in 17 offers
The lowest price for Optimum Nutrition Serious Mass right now is $74.99 at Muscle & Strength, compared across 13 retailers.
The all-time low was $50.43 on 24 June 2026 — today's price is 49% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 9 Oct 2026.
Optimum Nutrition Serious Mass
Last updated at 09/10/2026 10:17:35
Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine Monohydrate and Glutamine, Vanilla, 4 Servings, 1.34kg,
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Optimum Nutrition Serious Mass - 6lbs Vanilla
Delivery $76.99
Optimum Nutrition Serious Mass Vanilla 2.72kg
Delivery between Mon – Tue $9.99
Serious Mass by Optimum Nutrition, 2.72kg | 8 Serves / Vanilla
Delivery between 15–22 Oct $9.95
Serious Mass Gainer by Optimum Nutrition 2.72kg (6lbs) Vanilla
Free delivery
Optimum Nutrition Serious Mass 6LB / Chocolate
Delivery $20
Optimum Nutrition Serious Mass 2,7kg Vanilla - Gainer
Free delivery
Optimum Nutrition Serious Mass 6lb / Chocolate
Delivery $9.95
ON Serious Mass Choc / 5.44kg
Delivery between 14–22 Oct $18.95
Optimum Nutrition Serious Mass | 1260 Cal 50g Protein Mass Gainer | Australian Muscle 12lb / Banana
Free delivery between 14–22 Oct
| Flavor | Vanilla, Banana, Chocolate, Chocolate Peanut Butter, Strawberry |
| Form | Powder |
| Protein Grams Per Serving | 50 g |
| Protein Type | Whey protein concentrate from milk |
| Meal Replacement? | May be used to supplement caloric intake |
Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine Monohydrate and Glutamine, Vanilla, 4 Servings, 1.34kg,
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Optimum Nutrition Serious Mass - 6lbs Vanilla
Delivery $76.99
Optimum Nutrition Serious Mass Vanilla 2.72kg
Delivery between Mon – Tue $9.99
Serious Mass by Optimum Nutrition, 2.72kg | 8 Serves / Vanilla
Delivery between 15–22 Oct $9.95
Serious Mass Gainer by Optimum Nutrition 2.72kg (6lbs) Vanilla
Free delivery
| Flavor | Vanilla, Banana, Chocolate, Chocolate Peanut Butter, Strawberry |
| Form | Powder |
| Protein Grams Per Serving | 50 g |
| Protein Type | Whey protein concentrate from milk |
| Meal Replacement? | May be used to supplement caloric intake |
