Pectin Molecular Weight and Yogurt Texture: a Non-Linear Relationship
Source: Food Science and Human Wellness · 2026 · DOI 10.26599/FSHW.2026.9251117
A study fractionating citrus pectin by molecular weight found that gel strength in yogurt systems does not scale monotonically with chain length.
Key findings
- The intermediate fraction (~20 kDa) produced weaker, more flowable gels, while both the ~40 kDa and ~7.8 kDa fractions reinforced the protein network (study conditions).
- Gel strength therefore depends on the molecular-weight distribution — 'higher MW means stronger gel' does not hold.
- The authors link the effect to how different chain lengths interact with the casein network during acidification.
What this means for your formulation
Grade selection for drinking and stirred yogurt should be validated against your target texture — the same pectin type can behave differently across MW distributions. Our application team screens candidates against your recipe.
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