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Dymatize ISO100 Hydrolyzed Whey vs Optimum Nutrition Gold Standard 100% Whey

Buy the Dymatize ISO100 if you want the fastest-digesting whey and a leaner label: it is hydrolyzed isolate with 25 g protein, no added sugar and very low carb and lactose. Buy Gold Standard if you want a bigger tub, more flavor choice and a proven all-whey blend at a lower cost per serving. Both rate 4.5 stars and owners praise mixability and taste; ISO100 is the step up for lactose-sensitive or cutting users, Gold Standard is the better everyday staple.

  • Choose the Dymatize ISO100 if you want hydrolyzed whey isolate that digests fast, sits light on the stomach and keeps carbs and sugar minimal.
  • Choose the Gold Standard 100% Whey if you want a large tub, more flavors and a trusted isolate-first blend for daily shakes.

Prices

  • Dymatize ISO100 Hydrolyzed Whey: $57.04 at Vitacost.com (last seen Nov 9)
  • Optimum Nutrition Gold Standard 100% Whey: $39.99 at Hy-Vee (last seen Nov 12)
  • Difference: the Optimum Nutrition Gold Standard 100% Whey is $17.05 cheaper than the Dymatize ISO100 Hydrolyzed Whey at the latest prices (Nov 9 and Nov 12)
Dymatize
Dymatize ISO100 Hydrolyzed Protein Powder

Dymatize ISO100 Hydrolyzed Whey

Dymatize ISO100 Hydrolyzed Protein Powder

4.5(1,300 ratings)
$57.04at Vitacost.comChecked Nov 9
See all prices and details
Visit Vitacost.com
Pros
  • Hydrolyzed isolate absorbs fast
  • 25 g protein with minimal carbs and sugar
  • 5.5 g BCAAs, 2.7 g leucine
  • Light on the stomach for lactose-sensitive users
Cons
  • Only 20 servings per tub
  • Fewer flavors
  • Hydrolyzed whey usually costs more per serving
Optimum Nutrition
Optimum Nutrition Gold Standard 100% Vanilla Ice Cream 2.27kg

Optimum Nutrition Gold Standard 100% Whey

Optimum Nutrition Gold Standard 100% Vanilla Ice Cream 2.27kg

4.5(432 ratings)
$39.99at Hy-VeeChecked Nov 12
See all prices and details
Visit Hy-Vee
Pros
  • Large 5 lb tub lasts longer
  • More than 20 flavors
  • Isolate-first blend with 24 g all-whey protein
  • No artificial flavors, sweeteners or colors
Cons
  • Contains some lactose from concentrate
  • Slightly lower protein per serving
  • Not hydrolyzed, so slower than ISO100

What separates them

Dymatize ISO100 Hydrolyzed WheyOptimum Nutrition Gold Standard 100% Whey
Protein per serving25 g24 g
Protein sourceHydrolyzed whey isolate, pre-digested for fast absorptionWhey isolate first, blended with whey concentrate
Carbs, sugar and lactoseLow carb, no added sugar, most lactose filtered outLow carb but contains some lactose from concentrate
BCAAs per serving5.5 g including 2.7 g leucine5.5 g naturally occurring
Flavor rangeChocolate and a few other flavorsMore than 20 flavors
Tub size and servings20-serving tub5 lb tub, roughly 70+ servings
MixingInstantized, dissolves clean with little foamInstantized, mixes easily in a shaker
Sweeteners and additivesNo added sugar; uses sucralose and acesulfame potassiumNo artificial flavors, sweeteners or colors in this formula

Price history

$91.47$21.99
Oct 29Nov 14
  • Dymatize ISO100 Hydrolyzed Whey: lowest $35.49 on Nov 10 at Target; $38.54 on Nov 14.
  • Optimum Nutrition Gold Standard 100% Whey: lowest $21.99 on Nov 13 at Walgreens.com; $91.47 on Nov 14.

