Beta Fuel Gel
High-carb dual-source gel with 40g carbs (~158 kcal) per serving — designed for marathon and long race fueling when you want SiS availability with fewer packets than GO Isotonic.
- Energy Gels
- Race Fuel Systems
- Best forEnough of what is built for without stretching it into another job.
- CategoryNutrition & Fuel
Overview
High-carb dual-source gel with 40g carbs (~158 kcal) per serving — designed for marathon and long race fueling when you want SiS availability with fewer packets than GO Isotonic.
Buy the Beta Fuel Gel when high-carb dual-source gel with 40g carbs (~158 kcal) per serving — designed for marathon and long race fueling when you want SiS availability with fewer packets than GO Isotonic.. It earns a look for 40g carbs per gel supports high-carb race targets with fewer packets. Look elsewhere if thicker than GO Isotonic — practice fluid timing on long runs.
- 40g carbs per gel supports high-carb race targets with fewer packets
- Dual-source maltodextrin/fructose format for structured endurance fueling
- Strong retail availability vs niche race-fuel brands
Kitletics Review · 8.8 Very Good
Science in Sport Beta Fuel Dual Source Energy Gel is a energy gel (40 g carbs/serving; no caffeine). High-carb dual-source gel with 40g carbs (~158 kcal) per serving — designed for marathon and long race fueling when you want SiS availability with fewer packets than GO Isotonic. I'd shortlist it for 40g carbs per gel supports high-carb race targets with fewer packets. The trade-off is thicker than GO Isotonic — practice fluid timing on long runs — Maurten Gel 160 is the cleaner compare when that is most of your week. It fits buyers who actually need a energy gel (40 g carbs/serving; no caffeine), not a one-product rotation.
Read Kitletics Review →Performance scores
- Format8.8
- Carbohydrate delivery9.5
- Caffeine preference8.8
- Carrying8.6
- Taste / texture8.0
- Race use9.0
Overall score: 8.8
Pros & cons
Pros
- 40g carbs per gel supports high-carb race targets with fewer packets
- Dual-source maltodextrin/fructose format for structured endurance fueling
- Strong retail availability vs niche race-fuel brands
Cons
- Thicker than GO Isotonic — practice fluid timing on long runs
- Fewer flavour options than the GO range
- Still not a high-sodium electrolyte product
How it fits different uses
| Use case | Score |
|---|---|
High-Carb Fueling High-carb gel lane with matching drink-mix continuity. | 90 |
Marathon Strong SiS race gel when you want high carbs with retail availability. | 89 |
Kitletics Review
A buying decision based on structured product data and evidence — not invented star ratings or fake user reviews.
Kitletics Review
Verdict
Science in Sport Beta Fuel Dual Source Energy Gel is a energy gel (40 g carbs/serving; no caffeine). High-carb dual-source gel with 40g carbs (~158 kcal) per serving — designed for marathon and long race fueling when you want SiS availability with fewer packets than GO Isotonic. I'd shortlist it for 40g carbs per gel supports high-carb race targets with fewer packets. The trade-off is thicker than GO Isotonic — practice fluid timing on long runs — Maurten Gel 160 is the cleaner compare when that is most of your week. It fits buyers who actually need a energy gel (40 g carbs/serving; no caffeine), not a one-product rotation.
Pros
- 40g carbs per gel supports high-carb race targets with fewer packets
- Dual-source maltodextrin/fructose format for structured endurance fueling
- Strong retail availability vs niche race-fuel brands
Cons / Trade-offs
- Thicker than GO Isotonic — practice fluid timing on long runs
- Fewer flavour options than the GO range
- Still not a high-sodium electrolyte product
Best for
- Enough of what is built for without stretching it into another job.
- Over a generalist when energy gel (40 g carbs/serving; no caffeine) is the weekly filter.
- Dual-source maltodextrin/fructose format for structured endurance fueling.
- Strong retail availability vs niche race-fuel brands.
Not ideal for
- Those looking for thicker than GO Isotonic.
- Those looking for different tool when this role is not your week.
- Those looking for Maurten Gel 160 when a energy gel (40 g carbs/serving; no caffeine) is not.
- Those looking for Fewer flavour options than the GO range.
