AMP Mass XXX with MyoTor
GNC AMP AMP Mass XXX with MyoTor is a mass gainer protein powder with 50 g of protein per About 4 scoops (208 g). It scores 44/100 on the TBPP Quality Score. It is Informed Choice.
Nutrition per serving
Chocolate flavor, from the label.
| Serving size | About 4 scoops (208 g) |
|---|---|
| Protein | 50 g |
| Calories | 770 |
| Carbohydrates | 127 g |
| Sugar | 8 g |
| Fat | 6 g |
| Sodium | 580 mg |
| Protein by weight | 24% |
| Leucine | Not verified |
| BCAAs | Not verified |
How it scored
44 of 100 points. How we score
| Criterion | Points | Why |
|---|---|---|
| Protein density | 6 / 30 | 24% of each scoop is protein |
| Third-party testing | 15 / 25 | Independently tested for contaminants or label accuracy |
| Label transparency | 10 / 20 | adds free amino acids that inflate the protein number |
| Sugar | 2 / 10 | 8 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, Micellar Casein, Milk Protein Isolate |
| Third-party testing | Informed Choice |
| Sweeteners | Sucralose, Steviol Glycosides |
| Proprietary blend | No |
| Added free amino acids | Yes |
| Dietary | Gluten-Free |
| Allergens | Milk |
| Made by | GNC AMP (GNC Holdings) · USA |
| Sold at | GNC |
Price
$99.99 for 13 servings. About $7.69 per serving, or $3.85 per 25 g of protein.
Sizes: 13 servings (about 6 lb)
Flavors (4)
- Chocolate
- Vanilla
- Strawberry
- Cookies and Cream
Sources
- https://www.gnc.com/mass-gainers/379984.html
- https://www.gnc.com/search?q=mass%20xxx
- https://api.ods.od.nih.gov/dsld/v9/label/260081
- https://api.ods.od.nih.gov/dsld/v9/label/264829
Nutrition from the Chocolate 13-serving label text on GNC.com item 379984 (2026-10-14): about 4 scoops 208 g, 13 servings, 770 kcal, 6 g fat, 127 g carbs, 8 g total sugars (4 g added), 580 mg sodium, 50 g protein; adds 3 g creatine monohydrate, 2.5 g BetaPower betaine, 650 mg MyoTOR and a 500 mg creatine precursor blend of L-arginine, glycine and L-methionine (hence added_amino_acids). Ingredients: maltodextrin, whey protein concentrate, micellar casein, cocoa, milk protein isolate, natural and artificial flavors, MCT, salt, sucralose, sunflower lecithin, gums, steviol glycosides; Contains: milk. All four flavors $99.99 for 13 servings on GNC.com (schema.org offers). Informed Choice per the GNC.com page footnote. Gluten-free per GNC highlights. Leucine and BCAAs not stated. DSLD 260081 (Chocolate, 2021) shows an older 210 g / 780 kcal formula, used only for the variants note.
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.