Prices at every store

Dymatize ISO100 Hydrolyzed Whey

  • DICK'S Sporting GoodsNew

    In stock

    $57.99+ $9.99 shippingChecked 16 h ago
    Visit DICK'S Sporting Goods
  • ShopRiteNew

    In stock

    $59.99+ $19.00 shippingChecked 21 h ago
    Visit ShopRite
  • Vitacost.comNew

    Availability unknown

    $57.04Checked Nov 9
    Visit Vitacost.com
  • Vitacost.comNew

    Availability unknown

    $64.16Checked Nov 9
    Visit Vitacost.com

Also available at

  • AmazonCheck price at Amazon
  • WalmartCheck price at Walmart
  • DPS NutritionCheck price at DPS Nutrition

Store links may earn us a commission.

All 4 stores and price history →

Optimum Nutrition Gold Standard 100% Whey

  • Hy-VeeNew

    In stock

    $39.99Checked Nov 12
    Visit Hy-Vee
  • WalmartNew

    In stockSold by Nutrition DepotReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

    $62.94Free shippingChecked 21 h ago
    Visit Walmart
  • Muscle & StrengthNew

    In stock

    $59.99+ $5.89 shippingChecked Nov 12
    Visit Muscle & Strength
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $50.28Free shippingChecked 21 h ago
    Visit Amazon

Also available at

  • WalmartCheck price at Walmart
  • Walgreens.comCheck price at Walgreens.com
  • Ulta BeautyCheck price at Ulta Beauty

Store links may earn us a commission.

All 11 stores and price history →

Specs compared

SpecDymatize ISO100 Hydrolyzed WheyOptimum Nutrition Gold Standard 100% Whey
FlavorChocolateVanilla
Size20 Servings5 lbs
FormPowder—
IngredientsAmino Acids—
Amino Acid TypeBCAA—
Protein Grams Per Serving25 g per serving—
Protein TypeWhey—
Low CarbYes—
Sugar ContentNo Sugar Added—
Weight (oz)—80.1
Amino Acids—BCAA
Protein—Whey Protein
Show all 15 specsShow fewer specs
SpecDymatize ISO100 Hydrolyzed WheyOptimum Nutrition Gold Standard 100% Whey
material—Vanilla Ice Cream
shape—Vanilla Ice Cream
color—Vanilla Ice Cream

What reviewers say

Dymatize ISO100 Hydrolyzed Whey

  • 4.5 / 51,300 ratings

Owners rate ISO100 highly for mixing cleanly and sitting light on the stomach, and many use it daily post-workout. The main complaints are price and a sweet, sometimes artificial taste in the chocolate.

What people mention
  • MixabilityPraisedReviewers say it dissolves in water with little grit or clumping.
  • DigestionPraisedMany report less bloating than with whey concentrate.
  • TasteMixedChocolate is liked by most but called sweet or artificial by some.
  • ValueCriticisedBuyers note the isolate price per serving is high.

Optimum Nutrition Gold Standard 100% Whey

  • 4.5 / 5432 ratings

With 432 ratings averaging 4.5 out of 5, buyers largely rate it highly for mixability, taste and protein content. Complaints tend to center on sweetness and the lactose in the concentrate.

What people mention
  • MixabilityPraisedBuyers say it dissolves readily in a shaker with few clumps.
  • TasteMixedMost like the vanilla, but some find it too sweet.
  • Protein contentPraisedUsers value the 24 g of whey protein and BCAA count per serving.
  • DigestionCriticised

Questions and answers

Which is better for lactose sensitivity?
ISO100. It is hydrolyzed isolate with most lactose removed, so it tends to cause less bloating. Gold Standard includes whey concentrate, which carries some lactose.
Which mixes better?
Both are instantized and mix cleanly in a shaker. Owners of each report little clumping; ISO100 foams slightly less in water.
Is ISO100 worth stepping up to over Gold Standard?
Yes if you want faster absorption, lower carbs or a lighter stomach. If you just want a daily shake and more flavor choice, Gold Standard covers it.
Which has more protein per serving?
ISO100 at 25 g versus 24 g for Gold Standard. The gap is small; both deliver 5.5 g BCAAs.
Which lasts longer?
Gold Standard. Its 5 lb tub holds far more servings than the 20-serving ISO100 tub.
Can I use either for muscle gain?
Yes. Both are complete whey proteins with leucine for muscle protein synthesis. Pair either with enough total daily protein and calories.

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A few lactose-sensitive buyers report discomfort from the concentrate.