The Carbs Nutrition Guide (Grains & Potatoes)
Sourdough (white)
Per 100 g as eaten — cooked for grains, pasta, and roots; as sold for bread. One serving = 50 g (Breads (excluding sweet quick type), rolls), the FDA reference amount (21 CFR 101.12).
GI(glucose = 100)
Atkinson et al., International tables of glycemic index and glycemic load values 2021 — Supplemental Table 1 ISO pooled means (Am J Clin Nutr) (2021)
GL(per 100 g)
18.6 per serving
Atkinson et al., International tables of glycemic index and glycemic load values 2021 — Supplemental Table 1 ISO pooled means (Am J Clin Nutr) (2021)
ANSES Ciqual 2025 — French food composition table — pain au levain, sourdough (7002) (2025)
Fiber(g/100g)
1.1 g per serving
ANSES Ciqual 2025 — French food composition table — pain au levain, sourdough (7002) (2025)
Net carbs(g/100g)
26.6 g per serving
ANSES Ciqual 2025 — French food composition table — pain au levain, sourdough (7002) (2025)
Energy(kcal/100g)
131 kcal per serving
ANSES Ciqual 2025 — French food composition table — pain au levain, sourdough (7002) (2025)
Protein(g/100g)
3.7 g per serving
ANSES Ciqual 2025 — French food composition table — pain au levain, sourdough (7002) (2025)
Sodium(mg/100g)
250 mg per serving
ANSES Ciqual 2025 — French food composition table — pain au levain, sourdough (7002) (2025)
Empty cells mean we do not yet have a method-cited source. Rank on the guide tables is the open-rule champion — not medical advice.