{"id":171608,"date":"2025-08-24T11:53:21","date_gmt":"2025-08-24T11:53:21","guid":{"rendered":"https:\/\/www.europesays.com\/us\/171608\/"},"modified":"2025-08-24T11:53:21","modified_gmt":"2025-08-24T11:53:21","slug":"optimum-nutrition-gold-standard-100-casein-review-2025","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/us\/171608\/","title":{"rendered":"Optimum Nutrition Gold Standard 100% Casein Review 2025"},"content":{"rendered":"<p>The protein powder industry is vast, comprising dozens of options that range from whey to casein formulas. The latter is a great option for individuals on weight-loss journeys due to being slower to digest than whey. After researching the market for high-quality protein powders and consulting nutrition experts, our expert gear and wellness editor chose <a class=\"affiliate-link affiliate-active\" href=\"https:\/\/www.amazon.com\/NUTRITION-STANDARD-Digesting-Overnight-Chocolate\/dp\/B002DYJ0OI\/?tag=2025221-r4lnnkvxmj-20&amp;linkCode=ll1&amp;ref=as_li_ss_tl\" affiliate-data=\"{&quot;affiliateLink&quot;:&quot;https:\/\/www.amazon.com\/NUTRITION-STANDARD-Digesting-Overnight-Chocolate\/dp\/B002DYJ0OI\/?tag=2025221-r4lnnkvxmj-20&amp;linkCode=ll1&amp;ref=as_li_ss_tl&quot;,&quot;purchaseLink&quot;:&quot;https:\/\/www.amazon.com\/NUTRITION-STANDARD-Digesting-Overnight-Chocolate\/dp\/B002DYJ0OI\/&quot;}\" data-link-rand-id=\"3c0e3c1e-3008-4f11-9f78-ea040eb4f3ca\" title=\"https:\/\/www.amazon.com\/NUTRITION-STANDARD-Digesting-Overnight-Chocolate\/dp\/B002DYJ0OI\/?tag=2025221-r4lnnkvxmj-20&amp;linkCode=ll1&amp;ref=as_li_ss_tl\" aria-label=\"Optimum Nutrition\u2019s Gold Standard 100% Casein Powder\" target=\"_blank\" data-aps-asin=\"B002DYJ0OI\" data-aps-asc-tag=\"2025221-r4lnnkvxmj-20\" rel=\"nofollow noopener\" data-ga-track=\"ExternalTextLink:68a347b717dfe22989399925|finds|amazon.com|none|none|Optimum Nutrition\u2019s Gold Standard 100% Casein Powder|none\">Optimum Nutrition\u2019s Gold Standard 100% Casein Powder<\/a> as his top pick for weight loss. Its formulation is simple and utilizes high-quality ingredients to support muscle recovery, and its casein protein digests more slowly than whey, which in turn helps curb your appetite.<\/p>\n<p><a class=\"image-embed-link color-link image-embed__placeholder\" href=\"https:\/\/www.amazon.com\/NUTRITION-STANDARD-Digesting-Overnight-Chocolate\/dp\/B002DYJ0OI\/?tag=2025221-r4lnnkvxmj-20&amp;linkCode=ll1&amp;ref=as_li_ss_tl\" target=\"_blank\" rel=\"nofollow noopener\" aria-label=\"FORBES.com\" style=\"padding-top:56.12%;position:relative\" data-ga-track=\"ExternalPrimaryImageLink:68a347b717dfe22989399925|finds|amazon.com|none|none|none|none\" data-aps-asin=\"B002DYJ0OI\" data-aps-asc-tag=\"2025221-r4lnnkvxmj-20\"><img decoding=\"async\" src=\"https:\/\/www.europesays.com\/us\/wp-content\/uploads\/2025\/08\/1756036400_798_960x0.jpg\" alt=\"product image of Optimum Nutrition\u2019s Gold Standard 100% Casein Powder tub w\/ chocolate\" data-height=\"900\" data-width=\"1600\" style=\"position:absolute;top:0\" data-ga-track=\"ExternalPrimaryImageLink:68a347b717dfe22989399925|finds|amazon.com|none|none|none|none\"\/><\/a><\/p>\n<p>Optimum Nutrition\u2019s Gold Standard 100% Casein Powder is our top choice for weight loss due to its clean casein protein that&#8217;s slow-digesting to help curb cravings.<\/p>\n<p>ILLUSTRATION: FORBES \/ PHOTO: RETAILER<\/p>\n<p>Optimum Nutrition\u2019s casein protein powder, which was deemed the best formula for weight loss in our <a class=\"color-link\" href=\"https:\/\/www.forbes.com\/sites\/forbes-personal-shopper\/article\/best-protein-powder\/\" data-ga-track=\"InternalLink:https:\/\/www.forbes.com\/sites\/forbes-personal-shopper\/article\/best-protein-powder\/\" target=\"_self\" aria-label=\"protein powder roundup\" rel=\"noopener\">protein powder roundup<\/a>, stands out mainly for its sustained amino acid release, creamy texture and rich flavor. Its slow-digestion properties also make this pick ideal to use before bed to support muscle recovery overnight. Plus, it has a comparatively clean formulation: \u201cOptimum Nutrition has really high quality control, making it one of the cleanest options regarding additives,\u201d says dietician Janelle Bober of Dietician Live.