Mass Gainer
Rule 1 Mass Gainer is a mass gainer protein powder with 40 g of protein per 2 heaping scoops (325 g). It scores 54/100 on the TBPP Quality Score. It is Informed Choice and Informed Protein.
Nutrition per serving
Vanilla Creme flavor, from the label.
| Serving size | 2 heaping scoops (325 g) |
|---|---|
| Protein | 40 g |
| Calories | 1240 |
| Carbohydrates | 256 g |
| Sugar | 14 g |
| Fat | 6 g |
| Sodium | 520 mg |
| Protein by weight | 12% |
| Leucine | Not verified |
| BCAAs | 9 g |
How it scored
54 of 100 points. How we score
| Criterion | Points | Why |
|---|---|---|
| Protein density | 6 / 30 | 12% of each scoop is protein |
| Third-party testing | 15 / 25 | Independently tested for contaminants or label accuracy |
| Label transparency | 20 / 20 | Fully disclosed formula, no amino spiking |
| Sugar | 2 / 10 | 14 g sugar per serving |
| Ingredient simplicity | 6 / 10 | Mix of natural and artificial flavors or sweeteners |
| Verified label data | 5 / 5 | 7 of 7 label values verified |
Formula and label
| Type | Mass Gainer |
|---|---|
| Protein sources | Whey Protein Concentrate, Whey Protein Isolate, Whey Protein Hydrolysate |
| Third-party testing | Informed Choice, Informed Protein |
| Sweeteners | Sucralose, Acesulfame Potassium, Stevia Leaf Extract |
| Proprietary blend | No |
| Added free amino acids | No |
| Dietary | None listed |
| Allergens | Milk, Soy |
| Made by | Rule 1 |
| Sold at | ruleoneproteins.com |
Price
$44.99–$69.99 for 8 servings (5.73 lb). About $5.62 per serving, or $3.51 per 25 g of protein.
Sizes: 8 servings (5.73 lb), 16 servings
Flavors (7)
- Vanilla Creme
- Chocolate Fudge
- Strawberries & Creme
- Cookies & Creme
- Chocolate Peanut Butter
- Banana Creme
- Salted Caramel
Sources
- https://ruleoneproteins.com/products/mass-gainer
- https://ruleoneproteins.com/products.json?limit=250
- https://www.ruleoneproteins.com/cdn/shop/files/MassGainer-NutritionPanels-Vanilla.png?v=8808474023322081844
- https://cdn.shopify.com/s/files/1/0052/6657/1334/files/mass_5lb_vanilla-creme0001.png?v=1787246920
The brand's current R1 gainer sold as 'Mass Gainer' (the R1 LBS successor). Nutrition, ingredients and allergens come from the brand's Vanilla Crème Supplement Facts panel: 2 heaping scoops (325 g), 1240 kcal, 6 g fat, 256 g carbs (2 g fiber, 14 g sugars, 9 g added), 40 g protein, 520 mg sodium and 1 g creatine monohydrate. The ingredients list carbohydrate and protein blends that are fully disclosed, with no proprietary blend amounts. Added creatine is not an amino acid, so added_amino_acids is false. bcaa_g is the brand's '9g naturally occurring BCAAs' page claim. The brand page states 'Informed Choice Certified'. The front-of-tub image on the brand site shows Informed Choice and Informed Protein ('Protein Tested & Verified') badges. The Informed Choice certifier directory returned 403 and could not be cross-checked. Flavors and prices ($44.99 for 8 servings, $69.99 for 16 servings) come from the brand store, 2026-10-14. The 8-serving tub is 91.7 oz / 5.73 lb per the front label, and the 16-serving weight was not verified. Rule 1's separate 'Clean Gainer' (560 kcal per serving) is a different formula and is not covered by this record.
Good to know
Last checked 2026-10-14. Labels change, so check the package before buying if you have allergies. If you are pregnant, nursing or buying for a child, ask your doctor before adding a supplement.