Science in Sport Beta Fuel 80 (powder)

80 g carbs per 1 sachet (82 g in 600 ml) · 1:0.8 maltodextrin:fructose. Graded for five standard jobs below — the same product fits some jobs and not others.

dual-source
Check it for your own job →

Job fit

Beta Fuel 80 (powder) works when the job is Marathon, 70.3, IRONMAN, Century / gran fondo, Ultra.

Marathon
3.5 h · race · target 80 g/h → 1/h
A
✓ dual-source 1:0.8 · absorbs at 80 g/h✓ gut-friendly≈ 600 ml/h · needs a flask or aid-station cupsℹ caffeine not statedℹ sodium not statedℹ 13.3 % solution · chase with water
70.3
5.5 h · race · target 90 g/h → 1.1/h
A
✓ dual-source 1:0.8 · absorbs at 90 g/h✓ gut-friendly≈ 675 ml/h for the carbs · mix stronger, chase with waterℹ caffeine not statedℹ sodium not statedℹ 13.3 % solution · chase with water
IRONMAN
12 h · race · target 90 g/h → 1.1/h
A
✓ dual-source 1:0.8 · absorbs at 90 g/h✓ gut-friendly≈ 675 ml/h for the carbs · mix stronger, chase with waterℹ caffeine not statedℹ sodium not statedℹ 13.3 % solution · chase with water
Century / gran fondo
5 h · steady · target 80 g/h → 1/h
A
✓ dual-source 1:0.8 · absorbs at 80 g/h✓ gut-friendly✓ 600 ml/h at 13.3 % · fits 650 ml/hℹ caffeine not statedℹ sodium not statedℹ 13.3 % solution · chase with water
Ultra
10 h · steady · target 80 g/h → 1/h
A
✓ dual-source 1:0.8 · absorbs at 80 g/h✓ gut-friendly≈ 600 ml/h · needs a flask or bottleℹ caffeine not statedℹ sodium not statedℹ 13.3 % solution · chase with water

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 sachet (82 g in 600 ml)
Carbohydrate
80 g
Carb sources (label order)
maltodextrin, fructose
Glucose:fructose
1:0.8 maltodextrin:fructose · ~44 % fructose (declared)
Sodium
not stated
Potassium
not stated
Caffeine
not stated
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
13.3 % solution as directed (hypertonic)

80 g carbohydrate per 82 g sachet at 1:0.8, mixed with 600 ml (20 oz) per the maker — a 13 % solution the maker describes as isotonic-formula.

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 Beta Fuel 80 (powder) per hour do I need?

At 80 g carbs per 1 sachet (82 g in 600 ml): about 0.8 per hour for 60 g/h and 1.1 per hour for 90 g/h. Use the fuel checker to set your own job.

Is Science in Sport Beta Fuel 80 (powder) dual-source (glucose and fructose)?

Yes — 1:0.8 maltodextrin:fructose (declared), about 44 % fructose, which is in the range that absorbs at 90 g/h and beyond.

Does Science in Sport Beta Fuel 80 (powder) contain caffeine?

Caffeine is not stated on the source we checked — read the pack.

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