DIY endurance fueling ingredient

Maple syrup (Grade A)

Maple syrup is mostly sucrose in liquid form — a flavour-rich and traceable DIY fueling option whose carb chemistry is close to table sugar's, at significantly higher cost.

What it is, and how to use it

Pure maple syrup is concentrated sap from the sugar maple, boiled down to roughly 67% carbohydrate by mass. The carbs are about 88% sucrose, with small amounts of free glucose, free fructose, and trace oligosaccharides — so its in-gut behaviour is essentially identical to a slightly diluted table-sugar solution.

Why use it: flavour. Maple gives a more interesting taste than refined sugar in long sessions when sweetness fatigue is a real issue. Traceability: single-source pure maple is appealing to athletes who prefer minimally-processed ingredients. Liquid form: easier to mix into bottles than dry crystals if you are prepping at the trailhead.

What it doesn't do: shift the ratio. Maple's glucose:fructose ratio mirrors sucrose at ~1:1, so it isn't a tool for high carb-rate (>90 g/h) tuning. And it doesn't lower osmolarity — the sucrose load gives it a moderate ~3.4 mOsm/g of carb; stay below 14% w/v in a sip bottle.

Cost: €18–28/kg for Grade A pure maple in Germany. Roughly 15–20× the per-gram-of-carb cost of table sugar. Best treated as a flavour ingredient in part of the plan, not the bulk base.

Composition

Total carbs: 67 % by weight
Glucose: 6 % of carb mass
Fructose: 6 % of carb mass
Other carbs: 88 % of carb mass
Sweetness factor: 1.00 × sucrose
Osmolarity: 3.40 mOsm / g carb

Typical values; expect ±10% variance between producers / lots.

Try this ingredient in the DIY endurance fueling calculator.

Sources & citations

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