Comparing categories as well as this product? Visit our top mass gainer roundup or browse the muscle gain hub for broader buying advice and related picks.
At a glance
A quick summary for readers who want the shape of the product before reading the full review.
- Protein type
- Mass gainer blend
- Best suited for
- High-calorie bulking support
- Format
- Large-serving powder shake
- Key consideration
- Designed around calorie intake as much as protein intake
Quick verdict
Serious Mass is one of the best‑known weight‑gainer shakes. Each two‑scoop serving delivers 1,250 calories, 50 g of protein and over 250 g of carbohydrates. It’s designed for those struggling to eat enough calories daily.
How we review
At Protein Pitstop, our reviews are based on editorial research — not product trials. We assess:
- Label and ingredient information
- Customer feedback and Amazon reviews
- Brand transparency and certifications
- Suitability for different dietary needs
We do not accept free products or sponsorships, and affiliate links don’t influence our results.
Ingredient snapshot
Before looking at the finer detail, these are the headline formula characteristics worth knowing.
- Mass gainer blend with carbohydrate-heavy positioning
- Built for users who struggle to get enough calories from food alone
- More relevant to bulking routines than general everyday protein use
Nutrition & ingredients
A serving combines whey concentrate, casein and egg albumen with a carbohydrate blend of maltodextrin and glucose polymers. It also includes added vitamins, minerals, creatine and glutamine. The formula is high in sugar (around 20 g per serving) and contains lactose.
Taste & mixability
Customer reviews describe Serious Mass as sweet and dessert‑like, with Chocolate and Banana popular flavours. Because servings are large, mixing is easier with a blender. Users often split servings across the day for easier digestion.
Use cases
Serious Mass is marketed for “hard gainers” — people struggling to eat enough calories daily. Customer feedback highlights convenience and the calorie load as key benefits, but some mention digestive discomfort. Because servings are large, users often split a serving across the day for easier digestion.
Value
Serious Mass is positioned as cost‑efficient calories in liquid form. Not everyone needs this density; those wanting just protein should consider standard whey.
Pros & cons
Pros
- 1 250 calories per serving with 50 g protein
- Includes vitamins, minerals, creatine and glutamine
- Convenient for high calorie intake
Cons
- Very high sugar content
- Large serving sizes are hard to digest for some
- Not suitable for lactose‑intolerant users
Who this protein may suit
May suit:
- People intentionally trying to raise daily calorie intake
- Hard gainers comparing mass gainer products
- Users who want a more convenient bulking shake format
May not suit:
- Anyone looking for a lean everyday protein powder
- People following lower-calorie or low-sugar plans
- Users who prefer simpler whey-only formulas
How it compares
Serious Mass sits in the calorie-dense gainer category rather than the standard whey category, so the most useful comparisons are with other bulking products and muscle-gain hubs.
For broader context, compare it within our top mass gainer roundup and then browse the muscle gain hub.
FAQs
Can I use Serious Mass if I’m lactose‑intolerant?
No. Serious Mass contains whey concentrate and casein, both of which contain lactose. Lactose‑intolerant individuals should choose a dairy‑free gainer or blend their own.
Is Serious Mass healthy?
It can be part of a healthy bulking plan when used appropriately, but it’s high in sugar and should not replace balanced meals. Consider your overall diet and consult a nutritionist if unsure.
How do I mix Serious Mass?
Follow the mixing directions on the product label. Many users find a blender helpful for larger servings and prefer splitting a full serving into multiple shakes if needed.
Can women use Serious Mass?
Yes, but women typically require fewer calories than men. Adjust the serving size to your needs and monitor your caloric intake to avoid excessive weight gain.
Does Serious Mass contain creatine?
Yes, it contains a small amount of creatine monohydrate. If you’re taking additional creatine, factor this into your total daily intake.