Weider Day Night Casein delivers slow releasing calcium caseinate protein to support muscle maintenance and recovery during sleep, helping you protect gains and stay on track with training. Backed by Weider's decades of experience in sports nutrition, the product is produced under strict European manufacturing standards. Quality you can trust. Night after night. Trusted by athletes.

Available Sizes & Variants:

1800 grams casein protein powder - designed for nightly recovery and sustained amino acid release.

Benefits & Features:

• Slow release keeps you satisfied longer.
• Sustained amino acid delivery supports overnight muscle maintenance and reduces muscle breakdown during long fasting.
• Enduring overnight amino acid availability helps protect muscle during extended fasting, making this ideal for anyone aiming to maintain mass while managing calories without feeling deprived.
• Mass gainer routines benefit from high protein density with low fat and carbohydrates.
• Calcium caseinate is the star ingredient driving slow digestion.

With decades in sports nutrition, Weider brings trusted quality to this casein blend. The star ingredient is calcium caseinate, derived from high quality micellar casein, accounting for about 85-95% of the protein. The formula contains no artificial preservatives or colourings, keeping it clean and straightforward. This approach supports a steady amino acid supply that helps with recovery during sleep and long fasting periods.

Energy/calories, Fat, of which Saturated, Carbohydrates, of which Sugar, Protein, Salt

• GTIN: 4044782312711
• Manufacturer: Weider
• Size: Vanilla Cream
• Categories: Best SellersProtein Powders, Shakes & SupplementsSubscribe & Save ProductsWeider Sports Nutrition Supplements
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

Stir 25 g of Day & Night Casein powder (1 measure scoop) in 300 ml of semi-skimmed milk (1.5% fat) or water. It is ideally taken before bed as a final meal or as a nutritious snack between meals. Store in a cool, dry place, away from direct sunlight and moisture. Keep in its original container with the lid tightly closed and out of reach of children. Do not exceed the recommended daily dose. If you are pregnant, breastfeeding, taking any prescribed medication, or have any medical condition, consult a healthcare professional before taking this supplement.

Please consult the product packaging for accurate instructions on how to use the product.

*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

The Primary Ingredient Is: Calcium Caseinate

Calcium caseinate is a long-digesting protein sourced from milk, creating a gel in the gut to steadily unleash amino acids across many hours. This variant comes from premium micellar casein and is often used to help sustain muscle upkeep during long fasts, like overnight.

It offers a top-notch protein source with extended amino acid supply, which helps keep protein equilibrium when times between meals stretch out.

What Does Calcium Caseinate Do?

Calcium caseinate plays a role in maintaining muscle protein balance by providing a sustained release of amino acids, supporting overnight protein availability and recovery. Its slow absorption is associated with greater satiety, which can support hunger control during calorie-conscious patterns.

This product isn't meant to diagnose, treat, cure, or prevent any illness.

Weider is a widely known sports nutrition label with many years under its belt, famed for product innovation, steady quality and broad market footprint. Weider Germany GmbH distributes products under strict European manufacturing standards and runs with rigorous quality control and transparent product labeling. This brand consistently prioritises purity and power, using top-tier micellar casein to help reliable protein delivery.

This brand’s credibility is reinforced by a long-standing reputation in the industry and a clear commitment to quality manufacturing practices. Our team seeks partners who meet and exceed industry norms, which is why this brand aligns with the certifications we require. For our customers, that means confidence in sourcing and safety as part of our wellness promise. This is reflected in how we evaluate suppliers and ensure compliance with our quality standards, discussed in detail by our team and through the certifications we require.

For Day & Night Casein, the slow-digesting calcium caseinate profile is particularly well matched to overnight protein needs, providing steady amino acid release. Welzo’s vetting process, supported by our expert team of doctors, nurses, and nutritionists and aligned with the certifications we require, ensures this brand is well suited for the British market.