Skip to content

Optimum Nutrition Gold Standard 100% Casein 1.82kg

See More by: Optimum Nutrition
Stock Expiry Date: 30-11-2025
3+ in stock, ready to be shipped
3+ in stock, ready to be shipped
3+ in stock, ready to be shipped

Get it between - with

Order within for fastest dispatch
Original price £78.99 - Original price £78.99
Original price
£78.99 - £78.99
Current price £78.99

Price per Serving: £2.63 GBP

  • A slow-digesting protein shake provides a prolonged source of protein for the growth and maintenance of muscle mass*
  • 24 g of premium micellar casein protein per serving for an impactful supply of amino acids overnight
  • Contains 680 mg of calcium which contributes to the normal muscle function*, in addition to 0.5 Percent fat and no added sugars
  • A protein resource for athletes that play a range of competitive sports
  • Ideal as an anytime snack, before bed and in between regular meals
  • *Source: Official Journal of the European Union - COMMISSION REGULATION (EU) No 432/2012
  • Description
  • Ingredients
  • Optimum Nutrition Gold Standard Casein Slow Digesting Protein Powder with Zinc, Magnesium and Naturally Occurring Glutamine and Amino Acids, 55 Servings, 1.82 kg, Packaging May Vary

    Elite sportsmen and women around the world turn to Optimum Nutrition Gold Standard 100 Percent Casein to put their muscles in the ideal possible shape for high-level competition. This slow-digesting shake provides an ideal boost of protein to the regular diet and facilitates the growth and maintenance of muscle mass*. In addition to 680 mg of calcium per serving that supports the normal muscle function*, 0.5 Percent fat and no added sugars, it provides 24 g of premium micellar casein to ensure peak conditioning before and after high-intensity workouts. Optimum Nutrition Gold Standard 100 Percent Casein can be taken as a snack at any point throughout the day right up until bedtime.*Source: Official Journal of the European Union - COMMISSION REGULATION (EU) No 432/2012


    Casein proteins are pH sensitive and gel in the acidic environment of the stomach. As a result, it can take more than twice as long for caseins to be broken down into their amino acid subcomponents than whey and other protein sources. Because of their unique time-released traits, caseins are aptly described as anti-catabolic or muscle-protecting proteins. Casein protein is ideal for use in between meals and before bed. Casein protein is sometimes known as "night time protein" because it's ideal to have just before you go to bed.


    Add one heaped scoop of Gold Standard 100% Casein with 300 to 350 ml (10 to 12oz) of water or preferred beverage. Use ON 100% Casein Protein first thing in the morning, immediately before bed, in place of small meals and/or any other time when delayed protein absorption is desired. To encourage a positive nitrogen balance, consume approximately one gram of protein per pound of body weight per day from a combination of high protein foods and supplements. For even better results, consume your daily protein allotment over several small meals spread evenly throughout the day.

    Safety Warning

    Always reseal after use, keep in cool dry place.

    Legal Disclaimer

    Food supplements should not be used as a substitute for a varied diet. Do not exceed the stated recommended daily dose. Keep out of reach of young children. Storage: always reseal after use, keep in a cool dry place.

    Box Contains

    • 1.8kg protein powder
    • 1 x serving scoop
  • Micellar CASEIN (88%) [MILK] (Emulsifier: Sunflower Lecithin), Fat-Reduced Cocoa Powder, Flavourings, Sodium Chloride, Stabiliser (Sodium Carboxy Methyl Cellulose), Magnesium Oxide, Sweeteners (Sucralose, Acesulfame K), Zinc Oxide.

    1816g / Chocolate 5060469989846
    1816g / Strawberry 5060751990741
    1816g / Vanilla 5060469989853

Calories 120kcal kcal
Protein 24g g
Fat 1g g
Carbs 4g g
Values per serving
Please note that this information may be subject to change.
For the most accurate and up-to-date details, please refer to the product packaging.
Shipping & Returns

Fast and Reliable Shipping
Our shipping partners include Royal Mail, ProCarrier, DPD, and DHL to ensure global delivery coverage.

Dispatch Times
Due to high demand, some items may not be immediately available as we order upon your purchase to guarantee product freshness. Please allow 1-2 working days for processing. Orders must be placed by 2 PM GMT to be processed the next working day.

Domestic Shipping (UK)
Royal Mail & DPD options available at checkout.
For an delivery estimate before purchase, use our Delivery Time Estimator

  • Free Shipping: Available for all orders over £60.
  • Standard Shipping (Up to 20kg): Delivered within 2-4 business days.
  • Express Shipping (Up to 20kg): Delivered within 1-3 business days.
  • Express Shipping (Over 20kg): Delivered within 1-2 business days.

International Shipping
Shipping costs are based on weight and will be calculated at checkout. For a delivery estimate before purchase, use our Delivery Time Estimator

Customs and Duties

  • Non-EU Customers: Please note that orders may be subject to import duties, taxes, and other charges which are not included in the total cost of your order. These charges are your responsibility.
  • EU Customers: We are IOSS registered as of July 1, 2021. VAT is paid at the time of purchase, though custom duties / import fees may still apply.

If you're experiencing issues with your order, please contact us at For detailed information on our shipping and return policies, please visit our Shipping & Returns Policies page.

Need Help? Contact Us!

If you require any assistance, we'd be happy to help!

We're available Monday to Friday 9am-4pm UTC

Website Disclaimer

Product information on our website is subject to change by manufacturers.
Actual product packaging, materials, and ingredient lists may differ from
what's shown. Information is for informational purposes only. Don't rely solely
on our website's information; always read labels, warnings, and directions
before using or consuming a product. For up-to-date information, contact the
manufacturer Optimum Nutrition. Any medical claims or
clinically proven studies mentioned are provided by the manufacturer and not
endorsed or verified by us. For safety concerns or other information, consult
the label or packaging and contact the manufacturer. Content isn't intended as
a substitute for professional medical advice. Contact a health-care provider if
you suspect a medical issue. We aren't responsible for inaccuracies or
misstatements about products by manufacturers or third parties, but this
doesn't affect your statutory rights.

Customer Reviews Disclaimer

The customer reviews featured on our website are sourced from third-party
platforms and individual contributors. We showcase these reviews to provide our
customers with a broad range of opinions and experiences from other users,
which may help in making an informed decision about a product. However, we do
not verify the authenticity of reviews nor do we endorse any statements made in
these reviews.

We are not responsible for any discrepancies or inaccuracies found within
these reviews, nor for any actions taken by you based on the content of such
reviews. While we aim to present only genuine reviews, we cannot guarantee the
reliability or accuracy of the content provided by third parties. We advise
customers to use their discretion when evaluating product reviews.

Our inclusion of third-party reviews should not be seen as an appropriation
of such content but as a means of providing a comprehensive view of public
opinion. If there are any concerns regarding the legitimacy or ownership of the
reviews, please contact us for clarification or action.

Optimum Nutrition Gold Standard 100% Casein 1.82kg