Description
Frequently asked questions
Got more questions? See full FAQ →
Who is the SiS GO Isotonic Gel for and when does it shine?
Built for endurance athletes - marathon runners, cyclists, triathletes, ultra-runners, and anyone training 60+ minutes who needs fast carb fuel mid-effort. 22g fast-acting carbs and calories vary by flavour — see the nutrition facts panel image above in an ISOTONIC formula that does NOT require water (unlike most gels). Tear, squeeze, swallow, keep moving. Used by Tour de France cycling teams and Olympic programs. Pairs with Nuun Sport tablets for hydration alongside the carb fuel.
How and when do I use it?
Take 1 gel every 20-30 minutes during endurance work, starting at the 45-60 minute mark. Tear open the corner, squeeze into your mouth, swallow - no water needed thanks to isotonic formula. For very long efforts (3+ hours), alternate with Nuun Sport tablets for sodium. Five flavours: Orange, Lemon Lime, Tropical, Fruit Salad, Blackcurrant. Don't freeze. Test in training, never race on untested fuel.
What are the macros per gel?
Per 60ml gel: 87 calories and 22g fast-acting carbohydrate. Net Carbs = Total Carbs - Fibre - Sugar Alcohols - Allulose (where listed). Calculate per flavour from the label image - calories and net carbs vary by flavour. Designed for fast absorption during exercise - this is fuel, not a snack. The thin texture is intentional - it goes down easily even when you are out of breath.
Allergens and certifications?
Gluten-free per the brand and tags. Typically vegan (verify per flavour). Confirm Informed-Sport status with the brand for tested-sport competition - SiS has Informed-Sport variants in some markets. Default 30-day support covers opened supplements up to about 7 servings used. Onward Checkout+ upgrade extends to 90 days + 5% cash back for around 4% added at checkout. Bars and chocolate in summer are only covered by Onward.
Why should I buy from Top Nutrition & Fitness?
We're a Montreal-based supplement and snack shop that's been serving Canada since 2016 — over 10 years. Our owner personally taste-tests and hand-picks everything we carry, so you only get products we genuinely stand behind at honest value. We're an authorized retailer (real, fresh, properly stored stock — never grey-market), we pack every order carefully so it arrives in great shape, and Canada-wide shipping is fast. Friendly, product-savvy support is one message away, and every order is backed by our Onward 90-day guarantee.
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
