Tailwind Nutrition Endurance Fuel · Caffeinated

25 g carbs per 1 scoop (27 g in ~355 ml) · 35 mg caffeine. Graded for five standard jobs below — the same product fits some jobs and not others.

35 mg caffeinevegangluten-freebatch-tested (informed-choice)carries sodium
Check it for your own job →

Job fit

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

Marathon
3.5 h · race · target 80 g/h → 3.2/h
C
≈ dual-source · ratio not declared✓ gut-friendly≈ 1136 ml/h · needs a flask or aid-station cups≈ 35 mg each · 1–2 doses, not hourlyℹ 129 % of your sodium
70.3
5.5 h · race · target 90 g/h → 3.6/h
D
≈ dual-source · ratio not declared✓ gut-friendly✗ 1278 ml/h just for the carbs✗ 35 mg each · 693 mg over 5.5 h, above 6 mg/kgℹ 145 % of your sodium
IRONMAN
12 h · race · target 90 g/h → 3.6/h
D
≈ dual-source · ratio not declared✓ gut-friendly✗ 1278 ml/h just for the carbs✗ 35 mg each · 1512 mg over 12 h, above 6 mg/kgℹ 145 % of your sodium
Century / gran fondo
5 h · steady · target 80 g/h → 3.2/h
D
≈ dual-source · ratio not declared✓ gut-friendly✗ 1136 ml/h just for the carbs✗ 35 mg each · 560 mg over 5 h, above 6 mg/kgℹ 129 % of your sodium
Ultra
10 h · steady · target 80 g/h → 3.2/h
C
≈ dual-source · ratio not declared✓ gut-friendly≈ 1136 ml/h · needs a flask or bottle✗ 35 mg each · 1120 mg over 10 h, above 6 mg/kgℹ 129 % of your sodium

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
Drink mix
Unit
1 scoop (27 g in ~355 ml)
Carbohydrate
25 g
Carb sources (label order)
dextrose, sucrose
Glucose:fructose
not declared (label order is not a proportion)
Sodium
303 mg
Potassium
90 mg
Caffeine
35 mg
Protein / fat / fibre
not stated / not stated / not stated
Sugar alcohols
none listed
Sweeteners
none listed
Allergens
not stated
Vegan / gluten-free
vegan / gluten-free
Batch-tested
informed choice
Tonicity
7 % solution as directed

Endurance Fuel with 35 mg caffeine per scoop (maker's figure); carbohydrate and sodium as the non-caffeinated version (100 kcal, 25 g, 303 mg).

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 Tailwind Nutrition Endurance Fuel · Caffeinated per hour do I need?

At 25 g carbs per 1 scoop (27 g in ~355 ml): about 2.4 per hour for 60 g/h and 3.6 per hour for 90 g/h. Use the fuel checker to set your own job.

Is Tailwind Nutrition Endurance Fuel · Caffeinated dual-source (glucose and fructose)?

The label lists dextrose, sucrose and no ratio is declared, so the checker treats it as "ratio not declared" (≈) above 60 g/h — never as a fail.

Does Tailwind Nutrition Endurance Fuel · Caffeinated contain caffeine?

Yes, 35 mg per 1 scoop (27 g in ~355 ml). Keep the day's total inside 3–6 mg per kg of body mass and under about 400 mg.

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