The Bulk Protein Company, SERIOUS GAINZ - Whey Protein Powder - Weight Gain, Mass Gainer - 30g Protein Powders (Chocolate, 5kg)
by The Bulk Protein Company
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SERIOUS GAINZ is a high-calorie mass gainer from The Bulk Protein Company delivering 468 kcal, 30g protein and 81g carbs per serving from a blend of whey isolate, soy, casein and oat flour — positioned for hardgainers who struggle to eat enough calories. Best for Hardgainers and ectomorphs who struggle to consume enough daily calories and Budget-conscious gym-goers in structured bulking phases.
According to the AIScored 0–100 scoring system, The Bulk Protein Company, SERIOUS GAINZ - Whey Protein Powder - Weight Gain, Mass Gainer - 30g Protein Powders (Chocolate, 5kg) by The Bulk Protein Company scores 63.0/100, ranking #145 out of 174 products in Whey Protein (2026). Strongest category: Side Effects (78.0/100). Weakest: Certifications (20.0/100).
Is The Bulk Protein Company, SERIOU... worth buying?
“SERIOUS GAINZ from The Bulk Protein Company packs 468 calories and 30g protein per serving with a mixed protein blend designed for both quick and sustained recovery. Scoring 63/100, it's a genuinely competitive mass gainer at a fair price per kilogram, with reviewers reporting real strength and mass gains over several months.”
What Do Reviewers Say About The Bulk Protein Company, SERIOUS GAINZ - Whey Protein Powder - Weight Gain, Mass Gainer - 30g Protein Powders (Chocolate, 5kg)?
Sample excerpts from currently available source material used in this product analysis.
"Been using this product for years... Started at £25 about 7 years ago obviously due to British pound going down in value the price has risen. Still a good price. High carb shake with minimul sugars. I have bought similar products from Holla..."
"Waste of money, the powder hardily blends into a shake even after thoroughly blending. Weak chocolate flavour and just leaves the powder around the inside of your mouth after each drink. This is a poor product and would not recommend to any..."
"Thought I’d try a different protein powder and I’m sure it will do the job, But it does not mix well at all and there is very little in the way of chocolate taste. In fact it doesn’t really taste that good as you can taste more of the oat b..."
"Okay so there’s two sides to this, there’s the experience of drinking it and then there’s the results. In all honesty it doesn’t taste nice, not like other brands. I find myself drinking it as quickly as possible holding my breath so I can’..."
"OMG 5 kilos of it!! Absolute bargain!! Ok so I have used it It mixes very easy, not as thick compared to some other shakes but not a problem, it has good protein to carb ratio The flavour yeah it is chocolate-ish but although not heavenly c..."
How does The Bulk Protein Company, SERIOUS GAI... score?
Detailed score breakdown and key findings from our analysis of 13 reviews across 1 source.
Pros
- +Delivers genuine calorie surplus (468 kcal/serving) — multiple reviewers report significant mass and strength gains over 6–12 months
- +Competitive price per kilogram for a 5 kg tub, frequently cited as best-value in its class
- +Mixed protein matrix (whey isolate + casein + soy) provides both fast and sustained amino acid release, supporting overnight and inter-session recovery
- +Oat flour as carbohydrate source offers a lower glycaemic option versus maltodextrin-heavy rivals
- +Mixes smoothly in a blender or Nutri Ninja — users who blend report good texture and acceptable chocolate taste
Cons
- -Weak, flat chocolate flavour reported consistently — several reviewers describe an oat/cereal aftertaste that dominates
- -Clumps significantly when shaken by hand; mixing quality highly dependent on using a blender rather than a shaker
- -Lower protein density than a typical whey concentrate (≈22g/100g) — not suitable as a standalone protein supplement for non-bulking goals
- -Not third-party tested; contains peanut, soy and oat allergens — unsuitable for those with relevant intolerances
Best For
Watch Out
- !Clumping and poor taste when mixed with a hand shaker — a blender is effectively required
- !Peanut, soy and oat allergens present — check carefully if you have intolerances
- !High carbohydrate content (81g/serving) is not appropriate for fat-loss or body-recomposition goals
- !No third-party certification — ingredient label claims cannot be independently verified
What is The Bulk Protein Company, SERIOUS GAINZ - Whey Protein Powder - Weight Gain, Mass Gainer - 30g Protein Powders (Chocolate, 5kg)?
The Bulk Protein Company, SERIOUS GAINZ - Whey Protein Powder - Weight Gain, Mass Gainer - 30g Protein Powders (Chocolate, 5kg) is a whey protein product by The Bulk Protein Company in powder form, scoring 63.0/100 on AIScored.
- • HIGH-CALORIE MASS GAIN FORMULA WITH 30G PROTEIN PER SERVING – SERIOUS GAINZ by The Bulk Protein Company is positioned as one of the high calorie drinks for weight gain, delivering approximately 468 calories, 30g protein and 81g carbs per serving to help hardgainers stay in a consistent calorie surplus.
- • Designed for anyone needing extra calories to increase size and strength, it supports muscle recovery, training performance and progressive weight gain when paired with a structured eating plan.
- • SUPPORTS MUSCLE GROWTH & POST-WORKOUT RECOVERY – Each serving provides a balanced blend of protein and carbohydrates to replenish energy after training and support lean muscle growth.
- • The combination of soy protein powder, whey isolate protein powder, casein protein powder and oat flour delivers both fast and sustained amino acid release, helping refuel muscles, restore glycogen levels and maintain a high daily protein intake for better recovery and improved performance between sessions.
