10 Best Muscle Gainer Supplements in 2026

Over 1,200 calories per two-scoop serving make this a straightforward tool for anyone struggling to eat enough for weight gain. That calorie density, paired with 50 grams of blended protein and a hefty 250-plus grams of carbs, means you’re getting a serious energy and recovery boost in one shake. The addition of creatine, glutamine, BCAAs, and over 20 vitamins and minerals rounds out the nutritional profile nicely, so you aren’t just adding empty calories. This is the kind of product that fits best when your daily diet needs a reliable push toward your bulking goals without a lot of fuss.

The 250-plus grams of carbs per serving can feel heavy if you’re not used to high-carb intakes or if you’re sensitive to blood sugar swings. Compared to Transparent Labs Mass Gainer, which offers 110 grams of carbs per serving, Serious Mass provides more than double that amount. For someone who wants a straightforward, calorie-dense mass gainer with added performance ingredients from a brand that markets itself as the world’s number one sports nutrition brand, this is a practical, no-surprises choice.

A single serving packs 52 grams of protein, which is a serious head start for anyone trying to build muscle without spending all day eating. That protein comes from both whey and casein, so you get a quick hit for recovery plus a slow release that keeps fueling your muscles for hours. It also sneaks in 1 gram of creatine and 10.7 grams of BCAAs per scoop, along with 14 vitamins and minerals, making this a fairly complete recovery shake in one glass. If your goal is straightforward mass gain and you want a formula that does more than just dump calories, this blend is designed to support both immediate repair and long-term growth.

The carb load here is 245 grams per serving. That is a lot to handle if you don’t have a huge appetite or a very active day ahead. The creatine dose is also modest at just one gram, so you might want to add more separately if you’re serious about strength. Still, if you want a protein-forward, nutrient-packed gainer that covers multiple recovery angles in one scoop, this is a smart, straightforward pick.

Sixty grams of protein per serving is the standout number here. That is more than most mass gainers pack into a single scoop, giving your muscles a serious dose of building blocks after a tough session. With 650 calories and over 80 grams of carbohydrates, this is designed for the person who struggles to eat enough throughout the day and wants a convenient way to tip the scale toward growth.

The sheer size of the tub, at over 10 pounds, is something to consider. It is not something you will toss in a gym bag, so plan to scoop at home. Compared to Optimum Nutrition Serious Mass, which includes creatine and glutamine, this Pro Gainer offers a different nutrient profile with 60g protein and over 80g carbs per serving. It is a fit if you want a high-protein gainer and are okay with the big container taking up pantry space.

With 770 calories and 53 grams of grass-fed whey per serving, this mass gainer delivers a high-calorie formula from sources like oat flour, tapioca maltodextrin, and sweet potato powder. The added 3 grams of creatine monohydrate provides a clinically dosed boost for strength and recovery. It’s free from artificial sweeteners, colors, and preservatives, and third-party testing with a Certificate of Analysis backs its purity. If you read ingredient labels and want a clean supplement, this one avoids mystery additives.

At 770 calories, this mass gainer packs a heavy caloric load that can be tough to finish in one sitting, especially if you’re not used to dense shakes. It delivers 53 grams of grass-fed whey protein and 3 grams of creatine monohydrate per scoop, which supports both muscle recovery and strength gains. If you prefer a cleaner ingredient profile, no artificial sweeteners, colors, or preservatives, this formula stands out among high-calorie options.

Fifty grams of protein and 1,250 calories per serving come from just three ingredients: Naked Whey, Naked Casein, and organic tapioca maltodextrin. That simplicity is the whole point. If you want a weight gainer that skips the artificial sweeteners, colors, and mystery fillers, this is your pick. The dual-protein blend combines fast-release whey with slow-digesting micellar casein, so you get steady amino acid support between meals. It’s also NSF Certified for purity and safety, meaning what’s on the label is what’s in the tub, no hidden surprises.

