Protein supplement users must have heard a lot of the word 'whey', 'soy' and 'casein'. But did they know where they come or extracted from? Here's a little bit about the three most reputable protein types:
Whey
- Found in very small amounts in milk (~20%)
- A by-product of cheese and curd manufacturing
- Contain all the essential amino acids, rich in vitamin and minrerals and has the highest BCAA content
- A fast protein- quick to enter the body and be absorbed and used for protein synthesis.
Casein
- The predominant protein in milk (~80%)
- Responsible for making curds
- A slow protein, thus causing slow release of amino acids over 3-4 hour
- Although not known to have large impact for protein synthesis, it is known to suppress protein breakdown.
Soy
- Found in soybeans (obviously).
- Does not contain as high level of BCAA as whey and casein but still contain all the essential amino acids.
- Preferred by the vegetarians.
- Considered to have intermediate effect where the concentrations in blood peak somewhat later compared to whey, but its digestion rate is much quicker than casein.
So, which one is best? The fast, the slow or the middle?
A new study from the University of Texas Medical Branch finds that the combo of the three —whey, casein and soy—right after your workout may help you get bigger than just a single type of protein alone. In the study, they used a protein blend of 25% isolated soy protein, 25% isolated whey protein and 50% casein.
Why the combo?
Because our muscle do not recover in 30 minutes. Instead, it takes up to 24-48 hours to recover after a resistance workout. As each type is absorbed at different rate during digestion, the delivery of amino acids to the muscle is extended. In other words,
"The longer you can supply the muscle with amino acids, the better it is for growth and recovery" -Mark Cope, nutrition research scientist at Solae Global
Therefore, your muscle gets to 'eat' the nutrients it needs, giving it the opportunity to 'grow' and 'get big'.
How can you get the combo without having to eat 3 different snacks?
You can always look for ready-made protein smoothies, bars and products that have a combination of whey and soy protein (read the labels).

On a tight budget?
If so, make DIY post-workout protein snack by mixing milk (that's where you'll find casein), soy and whey powders. Or simply consume chocolate milk. Research also support the performance benefits of chocolate milk as post-workout snack too!












