Search  for anything...
Optimum Nutrition

Optimum Nutrition Gold Standard Casein Protein Powder, Vanilla, 2 LB

  • Based on 5,817 reviews
Condition: New
Checking for the best price...
$49.99 Why this price?
Save $4.00 was $53.99

Buy Now, Pay Later

As low as $8.33 / mo
  • – 6-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

Non-returnable due to Food safety reasons

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Sep 28
Order within 19 hours and 2 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

Flavor Name: Creamy Vanilla


Size: 2 Pound (Pack of 1)


Features

  • One 1.81 lb container (25 servings) of Optimum Nutrition Gold Standard 100% Micellar Casein Protein Powder in Creamy Vanilla flavor
  • With micellar casein, this Optimum Nutrition protein powder helps support muscle recovery
  • Each serving has 9 grams of naturally occurring Essential Amino Acids
  • Feel good about your after-workout recovery drink
  • Mixes easily with a shaker cup, perfect for packing in your gym bag as part of your training routine

Description

Optimum Nutrition Gold Standard 100% Micellar Casein Protein Powder helps support muscle recovery. Made with micellar casein, this protein shake powder ensures that you're getting high quality protein with every serving. With nearly 9 grams of naturally occurring Essential Amino Acids per serving, this protein powder drink supports recovery, making it ideal for use between meals and before bedtime. Each serving of this delicious Creamy Vanilla-flavored powder is an excellent source of zinc, magnesium and calcium and provides 24 grams of protein. Optimum Nutrition powder mixes easily using a shaker cup or blended in a smoothie. There are 25 servings in this 1.81 pound container. Gold Standard 100% Casein from Optimum Nutrition, the World's 1 Sports Nutrition Brand. Source Euromonitor International Limited; Consumer Health 2023 Edition, Sports Nutrition category, %retail value shares, 2022 data.

Product Dimensions ‏ : ‎ 8.06 x 8.06 x 11.17 inches; 1.81 pounds


Item model number ‏ : ‎ 1031649


Department ‏ : ‎ GNC|ALL|ALL|PWD DIET W MILK NUT FACT


Date First Available ‏ : ‎ April 28, 2004


Manufacturer ‏ : ‎ Glanbia Performance Nutrition


Best Sellers Rank: #3,983 in Health & Household (See Top 100 in Health & Household) #56 in Sports Nutrition Whey Protein Powders #479 in Sales & Deals


#56 in Sports Nutrition Whey Protein Powders:


#479 in Sales & Deals:


Customer Reviews: 4.6 4.6 out of 5 stars (5,817)


Flavor: Creamy Vanilla


Diet Type: Gluten Free


Product Benefits: Muscle Growth, Muscle recovery, Nutritional support, Satiety


Protein Source: Casein


Protein: 24 g


Vitamins And Minerals: 0, 0, 0, 15, 240, 50 percent_daily_value_fda, 11.0, 15.0, 230.0, 500.0, 85.0 milligrams, 230 milligrams


Total Servings Per Container: 25


Item Weight: 1.8 pounds


Unit Count: 32 Ounce


Number of Items: 1


Item Dimensions: 8.06 x 8.06 x 11.17 inches


Brand Name: Optimum Nutrition


Package Type Name: Tub


Age Range Description: Adult


Model Name: Optimum Nutrition Gold Standard 100% Micellar Casein Protein Powder, Slow Digesting, Helps Keep You Full


Global Trade Identification Number: 97


UPC: 748927024197


Item Highlight: 24g of 100% Micellar Casein Protein Per Serving, Slow Digesting, Helps Keep You Full, Overnight Muscle Recovery, Easy Mixing


Manufacturer: Glanbia Performance Nutrition


Model Number: 1031649


Manufacturer Part Number: 1031649


Recommended Uses For Product: Fitness, Post-Workout


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Sep 28

This item is non-returnable:

