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Science in Sport
Science in Sport on Kitletics covers Nutrition & Fuel (3 products) across families like SiS GO, SiS Beta Fuel. Catalog cues: GO Isotonic Gel (Thinner isotonic texture is approachable for ge…); Beta Fuel Gel (40g carbs per gel supports high-carb race targe…); Beta Fuel Drink (High carb dose aligns with Beta Fuel gel race p…). Recurring strengths include thinner isotonic texture is approachable for gel beginners, plus…
Nutrition & Fuel
3 in Nutrition & Fuel.
2 product families
Lines include SiS GO, SiS Beta Fuel.
Thinner isotonic texture is approachable…
Also: Widely available and strong value per serving
Science in Sport buying map
Science in Sport on Kitletics covers Nutrition & Fuel (3 products) across families like SiS GO, SiS Beta Fuel. Catalog cues: GO Isotonic Gel (Thinner isotonic texture is approachable for ge…); Beta Fuel Gel (40g carbs per gel supports high-carb race targe…); Beta Fuel Drink (High carb dose aligns with Beta Fuel gel race p…). Recurring strengths include thinner isotonic texture is approachable for gel beginners, plus widely available and strong value per serving. Use family roles and reviews below to decide which line fits — not a manufacturer slogan page. Science in Sport lines split by job: SiS GO (Thinner isotonic texture is approachable for gel beginners…); SiS Beta Fuel (40g carbs per gel supports high-carb race targets with fewe…). Pick the family whose weekly use case matches — not the loudest model name. 3 current-generation products in catalog. Prefer current unless a prior mode…
How lines differ
Science in Sport lines split by job: SiS GO (Thinner isotonic texture is approachable for gel beginners…); SiS Beta Fuel (40g carbs per gel supports high-carb race targets with fewe…). Pick the family whose weekly use case matches — not the loudest model name.
Generation context: 3 current-generation products in catalog. Prefer current unless a prior model still matches your sessions and street price.
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Products on Kitletics
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Categories
3
Current generation
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Product families
Science in Sport categories
What science-in-sport is known for
- 3 Nutrition & Fuel products on Kitletics
- SiS GO family with a distinct training/race role
- SiS Beta Fuel family with a distinct training/race role
- Thinner isotonic texture is approachable for gel beginners
- Widely available and strong value per serving
Kitletics picks from Science in Sport
View all Science in Sport products →
Science in Sport Beta Fuel Drink
8.7Very Good
Dual-source high-carb powder (~80g carbs per labeled serving) — designed for bottle-based race fueling when you want SiS Beta Fuel continuity between gel and drink formats
From € 24 · 1 offers
View details →Science in Sport families
SiS GOCurrent generation: GO Isotonic GelSiS GO line: Thinner isotonic texture is approachable for gel beginners Trade-off: 22g carbs means more packets to hit high hourly carb targets. Best when your week matches short training more than other SiS GO jobs. Current generation: GO Isotonic GelWho it suits: Best when your week matches short training more than other SiS GO jobs.
SiS Beta FuelCurrent generation: Beta Fuel GelSiS Beta Fuel line: 40g carbs per gel supports high-carb race targets with fewer packets Trade-off: thicker than GO Isotonic — practice fluid timing on long runs. Best when your week matches marathon more than other SiS Beta Fuel jobs. Current generation: Beta Fuel GelWho it suits: Best when your week matches marathon more than other SiS Beta Fuel jobs.
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Visit Science in Sport →Science in Sport reviews on Kitletics
View all reviews →- 8.7Very GoodFeb 2026
Science in Sport Beta Fuel Energy Drink Mix Review
Science in Sport Beta Fuel Energy Drink Mix
Science in Sport Beta Fuel Energy Drink Mix is a carb/electrolyte drink mix (80 g carbs/serving; no caffeine). Dual-source high-carb powder (~80g carbs per labeled serving) — designed for bottle-based race fueling when you want SiS Beta Fuel continuity between gel and drink formats. I'd shortlist it for high carb dose aligns with Beta Fuel gel race plans. The trade-off is sweetness can fatigue vs Maurten’s milder profile — Maurten Drink Mix 320 is the cleaner compare when that is most of your week. It fits buyers who actually need a carb/electrolyte drink mix (80 g carbs/serving; no caffeine), not a one-product rotation.
Read review → - 8.8Very GoodFeb 2026
Science in Sport Beta Fuel Dual Source Energy Gel Review
Science in Sport Beta Fuel Dual Source Energy Gel
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 review → - 8.2GoodFeb 2026
Science in Sport GO Isotonic Energy Gel Review
Science in Sport GO Isotonic Energy Gel
Science in Sport GO Isotonic Energy Gel is a energy gel (22 g carbs/serving; no caffeine). Thinner isotonic gel with 22g carbs (~87 kcal) per 60ml sachet — designed for runners who want an easy-take gel that typically needs little or no extra fluid at the moment of use. I'd shortlist it for thinner isotonic texture is approachable for gel beginners. The trade-off is 22g carbs means more packets to hit high hourly carb targets — GU Energy Gel is the cleaner compare when that is most of your week. It fits buyers who actually need a energy gel (22 g carbs/serving; no caffeine), not a one-product rotation.
Read review →
Science in Sport comparisons
Comparison
Maurten Gel 100 vs SIS GO Isotonic Gel
Both are caffeine-free pocket gels for long runs and marathon fueling. Maurten Gel 100 is the hydrogel-style default ma…
Open comparison →Comparison
SIS Beta Fuel Gel vs Neversecond C30 Gel
Both sit above basic starter gels for denser pocket carbohydrate. SIS Beta Fuel Gel lives in the Beta Fuel system; Neve…
Open comparison →
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