Optimum Nutrition vs Dymatize: Which Whey Is Better?
Two of the best-known whey proteins. Here's how Gold Standard and ISO100 compare.
Protein Powders
1. Comparison
| Factor | ON Gold Standard 100% Whey | Dymatize ISO100 |
|---|---|---|
| Protein per scoop | About 24 g | About 25 g |
| Whey type | Blend of isolate, concentrate and peptides | Hydrolyzed whey isolate |
| Lactose | Low | Very low |
| Texture | Creamy | Lighter, thinner |
| Price per serving | Typically lower | Typically higher |
| Best for | Value and taste | Lactose sensitivity, lean diets |
2. Which Should You Choose?
- Gold Standard if you want a reliable, great-tasting whey at a good price
- ISO100 if you're lactose sensitive or want the leanest macros
- Check whether the specific product carries a third-party certification if you're a tested athlete
3. Taste and Flavor Range
Optimum Nutrition Gold Standard is known for a wide range of flavors and a creamy, dessert-like taste that mixes well with milk or water. Dymatize ISO100 is lighter and thinner because it's a hydrolyzed isolate, with flavors that many people find clean and easy to drink. Both brands offer popular chocolate and vanilla options, along with specialty flavors.
Flavor preferences are personal, so sample sizes are a good way to decide.
4. Mixability
Both powders mix easily in a shaker bottle. ISO100 dissolves very quickly and produces a thin shake, while Gold Standard creates a slightly thicker texture. Neither usually requires a blender.
5. Which Is Better for Weight Loss?
ISO100 has slightly fewer carbs and fats per serving, which may help people tracking calories closely. Gold Standard still provides plenty of protein for a reasonable number of calories.
6. Our Recommendation
Choose Gold Standard for value and creaminess, ISO100 for lactose sensitivity and lean macros.
7. Price and Value Comparison
Gold Standard is typically cheaper per serving and widely available, making it one of the most cost-effective popular wheys. ISO100 costs more because it's a hydrolyzed isolate, but some people value its lower lactose and lean macros. Compare cost per gram of protein during sales, as prices change frequently.
Both brands sell large containers that reduce cost per serving.
8. Third-Party Testing
Some products from both brands carry third-party certifications. Tested athletes should verify the specific product and batch on the certifier's website.
9. Which Is Better for Muscle Gain?
Both provide high-quality whey with plenty of leucine for muscle building. When total daily protein is matched, muscle gains are similar regardless of brand. Choose the one that fits your budget, taste preferences and digestion, and focus on consistent training and total protein intake.
Final Thoughts
In Optimum Nutrition vs Dymatize, Gold Standard wins on value and creamy taste, while ISO100 wins on purity and lactose tolerance. Both are trusted, popular choices. Formulas, certifications and prices change. Details here are typical at the time of writing; check each product's current label and verify certifications on the certifier's website. This article is for general information only and isn't medical advice. Talk to a doctor or registered dietitian before starting a supplement, especially if you're pregnant or nursing, take medication or have a health condition.
Frequently Asked Questions
- Is ISO100 better than Gold Standard?
- It's leaner and lower in lactose; Gold Standard is cheaper and creamier.
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