Rule 1 Mass Gainer
Price
$155.90
RRP
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Description
Rule 1 Mass Gainer is a high-calorie powder built on a roughly 6:1 carbohydrate-to-protein ratio, designed for people who struggle to eat enough to gain weight. Each serve is two heaping scoops, 325 g of powder, giving 40 g of protein from a three-way whey blend plus 1 g of creatine monohydrate. It comes as the 16 serve tub, about 5.2 kg, in five flavours: Chocolate Fudge, Chocolate Peanut Butter, Cookies and Creme, Strawberries and Creme and Vanilla Creme.
Product Strengths
- Drunk between meals or after training, when eating more solid food is not realistic.
- 40 g of protein per serve from whey concentrate, isolate and hydrolysate.
- Roughly a 6:1 carbohydrate-to-protein ratio for a very high calorie load per shake.
- 1 g of creatine monohydrate built into every serve.
- Carbohydrate blend of maltodextrin, organic rice bran and Carb10® pea starch.
- 16 serves per tub, about 5.2 kg of powder.
Suitable For / Not Suitable For
Suitable for: Active adults and athletes.
Not suitable for: Anyone with an allergy to the listed ingredients; Pregnant or breastfeeding women, unless advised by a health professional; Vegans, because it contains a dairy ingredient; Anyone avoiding soy.
Ingredients
| Each serve (2 heaping scoops, 325 g) contains | Amount |
|---|---|
| Protein | 40 g |
| Total sugars | 14 g |
| Creatine monohydrate | 1 g |
Energy, fat, cholesterol, total carbohydrate, fibre, sodium, potassium, calcium and iron differ from flavour to flavour; for example the manufacturer's panels give 1260 calories and 254 g of carbohydrate for Chocolate Fudge against 1240 calories and 256 g for Vanilla Creme, so check the panel on the tub you have.
Ingredients: carbohydrate blend (maltodextrin, organic rice bran, pea starch as Carb10®), protein blend (whey protein concentrate, whey protein isolate, whey protein hydrolysate), cocoa processed with alkali in the chocolate flavours, natural and artificial flavours, guar gum, sucralose, acesulfame potassium, stevia leaf extract, soy lecithin and sunflower lecithin.
Allergens
Contains milk and soy. Always review label for full list of ingredients.
Suggested Use
Mix two heaping scoops with water or milk. Confirm serving and directions from product label.
Storage
Store in a cool, dry place out of direct sunlight and reseal the tub after use.
Disclaimer
Formulated supplementary sports food. This product is not a sole source of nutrition and should be consumed in conjunction with a nutritious diet and an appropriate physical training or exercise programme. Not suitable for children under 15 years of age or pregnant women; it should be used only under medical or dietetic supervision. Always read the label and follow the directions for use.
ingredients
suggested dose
OR
Mix in a blender, add your favorite fruit, a tablespoon of peanut or tree nut butter, and ice to the above, mix, and enjoy a protein-fortified smoothie! Calorie-Dense Suggested Mix In a blender, add one (1) serving of R1 Mass Gainer, 20-24 oz. of whole milk, and two (2) scoops of ice cream. Blend and enjoy a protein-fortified shake!
Rule 1 Mass Gainer is a high-calorie powder built on a roughly 6:1 carbohydrate-to-protein ratio, designed for people who struggle to eat enough to gain weight. Each serve is two heaping scoops, 325 g of powder, giving 40 g of protein from a three-way whey blend plus 1 g of creatine monohydrate. It comes as the 16 serve tub, about 5.2 kg, in five flavours: Chocolate Fudge, Chocolate Peanut Butter, Cookies and Creme, Strawberries and Creme and Vanilla Creme.
Product Strengths
- Drunk between meals or after training, when eating more solid food is not realistic.
- 40 g of protein per serve from whey concentrate, isolate and hydrolysate.
- Roughly a 6:1 carbohydrate-to-protein ratio for a very high calorie load per shake.
- 1 g of creatine monohydrate built into every serve.
- Carbohydrate blend of maltodextrin, organic rice bran and Carb10® pea starch.
- 16 serves per tub, about 5.2 kg of powder.
Suitable For / Not Suitable For
Suitable for: Active adults and athletes.
Not suitable for: Anyone with an allergy to the listed ingredients; Pregnant or breastfeeding women, unless advised by a health professional; Vegans, because it contains a dairy ingredient; Anyone avoiding soy.
Ingredients
| Each serve (2 heaping scoops, 325 g) contains | Amount |
|---|---|
| Protein | 40 g |
| Total sugars | 14 g |
| Creatine monohydrate | 1 g |
Energy, fat, cholesterol, total carbohydrate, fibre, sodium, potassium, calcium and iron differ from flavour to flavour; for example the manufacturer's panels give 1260 calories and 254 g of carbohydrate for Chocolate Fudge against 1240 calories and 256 g for Vanilla Creme, so check the panel on the tub you have.
Ingredients: carbohydrate blend (maltodextrin, organic rice bran, pea starch as Carb10®), protein blend (whey protein concentrate, whey protein isolate, whey protein hydrolysate), cocoa processed with alkali in the chocolate flavours, natural and artificial flavours, guar gum, sucralose, acesulfame potassium, stevia leaf extract, soy lecithin and sunflower lecithin.
Allergens
Contains milk and soy. Always review label for full list of ingredients.
Suggested Use
Mix two heaping scoops with water or milk. Confirm serving and directions from product label.
Storage
Store in a cool, dry place out of direct sunlight and reseal the tub after use.
Disclaimer
Formulated supplementary sports food. This product is not a sole source of nutrition and should be consumed in conjunction with a nutritious diet and an appropriate physical training or exercise programme. Not suitable for children under 15 years of age or pregnant women; it should be used only under medical or dietetic supervision. Always read the label and follow the directions for use.
OR
Mix in a blender, add your favorite fruit, a tablespoon of peanut or tree nut butter, and ice to the above, mix, and enjoy a protein-fortified smoothie! Calorie-Dense Suggested Mix In a blender, add one (1) serving of R1 Mass Gainer, 20-24 oz. of whole milk, and two (2) scoops of ice cream. Blend and enjoy a protein-fortified shake!
Weight Gainers
Extra calories and protein in one scoop.
Building size takes more protein and calories than most people can eat in a day. A weight gainer packs both into one shake, so you're not cooking three extra meals to hit your numbers.
Christina HanleyBHSc (Nutritional Medicine), Health Content Lead
Checked this page October 2026
See what we checked
Is Weight Gainers right for you?
Common questions
Will a weight gainer just make me fat, not muscly?
It can, if your training doesn't match the extra calories. In a trial of elite athletes, the group on a bigger calorie surplus gained more total weight than the group on a moderate surplus, but most of the extra was fat: 15% more body fat compared with 3%, with no real difference in lean mass between the two groups. The extra calories only build muscle if your training gives your body a reason to use them.
Is a weight gainer a medicine or a food?
It's a food. Most weight gainers are regulated under the Food Standards Code as a formulated supplementary sports food, not a therapeutic good, and the label has to say so. It also has to carry a warning that it isn't suitable for anyone under 15 or for pregnant women.
How much, and when
Food sources
The evidence, and its limits
The Australian rules
Not sure this is the right form for you? Ask one of our naturopaths. It is free and takes 10 minutes.
Always read the label and follow the directions for use. General information only, and not a substitute for advice from your doctor or one of our naturopaths.