Optimum Nutrition 100% Gold Standard Casein

Frequently asked questions

How is casein different from whey?

Casein digests slowly. It gives off amino acids over several hours. Whey is taken in fast. That is why casein is often taken before bed or between meals. Whey is taken around workouts.

What protein source does it use?

It uses micellar casein. That is the slow-digesting form. The protein per serving changes by flavour and pack. Check the tub label.

Where can I buy it in the UK?

It is sold direct from Optimum Nutrition. It is also at Holland & Barrett and Amazon UK. Pack size can differ by shop. Check the live listing before you buy.

Is it certified for banned substances?

Yes. It carries Informed Choice. LGC's anti-doping lab tests each batch against the WADA banned list. You can search for it on the Informed Choice database.

Can I use casein before bed or between meals?

Yes. Its slow release makes it a good choice before sleep or between meals. It is not a full meal on its own. But it can help spread your protein across the day.

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