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Customer reviews for Optimum Nutrition, Gold Standard 100% Whey Protein Powder, Extreme Milk Chocolate, 5.64 lbs. for
Optimum Nutrition, Gold Standard 100% Whey Protein Powder, Extreme Milk Chocolate, 5.64 lbs.
4.6 out of 5 stars
stars212 ratings79 reviews
  1. 5 stars83% (175)
  2. 4 stars7% (15)
  3. 3 stars2% (5)
  4. 2 stars3% (6)
  5. 1 star5% (11)
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Showing 1-10 of 79 reviews
Jan 31, 2026
Me
5 out of 5 stars review

Verified Purchase

Good stuff I hope.

I don't know how many gallons of this stuff I've chugged over the years, but the extreme milk chocolate is the best tasting protein powder I've found.

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Mar 8, 2026
JT
5 out of 5 stars review

Verified Purchase

Excellent tasting protein!

I have tried many brands of protein. This brand is excellent! I purchased both flavors vanilla and chocolate. Both have a great taste and I will definitely purchase again. I also use GNC for buying most of my protein supplements. The price is actually better than when GNC is have a sale.

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Mar 30, 2026
Sams Shopper
5 out of 5 stars review

Verified Purchase

Ideal for ON whey fans

I’ve been hoping Sam’s would carry Optimum Nutrition, and was delighted to find the Extreme Chocolate in the store by chance. The resealable bag is very convenient, and it’s a great price.

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Nov 3, 2025
Flo
5 out of 5 stars review

Verified Purchase

Proven Protein Staple

Optimum Nutrition’s Gold Standard 100% Whey has been my go-to protein powder for years, and it continues to deliver both in quality and taste. The blend of whey isolate and concentrate provides an excellent protein source that’s easy on the stomach and mixes smoothly — no clumping, even when using just a shaker bottle. Flavor-wise, it’s one of the most consistent products out there. The Double Rich Chocolate and Vanilla Ice Cream flavors are both rich without being overly sweet, and they mix well into oatmeal, smoothies, or just water. Each serving gives you about 24 grams of protein, 1 gram of sugar, and minimal fat — perfect for supporting recovery and maintaining lean muscle without unnecessary fillers. It also digests well thanks to the added digestive enzymes (lactase), which makes it a good choice even for those sensitive to dairy. I’ve noticed faster recovery and less soreness after workouts when using it consistently post-training.

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Jan 31, 2026
Ann
5 out of 5 stars review

Verified Purchase

Gold Standard Whey!!!

The best whey product out on the market! Appreciate the price you have it for. Space saving over canisters on my shelf.

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Nov 16, 2025
Roll Call
5 out of 5 stars review

Verified Purchase

Great to see it here

It's really great to see tgis available in Sam's and at a great price. Even if it wasn't i would pay for conveniences having ot available. Overall a great product and i would recommend 👌🏼

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Apr 21, 2026
TC
5 out of 5 stars review

Verified Purchase

Overall great

Great quality, easy access, good packaging.

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Jan 25, 2026
Hayden
5 out of 5 stars review

Verified Purchase

Continue to buy

A staple of the week. Have been using for years and being available at Sam’s makes things very convenient

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reply from Optimum Nutrition

Forever a Sam's Club staple! 

Feb 6, 2026
Gldlks3
2 out of 5 stars review

Verified Purchase

Disappointed

I usually love ON products, but not this one. When mixed up this protein powder is very thin and not very chocolatey. It is an isolate protein which had i known that I wouldn't have purchased it to begin with. It is marked isolate in small print on the bottom right of yhe yhe bag.

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Apr 3, 2026
Julie M
1 out of 5 stars review

Verified Purchase

Tasted sour

I mixed up my usual amount and took one sip only to find it was sour! Nothing worse than sour milk protein. I've had this issue more frequently with this brand. I will be returning this bag.

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