Science in Sport GO Energy + Caffeine Gel

22 g carbs per 1 gel (60 ml) · glucose-type only · 75 mg caffeine. Graded for five standard jobs below — the same product fits some jobs and not others.

single-sourceisotonic75 mg caffeine
Check it for your own job →

Job fit

It falls short for Marathon, 70.3, IRONMAN, Century / gran fondo, Ultra — see the reasons under each grade.

Marathon
3.5 h · race · target 80 g/h → 3.6/h
D
✗ single-source · pair with a fructose source✓ gut-friendly≈ 3.6/h · a lot to carry running✗ 75 mg each · 955 mg over 3.5 h, above 6 mg/kgℹ sodium not statedℹ isotonic — no extra water needed
70.3
5.5 h · race · target 90 g/h → 4.1/h
D
✗ single-source · pair with a fructose source✓ gut-friendly≈ 4.1/h · a lot to carry✗ 75 mg each · 1688 mg over 5.5 h, above 6 mg/kgℹ sodium not statedℹ isotonic — no extra water needed
IRONMAN
12 h · race · target 90 g/h → 4.1/h
D
✗ single-source · pair with a fructose source✓ gut-friendly≈ 4.1/h · a lot to carry✗ 75 mg each · 3682 mg over 12 h, above 6 mg/kgℹ sodium not statedℹ isotonic — no extra water needed
Century / gran fondo
5 h · steady · target 80 g/h → 3.6/h
D
✗ single-source · pair with a fructose source✓ gut-friendly✓ 3.6/h · easy to carry✗ 75 mg each · 1364 mg over 5 h, above 6 mg/kgℹ sodium not statedℹ isotonic — no extra water needed
Ultra
10 h · steady · target 80 g/h → 3.6/h
D
✗ single-source · pair with a fructose source✓ gut-friendly≈ 3.6/h · a lot to carry running✗ 75 mg each · 2727 mg over 10 h, above 6 mg/kgℹ sodium not statedℹ isotonic — no extra water needed

Grades: A–E from absorption (35 %), gut (30 %), practicality (15 %), caffeine (10 %) and your preferences (10 %); a ✗ on absorption or gut caps at C. Sodium and tonicity are shown as ℹ and never change the grade.

What is in it

Label facts, not a score. Apply your own preferences in the checker.

Format
Isotonic gel
Unit
1 gel (60 ml)
Carbohydrate
22 g
Carb sources (label order)
maltodextrin
Glucose:fructose
glucose-type only · ~0 % fructose (inferred)
Sodium
not stated
Potassium
not stated
Caffeine
75 mg
Protein / fat / fibre
not stated / not stated / not stated
Sugar alcohols
none listed
Sweeteners
none listed
Allergens
not stated
Vegan / gluten-free
not stated / not stated
Batch-tested
not stated
Tonicity
isotonic

The GO Isotonic gel plus 75 mg caffeine; "no extra water is needed" per the maker, who suggests one gel 30 min before a hard effort and 1–2 late in a long one. Maltodextrin-based (single-source).

From the manufacturer's page, checked 2026-09-18 · source. Labels change; read the pack. Not medical advice; not affiliated with the brand.

How many Science in Sport GO Energy + Caffeine Gel per hour do I need?

At 22 g carbs per 1 gel (60 ml): about 2.7 per hour for 60 g/h and 4.1 per hour for 90 g/h. Use the fuel checker to set your own job.

Is Science in Sport GO Energy + Caffeine Gel dual-source (glucose and fructose)?

No — its carbs are glucose-type only (glucose-type only). Fine up to about 60 g/h; above that, pair it with a fructose source.

Does Science in Sport GO Energy + Caffeine Gel contain caffeine?

Yes, 75 mg per 1 gel (60 ml). Keep the day's total inside 3–6 mg per kg of body mass and under about 400 mg.

Other isotonic gels