<\/p>\n<p>Optimum Nutrition Gold Standard 100% Casein Protein Powder (2-Pound)<\/p>\n<p><strong>Protein per serving:<\/strong> 24 grams <strong>| Serving size: <\/strong>1 scoop (34 grams) <strong>| Protein source: <\/strong>Micellar casein <strong>| Ingredients:<\/strong> Natural and artificial flavors, no added sugar (uses <a class=\"color-link\" href=\"https:\/\/ific.org\/resources\/articles\/what-is-sucralose\/\" target=\"_blank\" rel=\"nofollow noopener\" data-ga-track=\"ExternalModuleTextLink:68a347b717dfe22989399925|finds|amazon.com|1|Optimum Nutrition Gold Standard 100% Casein Protein Powder (2-Pound)|sucralose|none\" aria-label=\"sucralose\">sucralose<\/a>) <strong>|<\/strong> <strong>Servings per container<\/strong>: 25 <strong>|<\/strong> <strong>Flavors<\/strong>: 4, including Chocolate Supreme and Creamy Vanilla<\/p>\n<p><strong>Best for:<\/strong><\/p>\n<ul>\n<li>Keeping you fuller for longer than whey protein powders<\/li>\n<li>Fans of a thick, smooth shake texture and rich chocolate or vanilla flavors<\/li>\n<li>A nighttime snack that still supports muscle recovery<\/li>\n<\/ul>\n<p><strong>Skip if:<\/strong><\/p>\n<ul>\n<li>You don\u2019t prefer thick shakes<\/li>\n<li>You don\u2019t like artificial flavors\/sweeteners<\/li>\n<\/ul>\n<p><a href=\"http:\/\/www.forbes.com\/sites\/forbes-personal-shopper\/article\/kinds-of-protein-powders\/\" aria-label=\"Graphic 4 Kinds Of Protein Powders And Which One Is Right For You, According To Fitness Experts\" data-ga-track=\"shopping recirc|More From Forbes Vetted|68a360308489e19d893ff8de|1\" class=\"kDIGV\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/www.europesays.com\/us\/wp-content\/uploads\/2025\/08\/1756036401_707_960x0.jpg\" alt=\"Graphic 4 Kinds Of Protein Powders And Which One Is Right For You, According To Fitness Experts\"\/><\/a><a href=\"http:\/\/www.forbes.com\/sites\/forbes-personal-shopper\/article\/best-protein-powder\/\" aria-label=\"Graphic The 7 Best Protein Powders, With Insights From Dietitians\" data-ga-track=\"shopping recirc|More From Forbes Vetted|67a12cb9c6839d14c71ded25|2\" class=\"kDIGV\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/www.europesays.com\/us\/wp-content\/uploads\/2025\/08\/1756036401_868_960x0.jpg\" alt=\"Graphic The 7 Best Protein Powders, With Insights From Dietitians\"\/><\/a><br \/>\nOptimum Nutrition Gold Standard 100% Casein Features<br \/>\nCasein: A Complete Protein That Boosts Metabolism<\/p>\n<p>The not-so-secret ingredient that helps control appetite in this formula is the micellar casein, which is a milk protein. Casein is a high-quality, complete protein because it consists of all the essential amino acids you need to maintain lean muscle, says certified fitness and nutrition expert Sarah Pelc Graca. \u201cThis is important for weight management because keeping muscle mass helps boost your metabolism (compared to fat) while you are consuming fewer calories,\u201d she explains.<\/p>\n<p>Casein isn\u2019t the only high-impact ingredient in Optimum Nutrition\u2019s formula, though. \u201cIt also has a decent dose of magnesium (85 mg) and zinc (11 mg), which support muscle function, sleep, recovery and hydration,\u201d says Bober.<\/p>\n<p>Casein Also Helps You Feel Fuller For Longer<\/p>\n<p>Casein is also a slow-digesting protein, taking several hours to break down. \u201cThink of it like an extended release medication\u2014it helps you feel fuller for longer,\u201d Bober says. Protein availability is sustained over extended periods of time, which, she explains, \u201csupports lean mass preservation and helps with long-term metabolism through satiety.