Estimated delivery by Tue Nov 17 · +48 hrs for Black Friday
from 5 verified customers2 flavours available
Heavyweight Mass Gainer by International Protein
Price
$141.56
$176.95
$7.86 per serve 18 servesNutritional info
- 4 payments of $35.39*
- 4 payments of $35.39*
- From $23.59* a week
- Provides a high-calorie surplus for growth
- Supports prolonged muscle protein synthesis
- Sustains energy with complex carbs
- Supports overall vitality and immune health
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Add $8.44 and shipping is free
- Free gift when you spend $200
- Free postage on orders over $150
- East & west coast dispatch
- Easy returns within 30 days
Remy Hughes - Supplement MartVerified expert
Msc Sports Nutrition, Bsc Exercise Science
Reviewed June 2026
Good fit for
- Weight gain
- Hard gainers
- Lean muscle
Not for
- Dairy allergy or lactose intolerance
- Vegan diets
- Anyone cutting calories
About this product
- Free standard shippingFREEOrders $150 and over, anywhere in Australia.
- Standard$12.95Orders under $150. Tracked, from the warehouse closest to you.
- Express$19.95Australia Post express network, any order value.
- Express + Skip The Line$29.95Your order is picked and packed ahead of the queue, then sent express.
- Click & collectFREEReady in 4 hours at any of our 58 stores. No minimum.
- Australia Post parcel lockerSAME RATESHave it sent to a 24/7 parcel locker instead of your door and collect whenever suits. Choose a locker address at checkout; standard and express rates apply as above.
- Shipping insurance$1.99Optional freight protection, added in the cart.
- Eco bag$0.99A reusable Supplement Mart bag you can add to your order.
- Heavy RTD levy$20Cartons of ready-to-drink only. The $150 free threshold still applies to the rest of the order.
Black Friday volume means orders are taking a little longer to leave us than usual. The rates above are what you will see at checkout.
Unopened and unused, send it back within 30 days for a refund or a swap. Change of mind included. Sealed tubs only, for obvious reasons.
Not sure which one is right for you? Ask us in chat, or walk into any of our 58 stores across Australia. Our staff train, so you get an answer rather than a sales pitch.
INSIDE EVERY SERVE
Are you struggling to consume the amount of food required to see the gains you’re after? International Protein Heavyweight Mass Gainer makes it extremely easy to get those extra calories.
- 85gProtein Per Serve
- 18Serves Per Tub
- 1050Calories Per Serve
Sugars 33.7g per serveServing size 220g (6 scoops) with 500ml skim milkContains Milk. The per-serve column is measured with 500ml skim milk.
NUTRITION & INGREDIENTS
| Per serve | Qty | Per 100g |
|---|---|---|
| Energy | 4390kJ(1050Cal) | 1600kJ |
| Protein | 85g | 29g |
| Fat - Total | 5.8g | 2.4g |
| - Saturated | 3.5g | 1.3g |
| Carbohydrates - Total | 160g | 60g |
| - Sugars | 33.7g | 2.2g |
| Sodium | 440mg | 100mg |
| Calcium | 1060mg | 160mg |
| Vitamin A | 375ug | 170 mgug |
| Thiamine | 0.12mg | 0.05mg |
| Riboflavin | 1.13mg | 0.06mg |
| Niacin | 1mg | 0.45mg |
| Vitamin B6 | 0.16mg | 0.07mg |
| Vitamin B12 | 0.2ug | 0.09ug |
| Pantothenic Acid | 0.5mg | 0.2mg |
| Vitamin C | 4mg | 1.8mg |
| Vitamin D | 1ug | 0.45ug |
| Vitamin E | 1mg | 0.45mg |
| Biotin | 3ug | 1.4ug |
| Folate | 20ug | 9ug |
| Zinc | 1.2mg | 0.55mg |
| Iron | 1.2mg | 0.55mg |
Allergens
Contains Milk. The per-serve column is measured with 500ml skim milk.
