Impact Casein is a micellar protein powder that helps overnight recovery by feeding a steady flow of amino acids. The main ingredient micellar casein digests slowly to keep your muscles fed for hours. The brand is known for quality and transparency, with strict testing and trusted certifications. That means a clean label you can feel confident about, built for nightly routines.

Available Sizes & Variants:

2.5kg casein protein powder - Ideal for overnight recovery and steady daily protein intake.

Benefits & Features:

• Slow release keeps muscles fed for hours.
• Micellar casein supports overnight recovery by delivering amino acids steadily during sleep.
• With a clean label and rigorous testing, MyProtein ensures label accuracy and quality, giving you confidence in every scoop, whether you’re training hard or simply refuelling.
• Chocolate protein powder flavour is smooth, making it easy to enjoy daily.
• Designed for simple daily use, it supports consistent protein intake without fuss.

MyProtein has built a reputation on real world results and strict quality control. This Impact Casein uses 100% micellar casein, delivering a slow release that helps protect overnight muscle protein synthesis. The brand’s facilities carry trusted certifications such as Informed Choice and NSF, with complete traceability from supplier to shelf and rigorous third party testing. Chocolate flavour is loved by many and fans often rate it as the best flavored protein powder, helping make daily routines a little more enjoyable. It’s not a pre workout powder, but can nicely supplement training days.

Micellar Casein (Milk) (100%).For allergens, see ingredients in bold.This product is intended to be used alongside a varied and balanced diet and a healthy lifestyle.

• GTIN: 5055534319826
• Manufacturer: MyProtein
• Categories: Bodybuilding SupplementsCHECKOUT UPSELLLow-Carb Protein SupplementsMyProteinNew ArrivalsNew In Supplements & VitaminsSports 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.

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

Micellar casein is a slow digesting milk protein that gives a steady stream of amino acids. This form comes from milk in a natural protein matrix and makes a gel in the stomach to slow digestion.

Its slow release action helps prolong amino acid availability, making it great for stretches without meals and overnight recovery.

Scientific research shows micellar casein helps overnight amino acid delivery, supporting muscle protein synthesis and maintenance during fasting periods. The slow digestion delivers a steady amino acid supply to promote overnight recovery and minimise protein breakdown. This mechanism keeps muscles fed during longer periods without meals, contributing to normal muscle function and recovery processes. This product is not intended to diagnose, treat, cure, or prevent any disease.

What Does Micellar Casein Do?

Scientific research suggests micellar casein helps overnight amino acid delivery, supporting muscle protein synthesis and maintenance during fasting periods. The slow digestion delivers a steady amino acid supply to promote overnight recovery and minimise protein breakdown. This mechanism keeps muscles fed during longer periods without meals, contributing to normal muscle function and recovery processes. This product is not intended to diagnose, treat, cure, or prevent any disease.

MyProtein is our go-to partner for Impact Casein because the brand shows a solid commitment to quality, openness and athlete-first purity. This maker is globally recognised for its third-party testing and clear, complete traceability from supplier to shelf, backed by trusted certifications like Informed Choice, Informed Protein and NSF Certified for Sport. These accolades reflect a long-standing industry standing and a reputation for delivering schemes that align with strict quality standards. Our evaluation highlighted MyProtein’s solid quality management and transparent labelling, which help predictable, clean ingredient sourcing for overnight recovery products.

In the UK market, the brand’s focus on purity and controlled sourcing sits well with Welzo’s expectations for reliable, accurately labelled supplements, making it a natural fit for athletes and purists seeking sustained amino acid delivery from micellar casein. This strong alignment helped our partnership decision and helps keep product integrity consistent. To confirm how we maintain these standards, check out our our expert team of doctors, nurses, and nutritionists and our really thorough testing protocols.