\u201d<\/p>\n<p>This characteristic is particularly helpful for individuals who want to cut down on snacking between meals or tend to indulge in late-night munching, according to Graca. \u201cSome people even turn it into a high-protein dessert at night (yum!), which also helps satisfy sweet cravings without hindering progress,\u201d she adds.<\/p>\n<p>Bonus Benefits For Weight Loss<\/p>\n<p>Another benefit to casein being a slow-digesting protein is that it won\u2019t impact how you metabolize overnight. \u201cControlled studies show it doesn\u2019t change your resting energy expenditure at night when you\u2019re digesting and resting, so there\u2019s not a big shift in metabolic adaptation,\u201d says Bober, adding that this is particularly noteworthy for people with insulin sensitivities or obesity. This is also why many users consume it before bed: Your muscles continue to draw from sustained protein availability overnight to keep rebuilding, which can help decrease muscle soreness the day after.<\/p>\n<p>Optimum Nutrition\u2019s casein formula also exceeds the minimum grams-to-calorie ratio that Bober recommends if you\u2019re looking to lose weight. \u201cI recommend a 10% grams-to-calorie ratio for weight loss, so if you have a serving with 240 calories, 24 grams of protein would be ideal,\u201d she explains. And since this protein powder has 24 grams of protein per 120 calories, it exceeds Bober\u2019s criteria: \u201cA high-protein, calorie-restricted diet is the gold standard for weight loss,\u201d she says.<\/p>\n<p>The nutritional information for the Chocolate Supreme flavor of Optimum Nutrition&#8217;s Gold Standard 100% Casein protein powder.<\/p>\n<p>optimum nutrition<br \/>\nCreamy Texture And Rich Flavor<\/p>\n<p>Fans of thick, extra-creamy protein shakes will like this casein protein powder. \u201cIt mixes more like a pudding when you use less water or milk,\u201d says Graca. Casein protein powder is also a lot smoother compared to plant protein powders, which tend to be grainy, adds Bober. Tom Ahmad, certified sports nutritionist with Same Day Supplements, agrees\u2014and vouches for the Chocolate Supreme flavor, which he\u2019s used several times. \u201cIt\u2019s smooth, enjoyable and thick, making it a perfect filling nighttime shake or snack that can also support recovery,\u201d he notes.<\/p>\n<p>Reasons You May Not Like This Formula<\/p>\n<p>While all three experts recommend Optimum Nutrition\u2019s Gold Standard Casein protein powder for its high-quality protein, creamy consistency and smooth flavor, it\u2019s not for everyone. If you\u2019re not a fan of very thick shakes, opt for a powder that uses a faster-digesting protein like whey (see our top pick from our best protein powders roundup, the <a class=\"affiliate-link affiliate-active\" href=\"https:\/\/www.amazon.com\/Optimum-Nutrition-Standard-Protein-Chocolate\/dp\/B002DYIZH6\/?tag=2025221-r4lnnkvxmj-20&amp;linkCode=ll1&amp;ref=as_li_ss_tl\" affiliate-data=\"{&quot;affiliateLink&quot;:&quot;https:\/\/www.amazon.com\/Optimum-Nutrition-Standard-Protein-Chocolate\/dp\/B002DYIZH6\/?tag=2025221-r4lnnkvxmj-20&amp;linkCode=ll1&amp;ref=as_li_ss_tl&quot;,&quot;purchaseLink&quot;:&quot;https:\/\/www.amazon.com\/Optimum-Nutrition-Standard-Protein-Chocolate\/dp\/B002DYIZH6\/&quot;}\" data-link-rand-id=\"5619671d-c603-4eaf-9b28-751d8b9e5f47\" title=\"https:\/\/www.amazon.com\/Optimum-Nutrition-Standard-Protein-Chocolate\/dp\/B002DYIZH6\/?tag=2025221-r4lnnkvxmj-20&amp;linkCode=ll1&amp;ref=as_li_ss_tl\" aria-label=\"Optimum Nutrition Gold Standard Whey Protein Powder\" target=\"_blank\" data-aps-asin=\"B002DYIZH6\" data-aps-asc-tag=\"2025221-r4lnnkvxmj-20\" rel=\"nofollow noopener\" data-ga-track=\"ExternalTextLink:68a347b717dfe22989399925|finds|amazon.com|none|none|Optimum Nutrition Gold Standard Whey Protein Powder|none\">Optimum Nutrition Gold Standard Whey Protein Powder<\/a>). That said, most reviews say this formula is easy to mix with water or milk and blends reasonably well in shaker bottles.