6 FREE C4 Cans Orders Over $100*
Days
Hours
Mins
Secs

Back to product overview

OPTIMUM NUTRITION SERIOUS MASS Reviews

4.65/5 based on 128 reviews
5 star
(101)
4 star
(22)
3 star
(3)
2 star
(0)
1 star
(2)

Overall Rating

9.3 /10

128 Ratings

Average Flavour Rating

9.5 /10

6 Flavours

Top Rated Flavour

10 /10

Chocolate

Write Review
5/5
Great taste. Excellent service always from Sprint Fit.
4/5
Good product does what it says
5/5
Awesome product, chocolate is the best
5/5
Great product. Would recommend and continue to purchase.
5/5
Good taste, does what it says
5/5
Works great
5/5
Good product. Great taste. Combined with wellbelly caps removed all side effects of discomfort
5/5
Love this protein, was gifted a full pack from a gym buddies, I've felt more gains, seen more definition in my muscles. The flavour is very tasty. I had no choice but to purchase again.
5/5
Love this protein powder. Gone through three so far, really yummy
5/5
Love this protein powder, affordable and effective with a super fast arrival :)
5/5
The product was really good and I have been taking it for a while now! Would recommend it!
5/5
Great stuff and putting on the weight. Easiest mixed with a shaker with the metal ball rather than a blender. Chocolate tastes great.
3.5/5
Great product, gets you through when you need to bulk cleanly
5/5
Damn awesome product that having recently and loving it. Also, the service is in top quality. Thanks guys
4.5/5
Product is always what you ordered, most impressed by customer service. Put in the wrong delivery address, emailed asking to change and by 6am the next morning had confirmed email change and shipped product without issues. Awesome
5/5
Exactly what I ordered and delivered fast. Good service
4.5/5
Do you like gains. Like the feeling of weights getting lighter. Then shut up and get mass gainer. Go big or....
5/5
I've tried a few different mass gainers and this has got to be my favorite. Great taste and mixes well. I only use half a serve a day which has about 600 calories, 25g protein and over 100g of carbs, which is a bit higher than some of the other mass gainers I have tried. This product also doesn't upset my sensitive stomach, which was an issue with some other mass gainers. Will be sticking to this one!
5/5
Tasty and healthy.
5/5
Awesome service with fast delivery and got 20% off discount as you guys celebrating the birthday. Thanks
4/5
Great product at a great price and sent quickly to me. Really recommend Sprint Fit for supplements.
4.5/5
Tastes great and works well
5/5
Awesome flavor, super tasty. Easy to mix or shake up with no clumps. Quality product, highly recommended
4/5
Good excellent product.
5/5
Awesome site very on time and free gift was worth it it’s price. Thanks a lot guys. Optimum Serious Mass is my go to.
.5/5
Bag come split open. I emailed about the issue and it was never resolved. very disappointed
5/5
This stuff is the best I've ever had. Tastes great, and mixes well. Highly recommend!
5/5
I think Optimum Nutrition Serious Mass protein is awesome n gain mean results with a solid workout plan and diet and also taste yum.
5/5
Nice product. Great taste. Highly recommend.
5/5
Awesome Product , Great Value, Fast shipping
5/5
Excellent service, fast delivery, great product, tastes good and blended well
5/5
Really good mass gainer, trust this brand 100% and it always helps me achieve the results I’m looking for while I’m in a bulking phase. Makes it a lot easier to bulk as there is a lot of calories in here which make my life easier while at work during the day. As I can substitute it as a meal.
5/5
Sprint Fit is really good to shop products because they are 100% original. I got on serious mass gainer. It's really good. Thanks Sprint Fit.
3.5/5
The scoop is huge. Easy to drink and tastes delicious. Great value for money and I've noticed the difference. Been using for a month now.
4.5/5
Tastes good, arrived quickly, well worth the money
5/5
Speedy delivery, great service arrived exactly as ordered, mixes easy with Sprint Fit hand shakers, I went with choc flavor mixed half with milk in one shaker the other half with water in Another and could not tell the difference in taste both were awesome (maybe a bit to good). Now for results, back in a couple of months to confirm if it works or not!

Instagram sprintfit

FIND OUT BEFORE ANYONE

Receive exclusive offers and news that will brighten up your day!

Sign up successful!