| Per serve | Qty | Per 100g |
|---|---|---|
| Energy | 4390kJ(1050Cal) | 1600kJ |
| Protein | 85g | 29g |
| Fat - Total | 5.8g | 2.4g |
| - Saturated | 3.5g | 1.3g |
| Carbohydrates - Total | 160g | 60g |
| - Sugars | 33.7g | 2.2g |
| Sodium | 440mg | 100mg |
| Calcium | 1060mg | 160mg |
| Vitamin A | 375ug | 170 mgug |
| Thiamine | 0.12mg | 0.05mg |
| Riboflavin | 1.13mg | 0.06mg |
| Niacin | 1mg | 0.45mg |
| Vitamin B6 | 0.16mg | 0.07mg |
| Vitamin B12 | 0.2ug | 0.09ug |
| Pantothenic Acid | 0.5mg | 0.2mg |
| Vitamin C | 4mg | 1.8mg |
| Vitamin D | 1ug | 0.45ug |
| Vitamin E | 1mg | 0.45mg |
| Biotin | 3ug | 1.4ug |
| Folate | 20ug | 9ug |
| Zinc | 1.2mg | 0.55mg |
| Iron | 1.2mg | 0.55mg |
Allergens
Contains Milk. The per-serve column is measured with 500ml skim milk.
Disclaimer: Please note, while we try our best to keep up-to-date nutritional information available on the website, packaging and products can change, therefore this information should serve only as a guide. Please refer to actual packaging for latest information.
THE OTHER HALF OF YOUR STACK
For the days when getting started is the hard part.
For energy and workout performance
For high-intensity training
WHY IT WORKS
Are you struggling to consume the amount of food required to see the gains you’re after? International Protein Heavyweight Mass Gainer makes it extremely easy to get those extra calories.
- Works well for fast metabolisms
- A convenient way to boost daily calories
- Promotes sustainable weight and muscle gain
More about Heavyweight Mass Gainer
Are you struggling to consume the amount of food required to see the gains you’re after? International Protein Heavyweight Mass Gainer makes it extremely easy to get those extra calories. Its multi-phase protein release blend and unique grain matrix keep your body in a growth-friendly state for longer and supports the metabolisms to support maximum ideal weight gain. Packed with protein, MCT oils and omega fats, International Protein Heavyweight Mass Gainer has been specifically formulated to promote sustainable gains. Omega fats not only provide extra high energy calories, but they also assist in overall vitality and immune system health!
- Protein-rich & calorie-packed formula.
- For hard-gainers.
- Banned substance free.
International Protein Heavyweight Mass Gainer contains ModCarb, which is a combination of gluten-free oat bran, quinoa, amaranth, buckwheat, and millet. Together, these ingredients supply nutrition-rich complex carbohydrates and support even the fastest hard-gainer metabolism. To promote optimal muscle growth, Whey Protein Concentrate, Whey Protein Isolate, Calcium Caseinate and Whey Peptides have been added to this formula. This combination of proteins offers fast and slow release times to deliver a prolonged source of protein. International Protein Heavyweight Mass Gainer also contains free-form Glutamine, BCAAs and 12 essential vitamins & minerals that assist in muscle growth and recovery. With 1050 calories and 85g of protein per serve, this delicious weight gain supplement is the perfect formula for individuals that want try to stack on weight in their bulking season!
Nutritional Information
Directions of Use
- Mix 220g (6 scoops) with 400-500ml of skim milk. Consume either in the morning, between meals or post workout.
- Can be taken as two half serves during the day.
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5.0 / 5 from 5 reviews
Heavyweight Mass Gainer
A+++
Great taste
5 Stars
Great taste
Good Quality!
Best product I've tried so far. Affordable and tastes good. Really a good bulking agent
How do I take Heavyweight Mass Gainer?
Who is Heavyweight Mass Gainer for?
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