💥 Bulk up boldly with Serious Mass — your ultimate muscle fuel!
CARB POWERED GAINS - Each serving packs 50g of carbs to supercharge your muscle recovery and growth.
MASSIVE 5 4 KG SUPPLY - Stay fueled for weeks with this jumbo 5455g container—no mid-month runs needed.
VANILLA VELVET FLAVOR - Indulge in a smooth, classic vanilla taste that makes every shake a treat.
UNISEX ADULT FOCUSED - Formulated for adult men and women aiming for serious mass gains.
PHYSICIAN APPROVED SAFETY - Clear usage guidelines ensure you stay on track without compromising health.
ON Serious Mass バニラ 5455g is a high-calorie mass gainer supplement designed for adults seeking significant muscle growth. Featuring 50g of carbs per serving and a smooth vanilla flavor, it comes in a large 5.4kg container to support sustained nutritional needs. Suitable for both men and women, it includes clear usage instructions to ensure safe consumption.
Specifications
Product Dimensions
29.21 x 13.97 x 40.64 cm; 5.44 kg
Target Age Range Description
大人
Target Gender
Unisex
Have a Question? See What Others Asked
How well does this work? I'm a teen with a high matabalizum and I'm looking to build mass and bulk up
banana
Does it work without work out ?because im so busy all day
will a high intensity sport like basketball plus weight training, 5 days a week lessen the effectiveness of this product??
Reviews
4.4
All from verified purchases
T**.
Fast working
Super working supliment
I**K
まずい
後悔
A**ー
Price
Good for skinny guys because of high calorieBad because I buy this item 3 times and I paid everytime more money then previous
ビ**ュ
袋のチャック部分が機能せず
ON Serious Mass を何度も購入しています。今回、初めてチャック部らしき物はパッと見た感じはあるのですが何か物が付いてるだけで全く機能しない状態でした。動きません。閉める開けるが大変でした。5.4kのを購入するのを諦めるしかありません。写真に撮っておけばよかった。プロテインは全く問題なし。チャックの問題が大きかったので☆2としました。
Common Questions
Trustpilot
TrustScore 4.5 | 7,300+ reviews
Ali H.
Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.
1 day ago
Rajesh P.
Customer service was outstanding when I had questions about the product.
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I'm a teen with a high matabalizum and I'm looking to build mass and bulk up","acceptedAnswer":{"@type":"Answer","text":"I’m nearly 50 years old, but seeing this question I had to comment. Until I was around 32 or so, I couldn’t gain weight no matter how much I had to eat; or so it seemed.\n\nI remember not caring whether it was fat or ideally muscle, I just didn’t want to be skinny anymore.\n\nThen I hit a point in my life where the metabolism slowed and I couldn’t keep the weight off. That lasted for nearly 15 years and for some reason my appetite suddenly plummeted and now I’m back looking at weight gainers simply to do nothing more than maintain a healthy weight.\n\nJust try to keep in mind that human physiology typically prohibits putting on large amounts of muscle in a short period of time naturally. That means that a large portion of quick gains will be fat. Embrace your high metabolism and shoot for a reasonable goal.\n\nThat said, the more calories you intake in a day that exceeds what your body can burn, the quicker you will gain weight. For the most part, it’s simple math. Total Intake - Total Burned = Energy Stored Primarily as Fat. There are about 3500 calories in one pound. If you were to forge an extra 3500 calories a day, you could theoretically gain 7 pounds a week. For someone like you, that probably means eating 8,000 calories a day.\n\nNow as far as this product goes, it’s one of the highest calorie per serving gainers I have seen and it’s much quicker to pound a shake than to eat a steak!\n\nAnother thing to keep in mind is that supplements that are fortified with vitamins and minerals, have the potential to far exceed recommended safe values for human consumption. I ran into this when I was your age. I was drinking over a gallon of milk a day, milk is fortified with vitamin D and that build up led to some freaky painful headaches in me personally.\n\nToo much calcium can also upset your bodies homeostasis and lead to surprising problems.\n\nBeing young, your body can handle a lot! Just wanted you to be aware of the things I wish I knew when I was your age.\n\nIf I were young again I would focus on speed, agility and good clean ripped muscle! Shredded muscle always looks bigger than fat muscle.\n\nCheers!"}},{"@type":"Question","name":"banana","acceptedAnswer":{"@type":"Answer","text":"I’m adding my two cents.\n\nChocolate peanut butter is the truth. Banana was good at first, and then it wasn’t."}},{"@type":"Question","name":"Does it work without work out ?because im so busy all day","acceptedAnswer":{"@type":"Answer","text":"First off, I am so sorry that everyone that responded to this question this far hasn't answered your question. I'm seeing you ask if this helps you put on weight without working out. I've seen 3 or 4 people put \"no excuses, no short cuts,\" \"no motivation, no nothing\" and other meat head answers. I apologize about them =)\n\nGetting to your question. Yes, it does help you gain weight even if you're not working out. I understand you're busy...who's not? Working out and drinking this is without question the best way to gain weight. But, for the last 2 weeks I've been drinking a scoop in the morning, and a scoop at night before bed. And I've gained 3 pounds! Doesn't sound like a lot, but if I don't get 6 eggs every morning, I'll loose 2 pounds. If I don't eat 400 calories everyday, I'll loose 2 pounds. I have such a low fat to muscle ratio that if I type it in, people won't believe me, so ill save it for the haters on YouTube (jk) 😅 \n\nBut yeah, this stuff works. Might jist be a pounds a week, but if you're like me, that's great success. This does work without working out as long as you drink it consistently. Best of luck to you my friend."}},{"@type":"Question","name":"will a high intensity sport like basketball plus weight training, 5 days a week lessen the effectiveness of this product??","acceptedAnswer":{"@type":"Answer","text":"The guy who says this causes cancer is lying or is just ignirant. Some other supplements may but even at that mant studies don't say which ones. Powder prorein supplements do not. As do many men, i don't use this product for muscle gain. I use max muscle for that. I use this for belly fat gaining."}}]}]}