Best Mass Gainer Powders in Australia

A mass gainer is a high-calorie shake that combines protein with a large dose of carbohydrate, and it suits people who struggle to eat enough food to gain weight. This page ranks the gainers Supps247 customers buy most, checks each against its brand label, and lines up calories, protein and serve size side by side, because they range from a 560-calorie shake to one that tops 2,000 calories. Updated October 2026.

Our top picks at a glance

1. MuscleTech Mass-Tech Extreme 2000: best for maximum calories

Mass-Tech Extreme 2000 is our best-selling gainer that we could verify, and it is built for people who need a very large calorie boost. A full serve is six scoops and more than 2,000 calories, so the label also lists a half serve, and you can split it across the day. Per calorie it is also one of the cheapest options on this page, which matters if you go through a lot of it.

• Full serve (6 scoops, 564 g) with water: 2,160 calories (9,010 kJ), 62 g protein, 452 g carbohydrate, 25 g sugars, 7 g fat (Australian label)
• Made with 500 mL skim milk instead of water: 2,340 calories and 80 g protein
• Half serve (3 scoops) with water: 1,080 calories and 31 g protein
• 3 g creatine monohydrate per full serve
• Contains milk and soy; may contain egg

Worth knowing: The 80 g protein figure on the tub only applies when you mix it with skim milk; with water a full serve gives 62 g. The first ingredient is a carbohydrate complex led by maltodextrin, and our 12 lb (5.44 kg) tub holds about 10 full serves.

View MuscleTech Mass-Tech Extreme 2000

2. R1 Clean Gainer: best lean gainer

R1 Clean Gainer suits people who want extra calories without a huge serve or a lot of sugar. Two heaping scoops give 560 calories with 30 g of protein from a mix of whey, milk protein isolate and micellar casein, and the carbohydrate blend includes quinoa, rice bran and oat fibre alongside maltodextrin. It is our best-selling lean gainer and a good fit if you only need a modest calorie top-up.

• 560 calories and 30 g protein per 149 g serve (Chocolate Fudge)
• 99 g carbohydrate with 9 g sugars (4 g added) and 4 g fibre
• 5 g fat from a lipid blend that includes MCT, flaxseed and avocado powders
• Protein from whey concentrate, whey isolate, milk protein isolate and micellar casein
• Sweetened with sucralose and stevia; contains milk and soy

Worth knowing: At 560 calories, hard gainers may need two serves or extra food to make a real difference. The 15-serve tub costs noticeably more per calorie than the 30-serve tub.

View R1 Clean Gainer

3. Optimum Nutrition Serious Mass: best all-round high-calorie gainer

Serious Mass is a well-known high-calorie gainer and sells steadily in both sizes we carry. A serve of about two heaping scoops gives 1,252 calories and 50 g of protein, with added vitamins and minerals, creatine and glutamine. The label suggests new users start with a one-scoop half serve, which makes it easy to scale the dose to your appetite.

• 1,252 calories, 50 g protein, 254 g carbohydrate, 20 g sugars and 4 g fat per 336 g serve (Vanilla, Australian label)
• 3 g creatine monohydrate and 1 g L-glutamine per serve
• Added vitamins and minerals, including 748 mg calcium and 220 mg magnesium per serve
• 8 serves per 2.72 kg tub; our 5.46 kg tub holds about 16

Worth knowing: Maltodextrin is the first ingredient, so most of the calories come from carbohydrate. It contains milk and soy and the sweeteners 950 and 955.

View Optimum Nutrition Serious Mass

4. Dymatize Super Mass Gainer: best tested high-calorie option

Super Mass Gainer sits alongside Serious Mass for calories and protein, and it is the high-calorie gainer on this list with a banned substance testing claim from its brand. A serve of two and a half cups gives 1,280 calories and 52 g of protein from a blend of five dairy proteins, including micellar casein. It is a good choice for people who want a big serve but also care about testing.

• 1,280 calories, 52 g protein, 245 g carbohydrate and 11 g fat per 335 g serve with water (Rich Chocolate)
• 21 g sugars per serve, including 12 g added sugars
• Protein from whey concentrate, milk protein isolate, whey isolate, whey hydrolysate and micellar casein
• 10.7 g BCAAs including 5.1 g leucine per serve, according to Dymatize
• Dymatize says it is banned substance tested

Worth knowing: It has the most fat of the high-calorie picks (11 g per serve), partly from a sunflower creamer. It also contains a small amount of creatine and a gum blend that includes carrageenan.

View Dymatize Super Mass Gainer

5. Optimum Nutrition Gold Standard Pro Gainer: best high-protein gainer

Pro Gainer is the pick for people who want more protein than carbohydrate-heavy gainers provide. One heaping scoop gives 650 calories with 60 g of protein, the highest protein share of any gainer here, and the label carries a banned substance tested mark. It suits leaner bulks and anyone who already eats plenty of carbohydrate but struggles to reach a protein target.

• 650 calories and 60 g protein per 165 g scoop (Double Chocolate)
• 81 g carbohydrate, 7 g sugars, 9 g fat and 5 g fibre per serve
• Protein from whey isolate, whey concentrate, calcium caseinate and hydrolysed whey
• 14 serves per 2.27 kg (5 lb) tub
• Banned substance tested, according to the label

Worth knowing: It is the most expensive gainer here per calorie, so it makes more sense if protein is your main goal. It contains milk and soy, and is sweetened with sucralose and acesulfame potassium.

