Proteins

Casein protein

Also called: casein, micellar casein

A slow-digesting milk protein.

Why people take it
Muscle recovery overnight.
What the evidence says
Supports muscle like other proteins; the timing matters less than total protein.
How it is usually taken
Usually 20 to 40 g, often before bed for slow release.
Be careful
Contains milk.
Medicines it can interact with
As for whey: separate from levodopa, thyroid medicine and some antibiotics.

Other proteins

Common questions

What is Casein protein?

A slow-digesting milk protein.

Why do people take Casein protein?

Muscle recovery overnight.

Does Casein protein work?

Supports muscle like other proteins; the timing matters less than total protein.

How much Casein protein do people take?

Usually 20 to 40 g, often before bed for slow release.

Is Casein protein safe?

Contains milk.

Does Casein protein interact with medicines?

As for whey: separate from levodopa, thyroid medicine and some antibiotics.

Sources and further reading

Last reviewed 31 October 2026. Written by Satya Babu.

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For information only, not medical advice. Supplements are not medicines: they are not tested and approved like drugs before they are sold, and they can interact with medicines. Talk to your doctor or pharmacist before you start one, especially if you are pregnant or breastfeeding, take regular medicines, or have kidney, liver or heart disease.