 – 1.8 g/kg per day though this is dependent on your specific training goals. For example, when in energy balance and aiming to maintain both body mass and lean muscle mass, it is likely that protein requirements can be achieved within the lower end of the range. However, if your goal is to increase muscle mass or even maintain muscle when aiming to lose body fat, then it is suggested that protein requirements could range from 2-2.5 g/kg body mass per day. Regardless of your specific goal, you can benefit from knowing some key facts about the different types of protein that are available to consume.

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Which Protein?

The protein you choose should be high in BCAAs (leucine, isoleucine & valine). BCAAs are part of the ‘essential’ amino acids, meaning that they must be supplied by through dietary intake. These can help reduce muscle break down and ‘switch on’ muscle protein synthesis, which helps support training adaptations.

Whey Protein Concentrate - Key Product: Whey Protein

Whey protein concentrate is made by removing the fat and carbohydrate from milk. This leaves only a small amount of fat and carbohydrates in the form of lactose, with the percentage of protein varying from 30% - 80%. All whey proteins have the fastest known digestion rates, making them ideal for use post-exercise [3].

Whey Protein Isolate - Key Product: Advanced Isolate +

Whey protein isolate is a more purified version of whey protein concentrate. This does not affect the amino acid profile of the protein, but allows whey protein isolate to contain a higher percentage of protein - over 80%. This also means that there is less carbohydrate and fat.

Milk Protein - Key Product: Overnight Protein

Milk protein contains 80% casein (slow digesting) and 20% whey protein concentrate (fast digesting). This protein digests more slowly, continuously feeding the muscles with protein while you sleep. This rate of digestion is around half the digestion rate of whey protein isolate alone. It has been suggested that when combined in a milk-based formula, casein can be digested more slowly, providing a continuous stream of protein and amino acids to the muscle [4].



The protein source that you should choose depends on the time of day and the type/ intensity of exercise that may have been performed.

Throughout the day

It is currently recommended that we spread our daily protein intake evenly throughout the day using a feeding pattern of approximately 20-25g of protein every 3-4 hours [5]. Ideally, a fast digesting protein like whey protein should be taken throughout the day.

Post Workout

In the absence of consuming protein post-exercise, muscle protein balance can become negative meaning you are effectively breaking down muscle tissue. To help promote muscle recovery and ensure a positive protein balance, it is recommended you consume protein immediately post-exercise. This makes whey protein hydrolysate an ideal post-workout protein source, rapidly feeding the muscles with essential amino acids needed for muscle rebuild. Alternatively, an Advanced Isolate+ shake will provide fast digesting protein (with 5g of leucine), in addition to fluid to help promote hydration.



1. Pasiakos, S. M., Cao, J. J., Margolis, L. M., Sauter, E. R., Whigham, L. D., McClung, J. P., & Young, A. J. (2013). Effects of high-protein diets on fat-free mass and muscle protein synthesis following weight loss: a randomized controlled trial. The FASEB Journal, 27(9), 3837-3847.

2. Thomas, D. T., Erdman, K. A., & Burke, L. M. (2016). American College of Sports Medicine Joint Position Statement. Nutrition and Athletic Performance. Medicine and Science in Sports and Exercise, 48(3), 543.

3. Reidy, P. T., Walker, D. K., Dickinson, J. M., Gundermann, D. M., Drummond, M. J., Timmerman, K. L., & Jennings, K. (2013). Protein blend ingestion following resistance exercise promotes human muscle protein synthesis. The Journal of Nutrition, 143(4), 410-416.

4. Churchward-Venne, T. A., Snijders, T., Linkens, A. M., Hamer, H. M., van Kranenburg, J., & van Loon, L. J. (2015). Ingestion of casein in a milk matrix modulates dietary protein digestion and absorption kinetics but does not modulate postprandial muscle protein synthesis in older men. The Journal of Nutrition, 145(7), 1438-1445.

5. Areta, J. L., Burke, L. M., Ross, M. L., Camera, D. M., West, D. W., Broad, E. M., & Hawley, J. A. (2013). Timing and distribution of protein ingestion during prolonged recovery from resistance exercise alters myofibrillar protein synthesis. The Journal of Physiology, 591(9), 2319-2331.

6. Snijders, T., Smeets, J. S., van Vliet, S., van Kranenburg, J., Maase, K., Kies, A. K., & van Loon, L. J. (2015). Protein ingestion before sleep increases muscle mass and strength gains during prolonged resistance-type exercise training in healthy young men. The Journal of Nutrition, 145(6), 1178-1184.


  • Advance Isolate vs Ego Recovery
    Dean Kuenstler commented on October 8, 2017 at 12:09 pm

    As an "aging cycling enthusiast" I am a very big fan of SIS products; specifically the Hydration and Recovery products. With that being said, can you explain the difference between your Rego Recovery products and your new Protein Advanced Isolate? From the limited information on this website, other than the increased portion percentage of the Advanced Isolate, both of these products appear to fulfill the same function.....I am not complaining - just wondering before I try the new product. Many thanks in advance....Dean

    • #
      Science in Sport commented on October 20, 2017 at 6:53 am

      Hi Dean,
      Please email [email protected] and they will be able to assist you with your enquiry.
      Kind regards,
      Science in Sport

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