Description
Frequently asked questions
Got more questions? See full FAQ →
Who is Carb-X for, and what does it pair with?
Made for: endurance athletes on long sessions (cycling, running, triathlon, hyrox), bodybuilders training at high intensity needing intra-workout glycogen support without bloating, CrossFit athletes who burn through glycogen in metcons, hard gainers stacking clean calories into shakes, and competitive athletes needing an Informed-Sport tested carb source. Why Cluster Dextrin (highly branched cyclic dextrin) over maltodextrin or sugar: digests fast but easier on the stomach — no sugar spike, no heavy stomach. If you struggle with mid-workout fatigue or stomach issues from sugary intra-workouts, Carb-X solves both. Not for keto / low-carb — 25g pure carbs per serving. Pairs well with: any amino blend or BCAAs for intra-workout sipping, Applied Nutrition Creatine Gummies, ABE Energy Drink for the full pre-workout stack, or a TNF whey protein post-workout for glycogen + protein recovery.
How and when do I take it?
Mix 1 scoop (25g) with 400ml water, consume before, during, or after exercise. For long or competition sessions, sip throughout to maintain energy levels. Pre-workout: 15–30 min before training, alongside whey or BCAAs. Intra-workout: sip during sessions longer than 60 min — this is where Carb-X really shines vs solid food carbs. Post-workout: combine with protein within 60 min to replenish glycogen and amplify recovery. Flavours: Fruit Burst (most popular per TNF customer mentions), Orange Burst, Unflavoured (stacks neutrally with amino, creatine, pre/intra-workout drinks).
What are the macros, and how do I calculate net carbs?
Each 25g scoop delivers 25g carbohydrates from Cluster Dextrin (highly branched cyclic dextrin), 0g sugar, 0g fat, with negligible protein. See the nutrition facts panel image for the exact per-serving figures. Net carbs formula: Net Carbs = Total Carbs − Fibre − Sugar Alcohols − Allulose (where listed). For exact macros of the flavour you pick, see the nutrition facts panel image on this page. Net carbs ~= 25g per scoop. The point of Carb-X is fast-digesting clean carbs — this is intentional, not a flaw. Strict keto eaters should avoid; everyone training hard for > 60 min benefits.
Allergens, gluten-free, vegan, certifications?
Informed-Sport tested & athlete-approved per the TNF Key Benefits — safe for tested competitive athletes (verify the current cert on the tub before competition use). Gluten-free: yes (Cluster Dextrin / cyclic dextrin base — not gluten-containing; verify facility statement on the tub). Vegan: yes (no animal-derived ingredients). Sugar-free, zero fat. Sweetened with: sucralose + acesulfame potassium per TNF ingredient list. Halal: not specifically marketed — check the tub. Allergens: see the tub label; Carb-X is one of the cleaner allergen profiles in the Applied Nutrition lineup. Default 30-day TNF returns cover opened supplements (used ≤ 7 servings). Onward Checkout+ at checkout adds 90-day protection + 5% cash back (~4% premium, stacks with TNF Rewards) for full peace of mind.
How fast is shipping in Canada and what does it cost?
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.
Can I pick up in-store? Where are you and is there parking?
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.
What's your return policy + the Onward 90-day guarantee?
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 →
What's the TNF Rewards Program?
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
