They build structure. Starch granules swell in hot water, burst, and weave a net that traps the liquid — most of what you call body comes from here. Wheat does one extra job on top: gluten.
Starch does nothing before 62 °C, and acid cuts the chains during a long boil. Think about your thickener after the heat and before the acid.
Oats and cross-contact in shared mills are separate issues; for coeliac diets, consider only products labelled gluten-free.
How to keep it, and who it suits.
Keep in an airtight container in a cool, dry, dark cupboard for 12 months.
Oats are often cross-contacted by wheat, barley or rye; a gluten-free label is required for coeliac use.
Allergen: GLUTEN
58 — glucose is taken as 100. Below 55 is low, 56–69 medium, 70 and above high. The number says nothing about portion: at the same index, twice the amount is twice the load.
Row in the table: Porridge made from rolled oats, mean of eight foods
Atkinson et al., Am J Clin Nutr 2021
Same family
FlourProtein 10–12% · builds gluten
St
StarchGelatinises at 62–72 °C
Ri
RiceAmylose 20–25% · grains stay separate
Bu
BulgurPre-cooked · steeps in 12 min
Pa
PastaDurum semolina · 1% salted water
Po
PotatoStarch 15–20% · softens at 60 °C
Tm
Sweet corn18.7% carbohydrate · 2% fibre
Ms
Wholegrain cornmeal76.9% carbohydrate · 7.3% fibre
Ir
Semolina72.8% carbohydrate · 3.9% fibre
As
Orzo pasta74.7% carbohydrate · 3.2% fibre
Tl
Vermicelli74.7% carbohydrate · 3.2% fibre
Ei
Egg noodles (dry)71.3% carbohydrate · 3.3% fibre
Yf
Yufka (uncooked börek sheets)50.1% carbohydrate · 3.1% fibre
Gy
Güllaç sheets82.7% carbohydrate · 2.5% fibre
Tk
Shredded kadayıf pastry (uncooked)61.7% carbohydrate · 3.5% fibre
Tr
Tarhana (dry)65.3% carbohydrate · 3.8% fibre
Kb
Fine bulgur75.9% carbohydrate · 12.5% fibre
Pb
Coarse bulgur70.4% carbohydrate · 6.8% fibre
Sal
Salep powder (pure)23.7% carbohydrate · 58.8% fibre
Pu
Rice flour80.1% carbohydrate · 2.4% fibre
Dv