{"title":"Casein Protein","description":"\u003cp\u003eCasein protein is the slow-digesting counterpart to fast-absorbing whey — where whey delivers amino acids rapidly for immediate post-workout protein synthesis, casein forms a gel in the stomach and releases amino acids gradually over 5–7 hours, making it the ideal protein for overnight recovery, sustained muscle protein availability during extended fasting periods, and reducing muscle breakdown during sleep. Bulldog Nutrition carries premium casein protein supplements from top brands, all sourced from authorized distribution. Ships fast across Canada and the United States.\u003c\/p\u003e\n\n\u003cp\u003eMicellar casein — the most common and highest-quality form of casein protein — is derived from milk and naturally digests slowly due to its micelle structure, which forms a thick, slow-releasing gel when it contacts stomach acid. This slow release makes it fundamentally different from whey in its application: where whey is best used around training, casein is most valuable in contexts where amino acid availability over hours is more important than rapid delivery — primarily pre-sleep and during extended periods between meals.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhere casein fits in your stack:\u003c\/strong\u003e Casein doesn't replace whey — they serve different roles. Whey post-workout for immediate recovery; casein before bed for overnight anti-catabolism and sustained amino acid availability. Athletes who train hard and prioritize muscle recovery benefit from using both strategically, rather than relying on a single protein source for all supplementation needs.\u003c\/p\u003e\n\n\u003cp\u003eShop casein protein supplements below — ships fast across Canada and the United States.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is casein protein and when should I take it?\u003c\/strong\u003e\u003cbr\u003eCasein protein is the slow-digesting dairy protein that makes up approximately 80% of milk protein (whey is the remaining 20%). Micellar casein forms a gel in the stomach that digests over 5–7 hours, releasing amino acids gradually. The best time to take casein is before sleep — the slow overnight amino acid release supports muscle protein synthesis during the overnight fasting period and reduces muscle breakdown. It can also be used between meals when you need long-term protein availability rather than immediate absorption.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs casein protein better than whey for overnight recovery?\u003c\/strong\u003e\u003cbr\u003eFor overnight use specifically, casein's slow digestion rate makes it significantly more effective than whey — because the goal during sleep is sustained amino acid availability over hours, not rapid absorption. Whey absorbs too quickly to maintain elevated amino acid levels through an 8-hour sleep. Casein's 5–7 hour digestion window aligns with typical sleep duration, making it the evidence-supported choice for pre-sleep protein supplementation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs casein protein available in Canada?\u003c\/strong\u003e\u003cbr\u003eYes. Casein protein supplements are available in Canada through Bulldog Nutrition — an authorized Canadian and US retailer. Multiple brands and sizes are available with fast shipping across Canada and the United States.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I mix casein protein into recipes?\u003c\/strong\u003e\u003cbr\u003eYes — casein protein's thick texture when mixed with water makes it better suited for baking and recipe use than whey protein in many applications. Casein produces denser, moister baked goods and is popular in high-protein pancake recipes, cheesecakes, and other baked protein recipes where a thicker batter or better moisture retention is desired. PEScience Select Protein (a whey-casein blend) is another popular option specifically for protein baking.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs casein protein good for weight loss?\u003c\/strong\u003e\u003cbr\u003eYes — casein protein is particularly useful during fat loss phases. Its slow digestion provides greater satiety than fast-absorbing proteins, reducing hunger for extended periods after consumption. A casein shake before bed during a caloric deficit also supports lean muscle preservation overnight — the period when muscle breakdown risk is highest due to the overnight fasting state combined with caloric restriction.\u003c\/p\u003e","products":[{"product_id":"optimum-100-casein-protein-4-lbs","title":"Optimum 100% Casein Protein, 4 lbs","description":"\u003ch2\u003eOptimum Nutrition 100% Casein Protein — 4 lbs (56 Servings)\u003c\/h2\u003e\n\u003cp\u003eOptimum Nutrition 100% Casein is the world's best-selling micellar casein — and for good reason. At 75% protein by weight, it delivers 24g of slow-digesting micellar casein per 32g serving, providing a sustained release of amino acids over 5–7 hours. This makes it the definitive nighttime protein: taken before bed, it continuously feeds muscle tissue through the overnight fast when you'd otherwise be in an amino acid deficit. Each serving also provides 40% of your daily calcium requirement — a significant nutritional bonus alongside the muscle-preservation benefits.