Lactosérum mutant (5 lb)

Built for: anyone trying to gain muscle, recover from training, or hit a daily protein target, lifters, bodybuilders, athletes, people who train 3+ times a week, and anyone whose food alone doesn't get them to ~1.4–2.0g of protein per kg of bodyweight (the range active people need). (varies by flavour — see the nutrition facts image above for the exact macros of each one) When to take it: post-workout is the classic window (within 30 min of training) — your muscles soak it up fastest. Also great in the morning to break the overnight fast, as a meal supplement when you're eating light, or mixed with milk before bed for slow overnight protein. Standard dose: 1 scoop (~30g powder) in 8–12 oz of water or milk. If you struggle to hit daily protein, this is the simplest fix.

~61 servings per 5 lb tub (1 scoop = 37g) — one of the best price-per-serving values in our protein lineup. Per scoop: about 22–24g protein (whey concentrate + isolate blend), ~140 calories, low carbs and fat. Net carbs calculation: Net Carbs = Total Carbs − Fibre. Exact numbers vary by flavour — the complete nutrition facts panel and full written ingredient list is in the product images and product description above this FAQ. Taste: Mutant flavours (Triple Chocolate, Chocolate Fudge Brownie, Strawberry & Cream, Cookies & Cream, Vanilla Ice Cream) are some of the strongest-tasting on the market — closer to a milkshake than a diet shake. Mixes cleanly, no chalky aftertaste. Best with milk for the full milkshake effect.

Yes — we accept returns on opened protein powder under our default 30-day policy as long as you've used 7 servings or fewer. Just email info@topnutritionandfitness.com with your order number within 30 days. Refunds are issued as store credit. Want a stronger guarantee? Add Onward Checkout+ at checkout (~4% of order) for a 90-day satisfaction guarantee covering taste, sensitivities, and opened products, plus 5% cash back on your next order (stacks with TNF Rewards). See full return policy →

Mutant Whey is Informed-Choice Certified — every batch is third-party lab tested for banned substances, making it safe for competitive and tested athletes. Sweetened with sucralose (no aspartame). Contains milk (whey is dairy-derived) and is processed in a facility with soy and wheat. NOT vegan. The complete written ingredient list, allergen warnings, and full nutrition panel are in the product images and the description above this FAQ — please check before ordering if you have sensitivities. Mutant is a proudly Canadian brand and follows Health Canada's NPN supplement regulations.

Same-day shipping from our Montreal store if you order before 4 PM EST Monday–Friday — hand-packed by our team at our downtown location, often faster than Amazon. Free shipping over $125 CAD subtotal. $12 flat over $50. Delivery: Quebec & Ontario typically 1–3 business days, other provinces 3–7. Express options at checkout. Domestic Canadian shipping — NO duties or customs fees. We're at 3575 Av. du Parc inside Galeries du Parc, downtown Montreal.

Yes — free store pickup, ready in 30 minutes during store hours. We're at 3575 Av. du Parc, Local 5635 inside Galeries du Parc underground mall, downtown Montreal. Our online inventory is the same as our in-store inventory — if it's in stock on the website, it's also available in-store, since every order ships directly from the same physical store. Tell us at the cash and we'll give you a free 1-hour validated parking voucher — drop it in the parking machine on your way out for free indoor mall parking. Store hours: Mon 11 AM–8 PM, Tue–Fri 11 AM–6 PM, Sat–Sun 11 AM–5 PM.

Default: free 30-day return policy — yes, even on opened supplements (as long as you've used 7 servings or fewer). Closed food items over $20 are also returnable. Damaged or wrong items are always replaced free — email info@topnutritionandfitness.com with a photo within 48 hours of delivery. Refunds are issued as store credit (gift card good online or in-store). Heads up: bars that soften or change shape during summer heat are only covered under Onward, not under our default policy (they're still safe + edible — refrigerate flat to reshape). Want longer + fuller coverage? Tap Checkout+ Now at checkout (~4% of order) to add Onward — a 90-day satisfaction guarantee (taste dislike, sensitivities, mold, damaged / lost / stolen / wrong / missing items, even opened products), 5% cash back on your next order (stacks with TNF Rewards), and instant 24-hour claim resolution. See full return policy →

Top Nutrition & Fitness Rewards is our free loyalty program — join from any product page or your account. What you can earn:

• Points on every dollar you spend — accumulate balance toward future orders
• Bonus points for writing product reviews after your order arrives
• Referral bonus — share your unique invite link; both you and your friend earn when they place their first order

How to redeem: convert points to cash discounts on your next purchase or free products at checkout. Online + in-store sync: your TNF Rewards balance is shared between our online store and our Montreal storefront — as long as you use the same email at checkout (online or at the cash register), points add to the same account. Stacks on top of Onward Checkout+ 5% cash back for double rewards. Open the TNF Rewards page →