Performance breakdown
- Role fit8.8· Editorial
- Value8.2· Editorial
Scale: Poor (1–3) · Fair (4–5) · Good (6–7) · Very Good (8) · Excellent (9–10)
How it performs
What it is
Science in Sport Beta Fuel Dual Source Energy Gel is a energy gel (40 g carbs/serving; no caffeine). High-carb dual-source gel with 40g carbs (~158 kcal) per serving — designed for marathon and long race fueling when you want SiS availability with fewer packets than GO Isotonic.…
Key specs
Science in Sport Beta Fuel Dual Source Energy Gel — published figures worth using as filters: • type: gel • serving size: 60ml sachet • calories: 158 • carbs per serving: 40 • sugars: 19 • caffeine: no • protein: 0 • fluid required: Water available recommended for thicker.…
Fit & daily use
Fit has to work for a energy gel (40 g carbs/serving; no caffeine), not as a one-size story. High-carb dual-source gel with 40g carbs (~158 kcal) per serving — designed for marathon and long race fueling when you want SiS availability with fewer packets than GO Isotonic. If.…
Performance
Everyday performance is the energy gel (40 g carbs/serving; no caffeine) brief, not a universal score. High-carb dual-source gel with 40g carbs (~158 kcal) per serving — designed for marathon and long race fueling when you want SiS availability with fewer packets than GO.…
Should you buy it?
Buy if
- You're looking for 40g carbs per gel supports high-carb race targets with fewer packets.
- You want enough of what Beta Fuel Gel is built for without stretching it into another job.
- You prefer over a generalist when energy gel (40 g carbs/serving; no caffeine) is the weekly filter.
- 40g carbs per gel supports high-carb race targets with fewer packets
Skip if
- You need to avoid thicker than GO Isotonic — practice fluid timing on long runs.
- You prefer a different tool when this role is not your week.
- You prefer Maurten Gel 160 when a energy gel (40 g carbs/serving; no caffeine) is not the weekly.
- Thicker than GO Isotonic — practice fluid timing on long runs
Final verdict
Science in Sport Beta Fuel Dual Source Energy Gel is a energy gel (40 g carbs/serving; no caffeine). High-carb dual-source gel with 40g carbs (~158 kcal) per serving — designed for marathon and long race fueling when you want SiS availability with fewer packets than GO Isotonic. I'd shortlist it for 40g carbs per gel supports high-carb race targets with fewer packets. The trade-off is thicker than GO Isotonic — practice fluid timing on long runs — Maurten Gel 160 is the cleaner compare when that is most of your week. It fits buyers who actually need a energy gel (40 g carbs/serving; no caffeine), not a one-product rotation.
Alternatives to consider
MaurtenGel 160Why choose this instead: Want better value?
9.1 · ExcellentFrom € 3,90Compare →
Precision Fuel & HydrationPF 30 GelWhy choose this instead: Want better value?
9.0 · ExcellentFrom € 3,30Compare →
NeversecondC30 GelWhy choose this instead: Want better value?
8.9 · Very GoodFrom € 3,20Compare →
Related guides
Featured in
How we assessed it
How we assessed the Science in Sport Beta Fuel Dual Source Energy Gel: this is Expert Research. We used manufacturer specifications, the published role as a energy gel (40 g carbs/serving; no caffeine), and a comparison set (Gel 160, PF 30 Gel, C30 Gel, GO Isotonic Gel). We have not personally tested this product. Feel claims and scores are research-informed, not a wear diary.
Review type: Expert Research Review.
Read how we review products →Compare with
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Specifications
Specifications
| Type | Gel |
|---|---|
| Serving Size | 60ml sachet |
| Calories | 158 kcal |
| Carbohydrate | 40 g |
| Sugars | 19 g |
| Contains Caffeine | No |
| Protein | 0 g |
| Fluid Required | Water available recommended for thicker dual Carb gels |
| Texture / Form | Gel |
| Flavour | Orange / Lemon & Lime (typical) |
| Pack Size | Box of 30 |
| Dietary Labels | Vegan |
SiS Beta Fuel family
Where to buy
Showing offers for Netherlands. Prices may change at the retailer.
Amazon.nl
in stockMarketplaceNLLast checked 12 September 2026€ 3,40View on Amazon
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Sources & evidence
Transparency behind this Kitletics Review — not a substitute for the buying decision above.
Editorial research
Independent expert reviews & Kitletics editorial analysis
Used to cross-check ride, fit, category placement and buying trade-offs. Not a Kitletics personal wear-test.
Verified 12 September 2026
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