Best Protein Powders for Muscle Gain in 2025 

Before we get into the top picks, let's talk science. Muscle growth, or hypertrophy, happens when your body repairs and builds muscle fibers after resistance training. Protein provides the amino acids—like leucine—that kickstart muscle protein synthesis (MPS). Studies show that 20-30 grams of high-quality protein post-workout can maximize MPS, making protein powder a convenient, efficient way to hit that target.

But here's the catch: not all protein powders deliver the same results. Whey protein, derived from milk, is the gold standard for muscle gain due to its complete amino acid profile and fast digestion. That's why Myprotein's whey-based powders dominate this list. Ready to find your match? Let's break it down

Top Myprotein Powders for Muscle Growth

Myprotein has been a leader in sports nutrition for over 20 years, and their 2025 lineup is no exception. Here are the standout options for muscle gain, complete with pros, cons, and links to snag them

1. Impact Whey Protein: The Everyday Muscle Builder 

Impact Whey Protein is Myprotein's flagship product—and for good reason. This whey concentrate delivers up to 23 grams of protein per serving, with 2 grams of leucine to ignite muscle growth. It's affordable, versatile, and available in over 50 flavors, from Chocolate Smooth to Salted Caramel.

• Why It's Great for Muscle Gain: High protein content, budget-friendly (as low as $0.57 per serving), and a solid BCAA profile (4.5 grams per serving).
• Best For: Beginners or anyone wanting a reliable daily shake.
• Downsides: Contains some lactose, so it might not suit those with dairy sensitivities.
• How to Use: Mix 30 grams (one scoop) with 250ml of water or milk 30 minutes post-workout.

Pro Tip: Try the Vanilla flavor in your morning oats for a protein-packed breakfast!

2. Impact Whey Isolate: Pure Power for Lean Gains 

Impact Whey Isolate ups is for those chasing lean muscle. With 23 grams of protein per serving and 90% protein content, it's filtered to remove nearly all fat and carbs (zero fat, less than 1 gram of carbs). It's ideal if you're cutting or lactose intolerant.

• Why It's Great for Muscle Gain: Higher protein purity and faster absorption than concentrate.
• Best For: Advanced lifters or those on a calorie deficit.
• Downsides: Slightly pricier than Impact Whey.
• How to Use: Same as Impact Whey—30 grams post-workout or between meals.

Fun Fact: It's Informed Sport certified, so it's trusted by pros

3. Clear Whey Isolate 

Clear Whey Isolate is a game-changer if thick, milky shakes aren't your vibe, . This hydrolyzed whey isolate mixes into a juice-like drink, packing 20 grams of protein per serving. Flavors like Peach Tea and Mojito make it a refreshing post-gym treat.

• Why It's Great for Muscle Gain: Fast-absorbing hydrolyzed whey delivers amino acids quickly to your muscles.
• Best For: Hot days or anyone bored of traditional shakes.
• Downsides: Slightly less protein (20g) than Impact Whey options.
• How to Use: Mix 25 grams with 300ml of water and sip after training.

Try This: The Cranberry & Raspberry flavor is a fan favorite for summer sessions.

Impact Whey vs. Clear Whey: Which Is Best for Muscle Gain? 

Confused about which Myprotein powder to pick? Here's a head-to-head comparison:

Choose Impact Whey if you want a cost-effective, high-protein option for daily use or bulking

Choose Clear Whey if you prefer a lighter texture or need a low-calorie option for cutting.

Both are winners for muscle gain, but your goals and taste buds will decide.