With 252 grams of carbs, this mass gainer is built for hard gainers who need a serious calorie surplus to pack on weight, not for anyone cutting carbs. Since it’s unflavored, you control the taste by blending in milk, fruit, or cocoa, ideal if you like customizing your shake. If you prefer a ready-to-drink flavor, Optimum Nutrition Serious Mass comes in chocolate.

A 6:1 carb-to-protein ratio means every serving packs over 250 grams of carbs alongside 40 grams of all-whey protein. So you get the fuel to refill glycogen stores and the building blocks for muscle repair in one shake. That ratio is notably carb-forward, which suits anyone who burns through energy fast during heavy lifting or high-intensity training and needs to tip the scale toward weight gain without guessing how much of each macronutrient they’re getting. The added creatine monohydrate rounds out the formula for anyone who wants a straightforward, no-fuss mass builder that leans on proven ingredients.

This gainer demands you pair it with a high-calorie diet and consistent training. It’s a supplement, not a shortcut, so if you’re not eating enough or skipping workouts, those calories will just sit there. It’s a clean, US-made option for anyone ready to commit to the full program of eating big and lifting heavy.

With 1,000-plus calories and 60 grams of protein in a single serving, this mass gainer is built for one job: packing on serious size when you’re training hard and eating big. The 180 grams of carbohydrates per serving are intended to crank insulin and push glycogen into your muscles, supporting recovery for your next workout. It also includes creatine and glutamine, so you’re getting extra recovery support without needing a separate tub. That makes it a straightforward option if your goal is bulking and you don’t mind a calorie-dense shake to get there.

This isn’t a subtle supplement. The carb load is high, which means it works best for people who are already eating high-calorie diets and training with serious volume. If you’re trying to add weight without a ton of carbs or you prefer a leaner gainer, this one will feel heavy. But for anyone who wants a high-protein, high-calorie shake that also includes creatine and glutamine, King Mass XL delivers on its stated specs.

If your stomach rebels against dairy-based mass gainers, this 100% beef protein isolate formula skips lactose, sugar, dairy, and gluten entirely. That makes it a practical choice for anyone who wants a straightforward weight gainer without the bloating or digestive issues that often come with whey or casein blends. The protein supports muscle mass, strength, and recovery, so you’re not sacrificing results for comfort.

For anyone who struggles with dairy or gluten, this weight gainer is built around 100% beef protein isolate, making it a stomach-friendly option that skips the usual whey-based formulas. The 6-pound container is roughly the same size as many competitors but noticeably heavier than Dymatize Super Mass Gainer’s 1.3-pound tub, so it’s less convenient to toss in a gym bag. Lifters who want to avoid lactose, sugar, and gluten while supporting muscle mass and recovery will find this a reliable fit.

With 53 grams of protein and just 6 grams of fat per serving, this mass gainer leans hard toward muscle-building without piling on extra grease. The blend of whey concentrate and micellar casein gives you both fast- and slow-digesting protein, so your muscles get a steady stream of amino acids for recovery and growth. That makes it a smart pick if you want to add lean mass rather than just bulk up with whatever calories you can find.

The carb count here is 99 grams per serving. That fuels your workouts but might feel like more than you need if you’re not training intensely or watching your sugar intake. If you’re serious about building muscle without mystery ingredients, this is a clean option that respects your goals.

With 36 servings and 560 calories per scoop, this 12-pound tub gives you a steady supply of quality calories to fuel workouts and support lean mass gains when paired with resistance training. The protein blend of whey, milk, and micellar casein provides a mix of fast and slow-digesting amino acids, while the carb source includes organic quinoa, oat flour, and maltodextrin. That thoughtful ingredient list, plus third-party testing for banned substances, makes it a smart pick for anyone who wants a bigger tub without sacrificing what goes inside.

With 99 grams of carbs per serving, this is a substantial amount. If your goal is strictly muscle gain with moderate carb intake, a gainer with a different carb-to-protein ratio might fit better. But if you need a calorie-dense gainer that lasts through a full month of training without running out, this Rival Nutrition tub delivers real value for the money.