🍫 Fuel your hustle with Serious Mass — because gains wait for no one!
BULK UP SMARTER - Formulated for serious lifters who demand quality and quantity in every scoop.
PROTEIN POWERHOUSE - 50 grams of premium protein to sculpt and repair muscles after every workout.
DELICIOUSLY INDULGENT - Satisfy your sweet tooth with a rich chocolate flavor that makes nutrition feel like a treat.
MASSIVE CALORIE BOOST - Fuel your gains with 1250+ calories per serving—because average just won’t cut it.
GLOBAL QUALITY DELIVERED - Imported directly to ensure you get authentic ON Serious Mass, no compromises.
ON Serious Mass Chocolate 2727g is a high-calorie mass gainer designed for adults seeking rapid muscle growth and recovery. Each serving delivers over 1250 calories and 50 grams of protein, wrapped in a rich chocolate flavor. Imported for authenticity, it’s tailored for serious athletes and fitness enthusiasts aiming to bulk up efficiently.
Specifications
Product Dimensions
15.6 x 15.6 x 24.8 cm; 900 g
Target Age Range Description
Adult
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??
Perfect!!! Delivered fast and in perfect condition.
T**C
Had pain in the right breast after using it
Taste is alright, but I had pain in right side of the chest (around nipple area) after using it. When I stopped eating it pain went away. I had same problem before when I was eating "Mutant Mass". I hoped this product will be higher quality and I wont get same problem, but actually it was the same. I dont know which ingredient caused this reaction but I do not recommend that product.
Common Questions
Trustpilot
TrustScore 4.5 | 7,300+ reviews
Zainab N.
Fantastic and great service. Shipping was faster than expected.
1 week ago
Fatima A.
Best international shipping I've ever tried. Worth every penny!
","image":["https://m.media-amazon.com/images/I/71hUgJcU8oL.jpg","https://m.media-amazon.com/images/I/71akueP55wL.jpg","https://m.media-amazon.com/images/I/81dFJwHoGJL.jpg","https://m.media-amazon.com/images/I/813x40tf2kL.jpg","https://m.media-amazon.com/images/I/81fHl2zRotL.jpg","https://m.media-amazon.com/images/I/71o0KRKcbVL.jpg","https://m.media-amazon.com/images/I/81-HTFNgA1L.jpg"],"offers":{"@type":"Offer","priceCurrency":"EUR","price":"33.78","itemCondition":"https://schema.org/NewCondition","availability":"https://schema.org/OutOfStock"},"review":[{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"5.0"},"author":{"@type":"Person","name":"B***S"},"datePublished":"February 20, 2025","name":"Very happy","reviewBody":"Very happy, arrived quickly."},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"5.0"},"author":{"@type":"Person","name":"L***N"},"datePublished":"February 10, 2025","name":"健康食品","reviewBody":"商品は予想より早く到着し、味も素晴らしかったです。どうもありがとう。"},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"4.0"},"author":{"@type":"Person","name":"A***ー"},"datePublished":"March 17, 2025","name":"1ヶ月半で5kg増量","reviewBody":"1日の摂取カロリー2700kcalの目標達成が容易になり、177cm59kgから1ヶ月半で64kg5kg増量出来ました。カップ1杯600kcalはでかいです。今まで食事プラスプロテインではほとんど太れなかったのが嘘のようで、ガリガリの人ほどウェイトゲイナーを活用すべきですね。BMI22になるまで筋トレと栄養摂取を頑張ります。"},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"3.0"},"author":{"@type":"Person","name":"T***N"},"datePublished":"October 3, 2024","name":"効果を感じない","reviewBody":"効果を感じない"},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"5.0"},"author":{"@type":"Person","name":"あ***あ"},"datePublished":"February 8, 2024","name":"総評めちゃくちゃいい","reviewBody":"全然体重が増えず悩んでいたのですが、こちらを使用して筋トレをし8kgほど増量しました。胃袋小さい民にとって、一杯で700kcalはデカいです。本当はカップ2杯ですが、1杯分の栄養価を調べてみました。↓カップ1杯 625kcal カロリー25.0g たんぱく質2.5g 脂質 0.00g -飽和脂肪酸 0.00g - n-3脂肪酸 0.00g - n-6脂肪酸 Omgコレステロール 127.0g炭水化物 125.6g -糖質 2.0g - -食物繊維 0.52g塩分 780mgカリウム 295mgカルシウム 70mgマグネシウム 218mgリン 4.0mg鉄 6.5mg亜鉛 0.80mg銅 35µgセレン 37µgモリブデン 250µgビタミンA 100.0µgビタミンD 15.0mgビタミンE 60.00mgビタミンB1 0.00mgビタミンB2 0.00mgビタミンB6 0.00ビタミンB12 0.00葉酸 200 µgプロテインはどこも味のレビューが多く、肝心の栄養価が書いていないことが多いですね。プロテインなんて美味しくないものだと思ってるので正直どうでもいいのですが、味は100点満点中30点です。嫌らしい甘さ、どろっとした舌触り、いつまでも消えない泡、お世辞にも美味いとは言えないです。まあプレーンのソイプロテインの水割りよりは全然マシです👍🏻マルトデキストリンが大量に含まれているのでこぼしたりすると水拭きしないと溶けた飴がついたようなベタベタが残るので注意です。他のプロテインに負けない栄養分があるので、嫌なところを相殺して⭐️5でした。あと、デカめのシェイカーを買った方がいいです。最低でも600ml"},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"5.0"},"author":{"@type":"Person","name":"B***N"},"datePublished":"February 20, 2024","name":"oke","reviewBody":"very good"},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"5.0"},"author":{"@type":"Person","name":"T***I"},"datePublished":"April 24, 2022","name":"Perfect, i recommend.","reviewBody":"Perfect!!! Delivered fast and in perfect condition."},{"@type":"Review","reviewRating":{"@type":"Rating","ratingValue":"1.0"},"author":{"@type":"Person","name":"T***C"},"datePublished":"January 9, 2020","name":"Had pain in the right breast after using it","reviewBody":"Taste is alright, but I had pain in right side of the chest (around nipple area) after using it. When I stopped eating it pain went away. I had same problem before when I was eating \"Mutant Mass\". I hoped this product will be higher quality and I wont get same problem, but actually it was the same. I dont know which ingredient caused this reaction but I do not recommend that product."}],"aggregateRating":{"@type":"AggregateRating","ratingValue":4.125,"bestRating":5,"ratingCount":8}},{"@type":"FAQPage","mainEntity":[{"@type":"Question","name":"How well does this work? 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."}}]}]}