Bulk Lean Mass Gainer, Protein Shake, Vanilla, 1 kg, Packaging May Vary
by Bulk
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Bulk Lean Mass Gainer is a multi-protein blend (whey, milk protein, egg white) paired with Scottish oats as the carbohydrate source, delivering a 1:1 protein-to-carb ratio at 34g each per 85g serving. Best for Hardgainers and beginners struggling to increase calorie intake and Weight trainers wanting a moderate-carb gainer without excessive sugar.
According to the AIScored 0–100 scoring system, Bulk Lean Mass Gainer, Protein Shake, Vanilla, 1 kg, Packaging May Vary by Bulk scores 67.0/100, ranking #118 out of 174 products in Whey Protein (2026). Strongest category: Side Effects (80.0/100). Weakest: Certifications (28.0/100).
Is Bulk Lean Mass Gainer, Protein S... worth buying?
“Bulk's Lean Mass Gainer scores 67/100 and packs 34g of protein per 85g serving from a blend of whey, milk protein, and egg white. The oat-based carbs are a real advantage here—they're gentler on the gut and lower GI than the maltodextrin you'll find in cheaper alternatives.”
What Do Reviewers Say About Bulk Lean Mass Gainer, Protein Shake, Vanilla, 1 kg, Packaging May Vary?
Sample excerpts from currently available source material used in this product analysis.
"Mixes well, tastes good and extremely good price for what quality you get. Because it has small amount of maltodextrin, other powders that have a lot of it will screw with your gut health and stomach. This mass gainer causes no stomach pain..."
"Rapport qualité prix imbattable. Ultra ultra protéine. Je recommande. En revanche le goût de fraise est rapidement lassant mais bon… on ne le boit pas par pur plaisir mais pour la pdm"
"It’s a lean mass gainer, made from fine milled oats, too early to say how well it works, I mix with milk as bf use a blender to make it more like a milk shake, it does taste a bit chalky but I find it tastes ok and come on, it’s more bout w..."
"I've previously used both this and the standard Bulk Pure Whey protein powder. This one actually turns out to be way less efficient and good value for money. I'll explain why. So I bought the 1kg bag. This lean version obviously advertises..."
"Vorab muss ich sagen, dass ich noch nicht viele Proteinpulver probiert habe, tatsächlich nur ebenfalls das von Bulk, was zu der Zeit im Angebot war. Nachdem ich allerdings etwas Variation wollte habe ich zu der Erdbeervariante gegriffen und..."
How does Bulk Lean Mass Gainer, Protein Shake,... score?
Detailed score breakdown and key findings from our analysis of 13 reviews across 1 source.
Pros
- +High protein density — 34g per 85g serving compares favourably with many premium brands
- +Multi-source protein blend (whey, milk, egg white) provides both fast- and slow-release amino acids
- +Oat-based carbs rather than pure maltodextrin — gentler on the gut and lower GI
- +Competitively priced for the macro profile delivered
- +Multiple positive reports of noticeable muscle gain and recovery improvements
Cons
- -Grainy texture from ground oats — noticeable when mixed with water; blending with milk recommended
- -Only ~11 servings per 1kg bag at the full 3-scoop dose — bag depletes faster than expected
- -Some reviewers find the sweetness level excessive, particularly in chocolate variants
- -No third-party certification (Informed Sport etc.), which may matter to tested athletes
Best For
Watch Out
- !Grainy texture — mix vigorously in a vortex shaker or blend; water alone gives worst results
- !Serving count: 1kg yields only ~11 full servings at 85g dose, not a month's supply
- !Not suitable for vegans (contains whey, milk protein, and egg white)
- !No Informed Sport or NSF certification — competitive athletes subject to doping rules should verify
What is Bulk Lean Mass Gainer, Protein Shake, Vanilla, 1 kg, Packaging May Vary?
Bulk Lean Mass Gainer, Protein Shake, Vanilla, 1 kg, Packaging May Vary is a whey protein product by Bulk in powder form, scoring 67.0/100 on AIScored.
- • A carefully balanced formula that provides a 1:1 ratio of protein and carbohydrates Powered by 34 g protein and 34 g carbohydrates per serving A blend of whey protein, milk protein and egg white powder provides a mix of slow and fast proteins Perfect for trainers who want to build muscle and cut down on carbs; High in protein which contributes to the growth of muscle mass Available in a range of delicious flavours, this is your perfect training partner.
Is Bulk Lean Mass Gainer, Protein Shake, Vanilla, 1 kg, Packaging May Vary 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
- Vegan
- No
Frequently Asked Questions
Is Bulk Lean Mass Gainer, Protein Shake, Vanilla, 1 kg, Packaging May Vary worth buying in 2026? ▼
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What are the pros and cons of Bulk Lean Mass Gainer, Protein Shake, Vanilla, 1 kg, Packaging May Vary? ▼
Is Bulk Lean Mass Gainer, Protein Shake, Vanilla, 1 kg, Packaging May Vary 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
50g High Protein Shake Chocolate 500ml
Optimum Nutrition
1kg unflavoured Protein Powder - unflavoured whey Protein Powder Perfect for a high Protein Shake or Snack - whey Nutrition for Building Muscle - 38g of Protein per Serving
Millidose
3XP Whey Protein Powder - Whey, Pea & Hydrolysed Wheat Blend for Lean Muscle Growth - Banana Flavour - 22g Protein • 127kcal Per Serving - 1Kg
Protein Dynamix
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