View Optimum Nutrition Pro Gainer

6. Rival Nutrition Clean Gainer: best value lean gainer

Rival Clean Gainer has almost the same headline figures as R1 Clean Gainer: 560 calories, 30 g of protein and 99 g of carbohydrate per serve with just 4 g of added sugars. In the 12 lb size it is the cheapest gainer on this page per calorie, and Rival says it is Informed Choice certified, which makes it a practical lean gainer for athletes in tested sports.

• 560 calories, 30 g protein and 99 g carbohydrate per 2-scoop serve
• 4 g added sugars per serve
• Protein from whey, milk and micellar casein sources
• 15 serves per 5 lb tub, with a 12 lb option
• Informed Choice certified and tested for more than 250 WADA banned substances, according to Rival

Worth knowing: Like other lean gainers, 560 calories may not be enough on its own for hard gainers. Sales are lower than our other picks, so flavour and size availability can vary between stores.

View Rival Clean Gainer

How we chose

We ranked weight gainers by units sold at Supps247 stores and online over the last six months, combined sizes of the same product, and dropped products that are not gainers or that we could not check against a brand label. Label facts were checked against brand websites and label panels in October 2026. Because serve sizes range from 149 g to 564 g, value tiers use price per 1,000 calories at the time of writing rather than price per scoop: $ is cheaper than most picks on this page, $$ is in the middle and $$$ is premium. Brands do not pay for placement.

How to choose a mass gainer

Decide whether you need one. The AIS Sports Supplement Framework lists mixed macronutrient supplements, including powders and liquid meals, as Group A sports foods: a practical way to get nutrients in when regular meals are hard to fit in. If you can comfortably eat more food, food works just as well. Our bulking diet plan covers eating in a calorie surplus from meals.

Match the calories to your gap. The ISSN notes that athletes need enough energy to offset what they burn; to gain weight, your intake has to go beyond that. The gainers here range from 560 to 2,160 calories per serve, so pick one that closes your gap without replacing meals. Half serves are a sensible starting point for the larger formulas.

Check the protein. ISSN suggests 20 to 40 g of protein per serve and 1.4 to 2.0 g per kg of body weight a day for people who train. These gainers give 30 to 60 g per serve, so count that towards your daily total. Better Health Channel notes that training is what stimulates muscle growth and that protein beyond your needs is either excreted or stored as weight gain. If you mainly want more protein, see our protein powder picks.

Read the carbohydrate and sugar lines. Maltodextrin is the main carbohydrate in most gainers. Sugars range from 7 g to 21 g per serve on the labels we checked, so compare panels if you want to keep added sugar down.

Watch for hidden creatine. Serious Mass lists 3 g of creatine monohydrate per serve and Mass-Tech Extreme 3 g per full serve. The AIS describes 3 to 5 g a day as a maintenance dose, so factor this in if you already take creatine.

Water or milk. Some headline numbers assume milk. Mass-Tech Extreme gives 62 g of protein with water and 80 g with skim milk.

Tested athletes. If you are drug tested, choose batch-tested products (for example HASTA or Informed Sport certified) and check with your sport. Compare every option in our weight gainer collection.

FAQs

What is the difference between a mass gainer and protein powder?

A protein powder is mostly protein, with around 110 to 140 calories per scoop. A mass gainer adds a large amount of carbohydrate and some fat, so a serve ranges from 560 to more than 2,000 calories on this page. Choose a gainer if your main problem is eating enough total energy, and a protein powder if you only need to lift your protein intake.

How much mass gainer should I start with?

Start small and build up. Optimum Nutrition suggests new Serious Mass users begin with a one-scoop half serve, and Mass-Tech Extreme lists a three-scoop half serve alongside the full six scoops. Starting smaller lets you see how your appetite and body weight respond over a few weeks before you add more.

When should I drink a mass gainer?

Whenever it fits between your meals. Optimum Nutrition suggests Serious Mass after training and between meals, and Rival suggests Clean Gainer in the morning, after workouts, between meals or before bed. Spreading protein through the day also lines up with ISSN advice to have protein every 3 to 4 hours.

Will a mass gainer make me put on fat?

A gainer simply adds calories, so the result depends on your total intake and your training. Better Health Channel notes that training is what stimulates muscle growth and that extra protein beyond your needs is stored as weight gain or excreted. Pair a gainer with regular resistance training and adjust the serve if your weight climbs faster than you want.

Do mass gainers contain creatine?

Some do. On the labels we checked, Serious Mass lists 3 g of creatine monohydrate per serve, Mass-Tech Extreme lists 3 g per full serve and Super Mass Gainer contains a small amount. The AIS describes 3 to 5 g a day as a maintenance dose, so you may not need a separate creatine supplement on days you have a full serve.

Should I mix my gainer with water or milk?

Either works. Milk adds extra calories and protein, which helps if you are trying to gain: Mass-Tech Extreme goes from 2,160 calories and 62 g of protein with water to 2,340 calories and 80 g with skim milk. Water keeps the calories lower and is easier when you are on the go.

Sources: AIS Sports Supplement Framework: Group A; ISSN position stand: protein and exercise (2017); ISSN exercise and sports nutrition review update (2018); Better Health Channel: Protein; AIS Sports Supplement Framework fact sheet: Creatine.

Order online with Australia-wide delivery, free on orders of $100 or more, or visit a Supps247 store in Melbourne, regional Victoria or Brisbane to compare products in person before you buy. Members can use our price match guarantee on full-priced items.

Always read the label and follow the directions for use. If you have a medical condition, are pregnant or take regular medication, check with your doctor first.