Reviews

RSP Whey Review

RSP Whey is a multi-source protein supplement by RSP Nutrition. It contains an array of both fast and slow digesting proteins and packs 25g per serving…

RSP Whey

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Whey Concentrate

Whey Concentrate is the least processed form (70-80% protein by weight) of Whey Protein which makes it the cheapest to manufacture.  This is why many brands (including RSP) use mostly Whey Concentrate in their blends.  This isn’t necessarily a bad thing; Whey Concentrate is still a fine source of protein.

Milk Protein Isolate

Milk Protein consists of Whey (about 20%) and Casein (about 80%), so it is both quickly digested and slowly digested.  RSP does not list the exact amount of Milk Protein Isolate in the blend.

Whey Hydrolysate

Whey Hydrolysate, or Hydrolyzed Whey, is Whey Protein that has been processed further than ordinary Whey Isolate and is broken down into peptides and free amino acids which reduces particle size.  In a sense, Hydrolysis is partial digestion.  The result: faster absorption.  This property makes it particularly useful post-workout, when quickly getting amino acids into the blood stream is the goal.

RSP doesn’t disclose the amount of Whey Hydrolysate, but relative to the other protein sources listed, it’s second to least.

Whey Isolate

Whey Isolate is defined as at least 90% protein by weight.  This gives Isolate an obvious advantage over less pure form of protein, but due to the further processing that is required to produce Isolate it tends to be more expensive.

Of course, there doesn’t appear to be much Whey Isolate in RSP Whey (its listed last), but that doesn’t necessarily hurt the profile of the formula.  If you want only quickly digesting protein, then obviously buying a pure Isolate supplement would be best.

The Bottom Line

As far as protein blends go, RSP Whey isn’t bad.  It contains an array of fast and slow digesting proteins and packs a total of 25g per serving.  Depending on the price, it may be worth a shot.

Still not sure which Whey Protein supplement is right for you? Check out our Best Whey Protein Supplements list!

REFERENCES

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Reitelseder, Søren, et al. “Whey and casein labeled with L-[1-13C] leucine and muscle protein synthesis: effect of resistance exercise and protein ingestion.”American Journal of Physiology-Endocrinology and Metabolism 300.1 (2011): E231-E242.
Andersen, Lars L., et al. “The effect of resistance training combined with timed ingestion of protein on muscle fiber size and muscle strength.” Metabolism 54.2 (2005): 151-156.
Stevens, Lewis. “Egg white proteins.” Comparative Biochemistry and Physiology Part B: Comparative Biochemistry 100.1 (1991): 1-9.
Carunchia Whetstine, M. E., A. E. Croissant, and M. A. Drake. “Characterization of dried whey protein concentrate and isolate flavor.” Journal of dairy science 88.11 (2005): 3826-3839.

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