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-15% Gold Standard 100% Isolate
Optimum Nutrition

Gold Standard 100% Isolate

Best price at Optimum Nutrition

-15%
$144.46 $169.95
$10.62 / 100 g
Order at Optimum Nutrition

You order directly from Optimum Nutrition. This doesn't change the price for you. In fact, with Sportpoeder you always get the lowest price.

A

Best choice

SupplementScore · scale A+ (best) to E

  • Anyone who does not reach their daily protein intake (guideline ±1.6 g per kilo of body weight) from regular food — whey makes that easy
  • With lactose intolerance: choose isolate instead of concentrate
  • Anyone who already gets enough protein from regular food: whey then adds little
  • Whey is not suitable with a cow's milk protein allergy; with chronic kidney disease, individual protein advice from a doctor or dietitian is needed
Reviewed by Android Health Clinic Read the full review ↓

Compare with alternatives

Same type of product, different brands. The cheapest per 100 g is highlighted.

· Gold Standard 100% Isolate Gold Standard 100% Isolate The winner Max’s Pro Series Whey Isolate Max’s Pro Series Whey Isolate · Syntha-6 Isolate Syntha-6 Isolate · Ice by Ice by
Price $144.46 $122.95 $149.95 $199.95
SupplementScore A — — —
Per 100 g $10.62 / 100 g $6.83 / 100 g $7.89 / 100 g $8.00 / 100 g
Shop review 4,8 5,0 5,0 5,0
Shop Optimum Nutrition Max's Supplements BSN Supplements Horleys
This product View product View product View product

Product information

Shop
Optimum Nutrition
Form
Powder
Contents
1.36 kg
Dosage (label)
25 g eiwit per serving
Whey form
Whey-isolaat, 81% eiwit
SupplementScore®

An independent assessment of ingredients, dosage and quality, based on public sources.

A

Best choice

Gold Standard 100% Isolate · Optimum Nutrition

On a scale from A+ (best) to E

How is this score determined?

Reviewed by Android Health Clinic
Check the letter yourself · 7 points
Protein per serving25 g
+4 / 4
Leucine per servingnot declared
0 / 1
Protein content per 100 g81% (isolate standard)
+2 / 4
Full amino acid profile on the labelyes
+1 / 1

Scale: 9–10 = A+ · 7–8 = A · 5–6 = B · 3–4 = C · 2 or less = D; ±20 g of complete protein never drops below B

What is this useful for?

Whey is mainly a convenient way to reach your daily protein intake — it has no magic effect beyond other high-quality protein sources. If you get enough protein from regular food you do not need it, but in practice that is often a challenge; a guideline for building and keeping muscle is about 1.6 grams of protein per kilo of body weight per day. With lactose intolerance, concentrate can cause complaints and isolate is often the better choice; whey is not suitable with a cow's milk protein allergy. In healthy people a high protein intake has not been shown to harm the kidneys; with existing chronic kidney disease, individual protein advice from a doctor or dietitian is needed. Approved sweeteners in the amounts used in whey are not a medical problem — which sweetener you want is a personal choice, not a quality difference. (Review: Android Health Clinic.)

Sources

Product page/label · whey scorecard v3.1 · medically reviewed by Android Health Clinic

Model version 3.1 · 30 August 2026 · version history

Not a partner: we earn nothing here. The score follows the same public rules as for partner products.

How does the SupplementScore work?

Ratings

4,8

Shop rating · 119 · via Optimum Nutrition

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Best price
$144.46
Order at Optimum Nutrition