\u003c\/p\u003e\n\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;margin:12px 0;\"\u003e\n  \u003ctr style=\"background:#222;color:#fff;\"\u003e\n    \u003cth style=\"padding:8px;text-align:left;\"\u003eSpec\u003c\/th\u003e\n    \u003cth style=\"padding:8px;text-align:left;\"\u003ePer Serving (32g)\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003eBrand\u003c\/td\u003e\n    \u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003eOptimum Nutrition\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003eSize\u003c\/td\u003e\n    \u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003e4 lbs (56 servings)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003eProtein\u003c\/td\u003e\n    \u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003e24g\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003eCalories\u003c\/td\u003e\n    \u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003e~110–120\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003eFat\u003c\/td\u003e\n    \u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003e≤1g\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003eSugar\u003c\/td\u003e\n    \u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003e1g\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003eBCAAs (naturally occurring)\u003c\/td\u003e\n    \u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003e~5g\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003eCalcium\u003c\/td\u003e\n    \u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003e40% DV\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003eProtein Type\u003c\/td\u003e\n    \u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003eMicellar Casein (slow-digesting)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003eAvailable Flavours\u003c\/td\u003e\n    \u003ctd style=\"padding:8px;border-bottom:1px solid #ddd;\"\u003eChocolate Supreme, Creamy Vanilla\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMicellar Casein — 5–7 Hour Release\u003c\/strong\u003e — Unlike whey protein which digests in 1–2 hours, micellar casein forms a gel in the stomach that releases amino acids slowly over 5–7 hours — providing anti-catabolic protection during sleep and extended fasting periods.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e24g Protein at 75% Protein by Weight\u003c\/strong\u003e — One of the highest protein densities in any slow-digesting protein formula on the market. Minimal carbs and fat means the calories are almost entirely protein.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e40% Daily Value Calcium Per Serving\u003c\/strong\u003e — Micellar casein is naturally calcium-rich. For athletes, adequate calcium supports muscle contraction, bone density under heavy loading, and overall metabolic function.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e5g Naturally Occurring BCAAs\u003c\/strong\u003e — Including leucine, isoleucine, and valine to support overnight muscle protein synthesis and reduce muscle breakdown through the fast.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e56 Servings per 4lb Container\u003c\/strong\u003e — Nearly two months of nightly use in a single tub at a cost-efficient per-serving rate.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBest For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eNighttime use before bed to prevent overnight muscle catabolism\u003c\/li\u003e\n  \u003cli\u003eBetween-meal slow-release protein to maintain a positive nitrogen balance throughout the day\u003c\/li\u003e\n  \u003cli\u003eAthletes in a calorie deficit who want maximum muscle preservation\u003c\/li\u003e\n  \u003cli\u003eStacking with whey protein for a complete fast + slow protein protocol\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNot Ideal For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003ePost-workout use where fast absorption is the priority — use whey instead\u003c\/li\u003e\n  \u003cli\u003eThose with dairy or lactose intolerance (micellar casein is a milk protein)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIngredients \u0026amp; Allergens\u003c\/h3\u003e\n\u003cp\u003ePrimary protein source: Micellar Casein. Other ingredients vary by flavour and include natural and artificial flavours, cocoa (Chocolate Supreme), cellulose gum, soy lecithin, sucralose. \u003cstrong\u003eContains: MILK, SOY.\u003c\/strong\u003e Confirm the complete ingredient list for your specific flavour on the product label before use.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWho Is This For?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOptimum Nutrition casein protein is ideal for athletes and gym-goers who want a slow-digesting protein to support overnight muscle protein synthesis and recovery. It works best as a pre-bedtime protein source or as a filling, sustained-release protein between meals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWho Is This NOT For?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNot suitable for individuals with dairy or milk allergies. Casein is a slow protein — it is not the best choice for immediate post-workout recovery where fast-absorbing whey is preferable.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy Buy From Bulldog Nutrition?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBulldog Nutrition is an authorized Canadian and US retailer of Optimum Nutrition products. We source directly from the brand — never from grey market or unauthorized distributors — so every order is genuine and fresh.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e✓ Authorized Optimum Nutrition retailer — authentic products only, never grey market or counterfeit\u003c\/li\u003e\n\u003cli\u003e✓ Ships across Canada and the US — fast, reliable delivery to your door\u003c\/li\u003e\n\u003cli\u003e✓ 10+ years in business — a track record you can rely on\u003c\/li\u003e\n\u003cli\u003e✓ 4.7\/5 stars from 2,400+ verified customer reviews\u003c\/li\u003e\n\u003cli\u003e✓ Ongoing support available — reach us anytime via email or live chat\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Optimum Nutrition","offers":[{"title":"Chocolate Supreme","offer_id":23369045701,"sku":"10653","price":118.99,"currency_code":"CAD","in_stock":true},{"title":"Creamy Vanilla","offer_id":23369045765,"sku":"10654","price":118.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1668\/9725\/files\/casein-choc-front.jpg?v=1778292224"}],"url":"https:\/\/www.bulldognutrition.com\/collections\/casein-protein.oembed","provider":"Bulldog Nutrition","version":"1.0","type":"link"}