- • MIXES BEST WITH MILK FOR A SMOOTHER, MORE ENJOYABLE SHAKE – As a bulking protein powder, SERIOUS GAINZ can be prepared with water or milk, though many users prefer milk for a smoother, richer and more consistent texture.
- • Adding liquid first, shaking thoroughly or using a blender helps reduce clumps and creates a creamier shake that’s easier to drink during heavy bulking phases.
- • This preparation method makes each serving more enjoyable and supports daily consistency as calorie needs increase.
- • FILLING FORMULA DESIGNED TO HELP MAINTAIN A DAILY CALORIE SURPLUS – This mass gainer delivers a dense, satisfying shake that helps men and women stay on track with daily calorie targets during bulking phases.
- • Its naturally filling consistency supports a sustained surplus, while starting with smaller servings, adding more liquid or spacing intake can help maintain comfortable, consistent nutrition throughout the day.
Is The Bulk Protein Company, SERIOUS GAINZ - Whey Protein Powder - Weight Gain, Mass Gainer - 30g Protein Powders (Chocolate, 5kg) Independently Tested?
No Third-Party Testing Visible
We could not find evidence of independent third-party testing for this product. This doesn't mean it's unsafe, but independent verification provides additional assurance.
How We Score Supplements
Our methodology analyses review data, ingredient science, and product information, then scores each product on a 0-100 scale across evidence-based categories:
Effectiveness
How well the product delivers its claimed benefits, based on reviews and ingredient evidence.
Ingredient Quality
Bioavailable forms, clinically effective dosages, clean label, minimal fillers.
Value for Money
Price relative to ingredient quality, dosage count, and effectiveness.
Side Effects Profile
Higher score = fewer side effects. 100 means virtually no adverse reactions reported.
Certifications & Testing
Third-party lab testing, GMP certification, and independent quality verification.
Overall Score
Weighted combination of all factors. Our bottom-line recommendation.
Price History (90 days)
Quick Facts
- Form
- Powder
- Serving
- 3 scoops
- Vegan
- No
Frequently Asked Questions
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Is The Bulk Protein Company, SERIOUS GAINZ - Whey Protein Powder - Weight Gain, Mass Gainer - 30g Protein Powders (Chocolate, 5kg) third-party tested? ▼
What the Data Says About Whey Protein
What makes a clean whey protein? Ingredient quality scores across 169 UK products
Fewer ingredients = cleaner protein. We scored 169 whey proteins on ingredient quality (IQ) and the gap between top and bottom is massive: 65 points, from 95/100 down to 30/100.
The top 7 products by IQ all share one trait — minimal ingredient lists:
- PINK SUN Organic Whey Concentrate — IQ 95, overall 85
- Isopure Unflavoured Whey Isolate — IQ 91, overall 76
- LEGION Whey+ Isolate — IQ 91, overall 80
- PINK SUN Whey Isolate Unflavoured — IQ 91, overall 81
- Purition 100% Whey Isolate 93% Protein — IQ 91, overall 80
- Dymatize ISO100 — IQ 90, overall 84
- Naked Whey (1 ingredient) — IQ 90, overall 74
The bottom tells the opposite story. Products like BodyFuel Clear Protein (IQ 30), Amfit Nutrition (IQ 38), and Protein Dynamix 3XP (IQ 38) use multi-source protein blends padded with artificial sweeteners, thickeners, and colourings.
The average across all 169 products is 70.7/100. If your whey protein has more than 5-6 ingredients, check what's filling up that list. A clean whey needs protein, maybe a natural flavour, and not much else.
Can cheap whey protein cause bloating? What to check on the label
Cheap whey often causes bloating because of what's added to the protein, not the protein itself. We scored 169 whey proteins and the worst-scoring products share the same filler-heavy ingredient profiles.
Three categories of additives show up repeatedly in low-IQ products (scored 30-42):
- Thickeners — xanthan gum, carrageenan, cellulose gum. These bulk up texture but can cause gas and bloating in sensitive stomachs.
- Artificial sweeteners — sucralose, acesulfame-K, aspartame. Linked to gut microbiome disruption in some studies. Budget brands use these heavily.
- Anti-caking agents and emulsifiers — added to improve mixability, but another source of digestive irritation.
Products like BodyFuel Clear Protein (IQ 30), Amfit Nutrition (IQ 38), and SCI-MX Ultra Muscle (IQ 42) stack several of these additives together.
Compare that to the top scorers: PINK SUN Organic Whey (IQ 95) and Naked Whey (IQ 90) use 1-3 ingredients total. No thickeners, no artificial sweeteners, no fillers. Users report far less digestive trouble with these minimal formulas.
Label check shortcut: flip the tub over. If the ingredient list has more than 6 items, or you spot carrageenan, sucralose, or acesulfame-K, that's your likely bloating culprit. A whey isolate with a short list costs a bit more but your gut will thank you.
Disclaimer: AIScored provides research-backed summaries based on publicly available reviews and product information. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Affiliate links may earn us a commission at no extra cost to you.
What Are Other Top Whey Protein?
Other top-rated whey protein you might want to compare.
100% Whey Protein Isolate, 93% Protein, Triple-Filtered, Unsweetened, Unflavoured, Soy Free, Low Fat, 23g Protein per Serving, 20 Servings - 500g
Purition
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Optimum Nutrition
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Millidose
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Protein Dynamix
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