Optimum Nutrition Gold Standard Casein Protein Powder
Today
Typical price$85
Amazon: the cheapest today among the stores checked
Buy on AmazonOptimum Nutrition Gold Standard Casein Protein Powder or Scitec Nutrition 100% Whey Protein Professional?
100% Whey Protein Professional costs $1 less today, across the stores checked.
Optimum Nutrition Gold Standard Casein Protein Powder is the cheaperScitec Nutrition 100% Whey Protein Professional is $1 the cheaper
The comparison in detail
Scitec Nutrition 100% Whey Protein Professional
Today
Typical price$84
Amazon: the cheapest today among the stores checked
Buy on AmazonAffiliate links: if you buy, the store pays us a commission at no cost to you.
Both prices over the last 30 days
First data point for one of the two: the chart appears as the days go by.
Still only a few days of data for both to read the trend; the chart fills in as the days go by.
Where is each one cheapest today?
Updated 06/11/2026
Gold Standard Casein Protein Powder
- Amazon Lowest price$85Buy on Amazon
100% Whey Protein Professional
- Amazon Lowest price$84Buy on Amazon
Spec sheet side by side
| Item | Gold Standard Casein Protein Powder | 100% Whey Protein Professional |
|---|---|---|
| Specs | ||
| Type | Protein | Protein |
| General | ||
| Model changes | Gold Standard Casein Protein Powder | 100% Whey Protein Professional |
Other comparisons
Gold Standard Casein Protein Powder orDymatize Bundle ISO100 Hydrolyzed Protein Powder in Fruity Pebbles & Cocoa$85Compare- 100% Whey Protein Professional orDymatize Bundle ISO100 Hydrolyzed Protein Powder in Fruity Pebbles & Cocoa$85Compare
Gold Standard Casein Protein Powder orMutant WHEY, 100% Whey Protein Powder, Vanilla Ice Cream, 5 lb$86Compare- 100% Whey Protein Professional orMutant WHEY, 100% Whey Protein Powder, Vanilla Ice Cream, 5 lb$86Compare
100% Whey Protein Professional orPuori PW1, Grass Fed Whey Protein Powder, Bourbon Vanilla, 30 Servings$79Compare
How we choose
Source: Catalog of partner stores, checked on 06/11/2026.
Lowest price seen for the product in the stores we read, on the day it was read, before sales tax. The model is the brand plus the name of the supplement; the versions go in the table. The price range, the median and the position use only models with a score; the price comparison looks at models whose score is within 0.5 points.
The spec score doesn’t measure how it works for you or durability, and the strong or weak point reading is just a comparison of numbers, not a buying recommendation.