<\/p>\n<p>Further, while this formula is one of the cleanest on the market, it still uses some artificial flavoring and the sugar substitute sucralose. The majority of reviewers find the flavors pleasantly sweet but not cloying (particularly the Chocolate Supreme and Creamy Vanilla varieties) and appreciate that it only contains 1 gram of sugar; a few others, though, say they can taste a bit of the artificial flavoring. Further, anyone with sensitivities to either of these ingredients should find an alternative product.<\/p>\n<p>Final Thoughts<\/p>\n<p>Before you decide on this particular protein powder, Bober has one last bit of advice: \u201cMake sure you tolerate it well and consider whether you want plant-based or animal-based protein, plus look at the vitamins and minerals present.\u201d But overall, if you\u2019re looking for a high-quality protein powder and are on a weight-loss journey, Optimum Nutrition\u2019s casein formula is a smart choice, says Graca. \u201cIt is especially useful for those who struggle with hunger between meals or want a filling evening snack that aligns with their goals.\u201d<\/p>\n<p>If weight loss isn\u2019t your primary goal\u2014maybe its muscle building, or simply adding more protein into your day\u2014there are other formulas to consider. See our guide outlining <a class=\"color-link\" href=\"https:\/\/www.forbes.com\/sites\/forbes-personal-shopper\/article\/kinds-of-protein-powders\/\" data-ga-track=\"InternalLink:https:\/\/www.forbes.com\/sites\/forbes-personal-shopper\/article\/kinds-of-protein-powders\/\" target=\"_self\" aria-label=\"popular kinds of protein powders\" rel=\"noopener\">popular kinds of protein powders<\/a> to find the best product to suit your needs.<\/p>\n<p>Why Trust Forbes Vetted<\/p>\n<p>Forbes Vetted\u2019s gear team is responsible for our in-depth <a class=\"color-link\" href=\"https:\/\/www.forbes.com\/vetted\/gear\/\" data-ga-track=\"InternalLink:https:\/\/www.forbes.com\/vetted\/gear\/\" target=\"_self\" aria-label=\"guides on all things active\" rel=\"noopener\">guides on all things active<\/a>, which are a culmination of in-depth research, expert advice and hands-on testing. We cover topics that range from <a class=\"color-link\" href=\"https:\/\/www.forbes.com\/vetted\/gear\/wellness\/\" data-ga-track=\"InternalLink:https:\/\/www.forbes.com\/vetted\/gear\/wellness\/\" target=\"_self\" aria-label=\"personal wellness\" rel=\"noopener\">personal wellness<\/a> to <a class=\"color-link\" href=\"https:\/\/www.forbes.com\/vetted\/gear\/fitness\/\" data-ga-track=\"InternalLink:https:\/\/www.forbes.com\/vetted\/gear\/fitness\/\" target=\"_self\" aria-label=\"fitness equipment\" rel=\"noopener\">fitness equipment<\/a> and beyond.<\/p>\n<ul>\n<li>We\u2019ve showcased our authority on <a class=\"color-link\" href=\"https:\/\/www.forbes.com\/sites\/forbes-personal-shopper\/article\/best-protein-powder\/\" data-ga-track=\"InternalLink:https:\/\/www.forbes.com\/sites\/forbes-personal-shopper\/article\/best-protein-powder\/\" target=\"_self\" aria-label=\"protein powders\" rel=\"noopener\">protein powders<\/a> specifically, having published a popular best list that includes vetted, expert-approved products.<\/li>\n<li>This story was written by Forbes Vetted home updates writer <a class=\"color-link\" href=\"https:\/\/www.forbes.com\/sites\/forbes-personal-shopper\/people\/fransales\/\" data-ga-track=\"InternalLink:https:\/\/www.forbes.com\/sites\/forbes-personal-shopper\/people\/fransales\/\" target=\"_self\" aria-label=\"Fran Sales\" rel=\"noopener\">Fran Sales<\/a>. An avid researcher and product tester, Sales is experienced at conducting rigorous deep-dives and expert interviews for complex subjects, from <a class=\"color-link\" href=\"https:\/\/www.forbes.com\/sites\/forbes-personal-shopper\/article\/best-robotic-pool-cleaner\/\" data-ga-track=\"InternalLink:https:\/\/www.forbes.com\/sites\/forbes-personal-shopper\/article\/best-robotic-pool-cleaner\/\" target=\"_self\" aria-label=\"robot pool vacuums\" rel=\"noopener\">robot pool vacuums<\/a> to <a class=\"color-link\" href=\"https:\/\/www.forbes.com\/sites\/forbes-personal-shopper\/article\/best-window-air-conditioners\/\" data-ga-track=\"InternalLink:https:\/\/www.forbes.com\/sites\/forbes-personal-shopper\/article\/best-window-air-conditioners\/\" target=\"_self\" aria-label=\"window air conditioners\" rel=\"noopener\">window air conditioners<\/a>.