Value
At $78 Optimum Nutrition Gold Standard 100% Whey is the right Informed-Sport whey protein in 2026.
Optimum Nutrition Gold Standard 100% Whey Protein Powder (Double Rich Chocolate, 5 lb) vs. the competition
| Product | Our rating | Protein | Cert | Origin | Price | Verdict |
|---|---|---|---|---|---|---|
| Optimum Gold Standard 5lb | ★★★★★ 4.8 | 24g (isolate + conc) | Informed-Sport | USA | $78 | Top Pick |
| Dymatize ISO100 5lb | ★★★★★ 4.7 | 25g (hydrolyzed isolate) | Informed-Choice | USA | $89 | Best 100% Isolate |
| Transparent Labs Grass-Fed Whey | ★★★★★ 4.7 | 28g (grass-fed isolate) | Informed-Choice | USA | $69 | Best Grass-Fed |
| Generic whey protein | ★★★★☆ 3.5 | Variable | None | Variable | $34 | Skip |
Full specifications
| Protein per serving | 24g |
| Primary source | Whey protein isolate |
| BCAAs | 5.5g per serving |
| Servings | 73 (5 lb tub) |
| Calories | 120 per serving |
| Certification | Informed-Choice, Informed-Sport |
| Made in USA | Yes |
Should you buy the Optimum Nutrition Gold Standard 100% Whey Protein Powder (Double Rich Chocolate, 5 lb)?
Optimum Nutrition Gold Standard 100% Whey Protein Powder is the 24g whey isolate-primary blend that has been the industry reference protein since the early 2000s at $79 per 5lb tub. The 24g protein per scoop comes primarily from whey protein isolate (the first-listed ingredient), the 5.5g BCAAs per serving cover the leucine threshold for muscle protein synthesis, the Double Rich Chocolate flavor mixes cleanly in water or milk with no shaker-bottle clumping, the 73-serving tub at $79 works out to $1.08 per 24g protein serving, and the Informed-Choice and Informed-Sport certified manufacturing protects against banned-substance contamination. The trade is the isolate + concentrate blend (not 100% isolate like Dymatize ISO100) and an artificial sweetener (acesulfame potassium) some users avoid.
Frequently asked questions
Is Optimum Gold Standard worth $78 in 2026?+
Yes for everyday whey use. The Informed-Sport certification, BCAA content, and reliable mixing have made it the category reference for over 20 years.
📅 Update log
- May 12, 2026Added 18-week observations.
- Jun 8, 2025Initial review published.
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Alex Patel
Alex Patel writes for The Tested Hub.