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The Best Protein Powders of 2025
Highlighting top choices like Optimum Nutrition Gold Standard Whey, Naked Whey, and Transparent Labs Grass-Fed Whey Isolate. It provides insights into selecting the right protein powder based on dietary needs, fitness goals, and ingredient preferences.
Protein powders have become a staple in many fitness and wellness routines, offering a convenient way to boost protein intake for muscle growth, recovery, weight management, and overall health. With countless options available — from whey and casein to plant-based blends — finding the right protein powder depends on your dietary preferences, fitness goals, and personal taste.
We evaluated top protein powders based on ingredient quality, taste, mixability, brand transparency, and third-party testing. Below, we share our top picks, discuss how we made our choices, and help you find the perfect powder to fuel your active lifestyle.
Summary of recommendations
- Best overall whey: Optimum Nutrition Gold Standard Whey
- Best grass-fed whey: Naked Whey
- Best casein blend: Kaged Muscle Kasein
- Best egg white protein: NOW Sports Egg White Protein
- Best for added functional ingredients: Transparent Labs 100% Grass-Fed Whey Isolate
Optimum Nutrition Gold Standard Whey offers 24g of premium whey protein per serving, with fast absorption for optimal muscle recovery and growth.
With a low-fat, low-sugar formula and essential amino acids, it supports post-workout recovery and performance. Easy to mix and available in various flavors, it’s perfect for fitness enthusiasts.
Feel free to jump directly to our picks or read on to learn more about our evaluation criteria.
How we evaluated the best protein powders
To determine which protein powders stand out, we considered several important factors:
- Protein source quality: We looked for high-quality proteins with minimal additives. For whey, we favored grass-fed or cold-processed options. For other proteins, we valued organic or responsibly sourced ingredients.
- Ingredient transparency and purity: Clear labeling, third-party testing (such as NSF Certified for Sport or Informed Choice), and no artificial sweeteners or fillers earned extra points.
- Taste and texture: A protein powder should be enjoyable and mix easily, with minimal grit. We considered user feedback and our own tests.
- Brand reputation: Established companies with positive reviews, reliable customer service, and good manufacturing practices (GMP) made the cut.
Our top pick for 2025:
Optimum Nutrition Gold Standard Whey
Why we chose Optimum Nutrition Gold Standard Whey:
Optimum Nutrition’s Gold Standard has set the bar in the whey protein category for years. While not the absolute cleanest option, it consistently delivers quality, taste, and value. With extensive flavor options and a solid track record, it remains the go-to for many athletes and gym-goers looking to support muscle growth and recovery.
Pricing: Around $30-$40 for a 2-pound container.
Who should use Optimum Nutrition Gold Standard Whey:
Beginners, experienced lifters, and anyone seeking a reliable, tasty whey protein at a reasonable price.
Best grass-fed whey:
Naked Whey
Why we chose Naked Whey:
Naked Whey prides itself on transparency and simplicity. With a single ingredient — grass-fed whey concentrate — it’s one of the purest options on the market. While it lacks fancy flavors, this purity appeals to health-conscious users who prefer controlling their sweeteners and additives. The result is a wholesome protein powder that supports muscle growth without unnecessary extras.
Pricing: About $90 for a 5-pound tub (unflavored).
Who should use Naked Whey:
Those who value simple, clean ingredients and are willing to pay a premium for grass-fed, minimally processed whey.
Best casein blend: Kaged Muscle Kasein
Why we chose Kaged Muscle Kasein:
Casein is ideal for bedtime or extended fasting periods since it digests slowly, providing a steady release of amino acids. Kaged Muscle’s micellar casein stands out for its quality, flavor, and thorough testing. Athletes and serious lifters appreciate the brand’s dedication to purity and effectiveness, making it a top pick for improving muscle recovery during sleep.
Pricing: Approximately $40-$50 for a 2-pound container.
Who should use Kaged Muscle Kasein:
Anyone who wants a high-quality, slow-release protein to support muscle repair and growth overnight or between meals.
Best egg white protein: NOW Sports Egg White Protein
Why we chose NOW Sports Egg White Protein:
Egg white protein is an excellent alternative for those avoiding dairy. NOW Sports offers a clean, pure egg white protein powder tested for purity and potency. With minimal additives, it’s versatile for smoothies, baking, or adding to other recipes. The Informed Sport certification provides extra assurance for athletes concerned about banned substances.
Pricing: About $25-$35 for a 1.5-pound container.
Who should use NOW Sports Egg White Protein:
Individuals with dairy sensitivities or those seeking a high-quality, allergen-friendly protein source that’s still rich in essential amino acids.
Best for added functional ingredients:
Transparent Labs 100% Grass-Fed Whey Isolate
Why we chose Transparent Labs 100% Grass-Fed Whey Isolate:
Transparent Labs lives up to its name by listing every ingredient and focusing on quality sourcing. Grass-fed whey isolate ensures a cleaner protein source, and optional flavors with added probiotics or enzymes support better digestion and overall gut health. It’s a premium product designed for those who want more than just protein from their shakes.
Pricing: About $59 for a 30-serving bag.
Who should use Transparent Labs 100% Grass-Fed Whey Isolate:
Health enthusiasts and athletes who prioritize ultra-clean ingredients and appreciate extras like probiotics, even if it means paying more.
Is protein powder right for you?
Protein powders aren’t just for bodybuilders. They can help anyone struggling to meet their protein needs through whole foods alone. Whether your goal is muscle growth, weight management, or maintaining lean mass as you age, a high-quality protein powder can offer convenience and versatility.
However, they’re supplements, not meal replacements. Whole foods still provide essential micronutrients and fiber. Use protein powders to complement a balanced diet and support your overall nutrition strategy.
Frequently asked questions about protein powders
Do I need protein powder if I already eat enough protein?
If you consistently hit your daily protein targets through whole foods, you may not need a protein supplement. But protein powders can still add convenience, especially post-workout or during busy periods.
What’s the difference between whey concentrate and isolate?
Whey concentrate typically contains more carbs and fats, while whey isolate undergoes extra filtration to reduce these components and increase protein purity. Isolate is usually more expensive but may be easier to digest for lactose-sensitive individuals.
Can I bake with protein powder?
Yes. Many protein powders can be added to recipes like pancakes, muffins, or energy balls. Just be mindful that cooking can alter texture and flavor, so start with small amounts.
The bottom line
Protein powder selection hinges on factors like dietary restrictions, flavor preferences, and desired purity. Optimum Nutrition Gold Standard Whey remains a classic all-around choice, while Naked Whey and Transparent Labs cater to those seeking cleaner, grass-fed sources. Kaged Muscle Kasein supports extended amino release, and NOW Sports Egg White provides a non-dairy alternative.
Whichever you choose, pair it with a balanced diet, regular exercise, and proper rest to maximize the benefits of this convenient, protein-packed addition to your routine.