<\/li>\n<li>It was reviewed by Forbes Vetted gear editor <a class=\"color-link\" href=\"https:\/\/www.forbes.com\/sites\/forbes-personal-shopper\/people\/cam-vigliotta\/\" data-ga-track=\"InternalLink:https:\/\/www.forbes.com\/sites\/forbes-personal-shopper\/people\/cam-vigliotta\/\" target=\"_self\" aria-label=\"Cam Vigliotta\" rel=\"noopener\">Cam Vigliotta<\/a>, who\u2019s been evaluating and testing outdoor, training and wellness equipment for the past six years. He has a degree in kinesiology, which gives him unique insight into how protein powders can help with muscle recovery and complement your dietary goals.<\/li>\n<li>To make sure the Optimum Nutrition Gold Standard Casein formula is the best in its category, we consulted three nutrition experts for this review: <a class=\"color-link\" href=\"https:\/\/dietitianlive.com\/team\/janelle-bober\/\" target=\"_blank\" rel=\"nofollow noopener\" data-ga-track=\"ExternalTextLink:68a347b717dfe22989399925|finds|dietitianlive.com|none|none|Janelle Bober|none\" aria-label=\"Janelle Bober\">Janelle Bober<\/a>, MS, RDN, a registered dietitian nutritionist at <a class=\"color-link\" href=\"https:\/\/dietitianlive.com\/\" target=\"_blank\" rel=\"nofollow noopener\" data-ga-track=\"ExternalTextLink:68a347b717dfe22989399925|finds|dietitianlive.com|none|none|Dietician Live|none\" aria-label=\"Dietician Live\">Dietician Live<\/a>, a telehealth provider that offers personalized dietician services; <a class=\"color-link\" href=\"https:\/\/strongwithsarah.com\/about-me\" target=\"_blank\" rel=\"nofollow noopener\" data-ga-track=\"ExternalTextLink:68a347b717dfe22989399925|finds|strongwithsarah.com|none|none|Sarah Pelc Graca|none\" aria-label=\"Sarah Pelc Graca\">Sarah Pelc Graca<\/a>, CPT, PN-L1, a fitness and nutrition expert at Strong With Sarah LLC; and Talib \u201cTom\u201d Ahmad, NASM, CNC, a certified sports nutritionist and SEO manager at <a href=\"https:\/\/www.samedaysupplements.com\/\" target=\"_blank\" rel=\"nofollow noopener\" data-ga-track=\"ExternalTextLink:68a347b717dfe22989399925|finds|samedaysupplements.com|none|none|Same Day Supplements|none\" aria-label=\"Same Day Supplements\">Same Day Supplements<\/a>.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"The protein powder industry is vast, comprising dozens of options that range from whey to casein formulas. The&hellip;\n","protected":false},"author":3,"featured_media":171609,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[37],"tags":[97995,97998,97997,97999,210,1182,97996,67,132,68],"class_list":{"0":"post-171608","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-nutrition","8":"tag-best-protein-powder","9":"tag-best-protein-powder-for-weight-loss","10":"tag-best-protein-powders","11":"tag-best-protein-powders-2025","12":"tag-health","13":"tag-nutrition","14":"tag-optimum-nutrition-gold-standard-casein","15":"tag-united-states","16":"tag-unitedstates","17":"tag-us"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@us\/115083608390962946","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/posts\/171608","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/comments?post=171608"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/posts\/171608\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/media\/171609"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/media?parent=171608"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/categories?post=171608"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/tags?post=171608"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}