Overview
About Golden syrup
Golden syrup, the amber tin in every British baking cupboard, is cane sugar that has been partially inverted.
During refining an acid step splits part of the sucrose into free glucose and free fructose, which is what stops the syrup crystallising and gives it the buttery caramel flavour it is bought for. That single chemical step is why it grades differently from the sugar it came from. Cane sugar is A for excess fructose, because its fructose is locked to glucose in a one-to-one sucrose molecule and the two travel across the gut wall together. Inversion unlocks part of that, leaving free fructose that has to cross on GLUT5 by itself. Golden syrup therefore grades C for excess fructose, C for total FODMAPs and C for SIBO fermentability: borderline and dose dependent, easy enough by the teaspoon over porridge and considerably less easy in a tray of flapjacks or a treacle tart. Away from sugar chemistry it is quiet, grading A for gluten, histamine and histamine liberation, salicylates, oxalates, sulfites, nickel, glutamates, lactose and dairy protein.
Sensitivities
How Golden syrup scores
Watch for
What trips people up
- Partial inversion is the whole story. Free fructose from split sucrose puts golden syrup at C for excess fructose, where the uninverted cane sugar it is made from grades A
- C for total FODMAPs and C for SIBO fermentability, which is awkward given that golden syrup is used almost exclusively in sticky baking where nobody stops at a teaspoon
- Do not confuse it with black treacle or molasses. Those grade D for FODMAPs, D for sulfites and C for salicylates, so they are a different and broader risk than the one on this page
- Gluten free by composition at A, even though it usually turns up bound into wheat flour in flapjacks, gingerbread and tarts
- Refined sugar all the same: D for anti-inflammatory eating and D against DASH and Mediterranean patterns
Diet fit
Where it fits
Swap ideas
More alternatives
FAQ
Common questions about Golden syrup
Is golden syrup low FODMAP?
Only in small amounts. It grades C for total FODMAPs and C for excess fructose, the borderline band, because partial inversion leaves free fructose that is not matched by glucose. A teaspoon is usually manageable if fructose is your issue; a serving of flapjack or treacle tart delivers several times that.
Is golden syrup high in fructose?
It has more free fructose than the cane sugar it starts as, which is the point of the process. Inversion splits sucrose into its glucose and fructose halves so the syrup stays smooth and does not crystallise, and it is that unbound fructose, rather than total sugar, that pushes its excess-fructose grade from A up to C.
Is golden syrup the same as corn syrup?
No, though they behave similarly in a recipe and land in the same borderline band. Golden syrup is cane derived and partially inverted, with a caramel flavour of its own. Corn syrup is made by hydrolysing corn starch and is largely flavourless. Both grade C for FODMAPs and C for excess fructose, but golden syrup is also C for SIBO fermentability where plain corn syrup grades A.
Is golden syrup gluten free?
Yes. It grades A for gluten because it is made entirely from sugar cane with no grain input. The caution is what it is baked into rather than the syrup itself, since its traditional uses are wheat-heavy.
References
Read the background
Ratings reflect the Triggerbites ingredient database and may vary with portion size and preparation.