Casein Protein

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Reviewed by Louisa Giampaolo, Dietitian, on 9 June 2026

Casein Protein Powder

Shop casein protein at Elite Supps. Casein is the slow-release counterpart to whey - it digests gradually, feeding your muscles a steady stream of amino acids over several hours. That makes it the go-to protein before bed, supporting overnight recovery and keeping you fuller for longer. Every member of our team is a certified nutritionist, so you can choose with confidence.

Why Casein, and When?

Where whey is fast-absorbing, casein forms a gel in the stomach and releases slowly - so as a slow-digesting protein it provides a steady supply of amino acids, in contrast to fast-digesting whey (3). That makes it ideal overnight or during long gaps between meals, and research has looked at pre-sleep casein for overnight recovery (1, 2). It is naturally rich in amino acids and BCAAs, and its slow digestion helps protect muscle during fasting periods like intermittent fasting.

How to Take It

A serve before bed is the classic use - mix it with water or milk, or with less liquid for a thick, custard-like dessert that curbs late-night cravings. It also works between meals when you want lasting fullness. Many people use whey around training and casein at night.

Why Buy from Elite Supps

  • Every member of our team, online and in all our stores, is a certified nutritionist, so expert advice is always free.
  • A specialist range of casein protein from trusted brands.
  • More than 140 stores nationwide, plus fast online delivery and same-day dispatch.
  • Family-owned, with competitive prices and regular deals.
  • Flat-rate shipping Australia-wide, and free delivery on orders over $150.
  • A 30-day money-back guarantee on your order.

Explore More

Compare whey protein, browse protein for women, or see our top 10 protein powders. Our certified nutritionists can help. References for the research cited above are listed below.

FAQ

What is casein protein?

A slow-digesting milk protein that releases amino acids gradually over several hours - the opposite of fast-absorbing whey.

Should I take casein before bed?

Yes - that is its classic use. Its slow release supports overnight muscle recovery and keeps you fuller through the night (1).

Casein or whey?

Whey is fast-absorbing and great around training; casein is slow-release and best overnight or between meals. Many people use both.

Can casein help with fasting?

Its slow digestion helps protect muscle during long gaps without food, which is why some people use it around intermittent fasting.

Where can I buy casein in Australia?

Right here at Elite Supplements. Our certified nutritionists can help. Shop online or visit any of our 140+ stores.

References

1. Dela Cruz, J., & Kahan, D. (2021). Pre-Sleep Casein Supplementation, Metabolism, and Appetite: A Systematic Review. Nutrients, 13(6), 1872. https://doi.org/10.3390/nu13061872

2. Res, P. T., et al (2012). Protein Ingestion before Sleep Improves Postexercise Overnight Recovery. Medicine & Science in Sports & Exercise, 44(8), 1560-1569. https://doi.org/10.1249/MSS.0b013e31824cc363

3. Tang, J. E., et al (2009). Ingestion of whey hydrolysate, casein, or soy protein isolate: effects on mixed muscle protein synthesis at rest and following resistance exercise in young men. Journal of Applied Physiology, 107(3), 987-992. https://doi.org/10.1152/japplphysiol.00076.2009