Real-Food and Low-FODMAP Alternatives to Gels

Real food works as a marathon fuel source in place of gels: a firm banana (~27g carbs), rice cakes with honey (~15-20g), or 2-3 dates (~20g, capped near 30g) all hit the same 30-90g/hr carb target gels do — provided you avoid the high-fibre, high-fat, and honey-heavy swaps that slow digestion at pace. The swap chart, portion ceilings, and packaging tips below cover what to substitute in and what to leave out.

You've tried three different gel brands and your gut still stages a protest somewhere around mile 16. Before you write off race-day fuelling altogether — it's not the fuelling that's the problem, it's the source.

The three most race-practical low-FODMAP real-food options are a banana that's ripe but still firm rather than fully spotty (around 27g carbs per medium fruit — a fully ripe banana carries a much higher FODMAP load at the same portion), rice cakes with a thin layer of honey or jam (15-20g per cake), and dates in small pre-portioned amounts (around 20g per 2-3 pieces, capped near 30g total). The same 30-90g/hr carb target you'd hit with gels still applies — the source is what changes, not the maths.

The Gel-to-Real-Food Swap Chart

Here's the substitution table I hand to athletes who've had enough of synthetic gels. Use it to reverse-engineer your carb target without doing the maths mid-run.

Watch your portion ceilings: banana is low-FODMAP at a full medium serving only while it's still firm — once it ripens to fully spotty, a safe low-FODMAP portion drops to roughly a third of a banana — and large volumes of honey or dried fruit push you into moderate-FODMAP territory fast. Spread your intake rather than stacking it all at once.

What Not to Substitute With

Most runners who try a real-food swap don't fail because real food doesn't work — they fail because they substitute a high-fibre or high-fat food that behaves fine at rest but causes distress at marathon-pace effort. It's the single most common mistake I see. Granola bars and whole fruit with skin are the usual culprits.

Avoid high-fibre foods — oats, whole-grain anything — since they slow gastric emptying and raise your bloating risk exactly when you can't afford it. Avoid high-fat foods too — nut butter beyond a thin smear, or a full serving of nuts — because fat delays carb absorption when you need it fastest. And be careful with high-fructose-only sources — large volumes of honey, apple, or agave — which can exceed what a single transporter can absorb and trigger the same GI distress gels cause, unless paired with a glucose source.

Packaging It for Race Day

Real food needs handling gels don't. Pre-portion everything into small snack bags or a race belt pouch the night before. Cut or break rice cakes into single-bite pieces beforehand — nobody wants to be gnawing on a whole cake at mile 20. Dried fruit and dates travel far better in heat than banana, which bruises and turns to mush in a pocket. And test your packaging choice on a long run, not race morning — a bag that leaks honey into your shorts is a lesson you only need to learn once.

I coached a runner with diagnosed IBS who switched from gels to a rice-cake-and-date rotation over an eight-week block. She finished her marathon without GI symptoms for the first time in three attempts — proof the substitution holds up at race effort, not just on paper.

If gels themselves are tolerable but your progression keeps stalling, train your gut first before assuming the product is the problem — building carb tolerance matters regardless of which fuel source you land on. And if you want to see what under-fuelling actually does to a race, read what happens when fuelling goes wrong on race day.

Back to the full marathon fuelling strategy hub for the rest of your race-day nutrition plan.

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