Non-returnable due to Food safety reasons

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Great product. Dissolves easily and tastes great.
Flavor Name: Creamy Vanilla Size: 2 Pound (Pack of 1)
Great product. Dissolves easily and tastes great.
Reviewed in the United States on September 1, 2026 by Scott G.
    • Good protein!
Flavor Name: Creamy Vanilla Size: 2 Pound (Pack of 1)
Very good taste!
Reviewed in the United States on August 16, 2026 by Alvaro Castillo
    • Essential part of recovery
Flavor Name: Creamy Vanilla Size: 2 Pound (Pack of 1)
For too long I had relied solely on whey protein to help build muscle, especially after intense work outs. It definitely helped, but often times I would wake up the morning after not feeling that much better. In other words, I wasn't really recovering that well. I considered just doubling up on the whey, basically eating another serving before bed, but then I did some research. I figured it would benefit me to alternate the types of protein supplement, and when I added the Optimum Nutrition Casein protein, it was a game changer. I now wake up in the morning feeling back to 100%. Even though I never train the same muscle groups two days in a row, I feel as if I could. I am making a 100% recovery in less than half the time. As a side benefit, the stuff tastes amazing. I mix mine with soy milk (yeah, I drink soy, get over it) and shot of light cream, after reading that a modest amount of fats help the body absorb large amounts of protein. Anyways, the vanilla is a very deep and satisfying flavor. To change it up I sometimes add some cinnamon powder, or some nutmeg and ground clove. On top of that, I eat it just before bed, and I am never super hungry in the morning, and I have eliminated my midnight snack routine. I use a hand crank egg beater to mix this stuff up, because even a little bit quickly turns into a thick mixture, sort of like wet concrete. It needs way more liquid to dissolve into than whey protein powder. Sometimes I also throw in some Greek style yogurt, but this stuff is thick enough already. The labeling says something about how Casein behaves differently when it hits the acid in the stomach, and that it expands, and you see this when you mix it up. If you have been missing something in the protein department, I would absolutely try this Casein. PROS: + Tastes awesome. + Fills you up, you feel satisfied, and won't be hungry for quite a while after. + A little powder goes a long way. + Slow absorption. CONS: - More expensive than most whey protein powders, but that's common to Casein. ... show more
Reviewed in the United States on October 31, 2018 by Bjorn Olafsson
    • Great product
Flavor Name: Creamy Vanilla Size: 2 Pound (Pack of 1)
Good quality, strong packaging, great taste.
Reviewed in the United States on July 21, 2026 by Vishaka Hatcher
    • Great for baking, but taste is subpar
Flavor Name: Creamy Vanilla Size: 4 Pound (Pack of 1)
The taste is what kills it for me. In recipes, it's spectacular. I used it this weekend to make homemade protein cinnamon rolls. I've also used it to make banana bread, cookies, crepes, pancakes, frozen yogurt, and a vanilla cream cheese spread. For the bread products (the products with quite a few other ingredients), this powder is great. But, when you use it as a "main" ingredient (like in the pancakes or frozen yogurt), it has a very protein shake taste. I'm not sure how to describe it. Very fake- like there's too much sugar substitute or something. Like too much vanilla. I'm not sure. My husband hates it. He says it's like the taste of the powder (like if you stuck your finger in the powder and licked it). As a protein shake on it's own with just water, it's ok, but, as with all powders, it depends on your ratio. I've also used it with various fruits/vegetables, and it's much better (same concept as baking). I personally like it with a apple and spinach. Yum! ... show more
Reviewed in the United States on May 8, 2017 by Jonnie
    • Great protein powder!
Flavor Name: Creamy Vanilla Size: 2 Pound (Pack of 1)
I have been a longtime fan of this Casein Protein. It keeps me from getting hungry and I have not found a flavor I didn’t like. This blends well using just a shaker bottle. I usually mix with a couple additional ounces of milk than the directions call for, because that has gotten to be my preference. To each their own preference. ... show more
Reviewed in the United States on March 21, 2026 by T Bak
    • My daily protein powder.
Flavor Name: Creamy Vanilla Size: 4 Pound (Pack of 1)
I do a half a cup a day for breakfast. I've been doing it for years now. Good stuff. I prefer the vanilla for casein and the double rich chocolate for whey.
Reviewed in the United States on August 2, 2026 by James Webb
    • Functionality and flavor are both good
Flavor Name: Creamy Vanilla Size: 2 Pound (Pack of 1)
I have specific health needs that require a high-protein, low-calorie diet, and this protein powder works perfectly as a breakfast meal replacement. I typically mix one scoop with 12 oz of 2% Fairlife milk and 8 oz of cold brew, which totals around 40 grams of protein. On its own, it provides 22 grams of protein per serving, making it easy to use multiple times a day to meet macro goals, even with just water. The flavor isn’t too sweet, and it adds a nice richness without a chalky texture. It also keeps me full from breakfast until my 1:00 PM lunch, even when I start my workday at 8:30 AM. For best results, I recommend using a good mixer bottle. My favorite is the Helimix 22 oz. That said, the powder dissolves well and doesn’t clump, making it easy to mix. Overall, this is a great choice for anyone looking to add quality protein to their diet without unnecessary calories or unpleasant textures. ... show more
Reviewed in the United States on February 24, 2025 by Zoe B.

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...