Product Description
The SIS Isotonic Energy Gel delivers fast-acting carbohydrates in a convenient no-water-needed format. Unlike most gels, it’s isotonic — formulated at the same concentration as your body fluids — so it absorbs quickly without causing stomach discomfort. Perfect for athletes, gym-goers, and anyone needing a clean, quick energy boost during training or competition. Winner of the Queen’s Award for Enterprise and the world’s first isotonic energy gel.
Key Benefits
- Rapid energy release — 22g fast-acting carbohydrates per gel
- No water needed — isotonic formula absorbs without dilution
- Easy to carry — pocket-sized 60ml sachet
- Zero caffeine — suitable any time of day
- Refreshing Lemon & Lime flavour
- Vegan, gluten-free and Informed Sport certified
How to Take
Take 1 gel 15 minutes before exercise or during activity as needed. Consume directly from the sachet — no water required. Aim for 1–3 gels per hour during intense exercise to meet 60–90g carbohydrate targets.
Ingredients
Water, Maltodextrin (26%), Fructose (6%), Citric Acid, Natural Flavouring, Sodium Chloride, Potassium Chloride, Sodium Benzoate (Preservative), Acesulfame K (Sweetener).
Quick Info Table
| Brand | Science in Sport (SiS) |
| Format | Box of 6 × 60ml gels |
| Flavour | Lemon & Lime |
| Energy Per Gel | ~87 kcal | 22g Carbs |
| Suitable For | Vegan · Gluten Free · Informed Sport Certified |
| Best For | Running, Cycling, Gym, Team Sports, Endurance |
| SKU | SIS003 |
15 reviews for SIS Isotonic Gels 6×60ml – Lemon & Lime
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Gladys Wanjiru –
I’ve been using this for about a month now and it doesn’t have that weird protein-powder aftertaste. Happy with this purchase.
Faith Otieno –
Third time ordering this and it doesn’t have that weird protein-powder aftertaste. This has become part of my routine now.
Cynthia Kiprono –
Picked this up after seeing it online and it’s become my go-to snack on busy work days. Paid via M-Pesa, checkout was smooth and easy. Five stars from me!
Boniface Wambua –
Third time ordering this and it keeps me full for hours. First time importing something like this and the process was surprisingly easy. Exactly as described, no complaints.
Isaac Kamau –
Bought this as a gift and also tried it myself, it keeps me full for hours. Ordered on a Monday, got it delivered in Eldoret by the following week. Worth every shilling.
Amos Muli –
Ordered this after a friend recommended it and great to keep in my bag for when I’m out all day. Arrived well packaged all the way from Europe, no damage at all. Already told my friends about it.
Belinda Odhiambo –
I’ve been using this for about a couple of months now and it tastes amazing and isn’t chalky like other bars. Took almost two weeks to get to Eldoret, patience needed. Decent value, will consider reordering.
Maureen Waithera –
Picked this up after seeing it online and it keeps me full for hours. Paid via M-Pesa, checkout was smooth and easy. Will be ordering again soon.
Lucy Onyango –
Was skeptical at first but the macros are perfect for what I need. Customer service was helpful when I asked about my order status. Would recommend to anyone in Kenya looking for this.
David Ochieng –
Picked this up after seeing it online and it’s the best tasting protein bar I’ve tried so far. Arrived well packaged all the way from Europe, no damage at all. Already told my friends about it.
Loise Onyango –
Ordered this after a friend recommended it and it’s the best tasting protein bar I’ve tried so far. Customer support was slow to respond to my first email but sorted it eventually. Might try again but not in a rush.
Moses Kibet –
I’ve been using this for about two weeks now and the macros are perfect for what I need. Customer service was helpful when I asked about my order status. Worth every shilling.
Maureen Auma –
Finally restocked after running out and it doesn’t have that weird protein-powder aftertaste. Delivery to Nyeri took about 7 days, well packaged. Would recommend to anyone in Kenya looking for this.
Emily Onyango –
Finally restocked after running out and it’s become my go-to snack on busy work days. Worth every shilling.
Moses Kagwe –
Third time ordering this and it tastes amazing and isn’t chalky like other bars. Customer service was helpful when I asked about my order status. Exactly as described, no complaints.