Wheat starch mixed with peanut skin polyphenols and digestion resistance
What it found
Mixing wheat starch with polyphenols from peanut skins slowed its digestion in lab tests.
The main reason was that the polyphenols blocked a key digestive enzyme.
What they found
Animal and lab studies
Lower estimated glycemic index
The estimated glycemic index dropped when wheat starch was mixed with peanut skin polyphenols. Values fell to 79.9, 77.4, and 76.9 for the red, white, and black mixes.
More ordered starch structure
The starch formed more short-range ordered structures after mixing. Total crystallinity also rose, highest with black peanut skins at 3.91%, then red at 3.45% and white at 3.44%.
Enzyme activity reduced
Polyphenols released during digestion blocked the activity of alpha-amylase, an enzyme that breaks down starch. This blocking effect was the main reason the starch resisted digestion.
What the authors conclude
- They found that the ability of released polyphenols to block enzymes was the main factor slowing starch digestion.
- Their work offers new understanding of how starch structure and enzyme blocking relate to digestion resistance.
How it was done
Scientists wanted to know if compounds from peanut skins could slow down how fast wheat starch is digested. They also wanted to find out exactly why this happens.
Researchers combined wheat starch with polyphenols taken from red, white, and black peanut skins. They then measured how these mixtures changed the starch structure and digestion in lab tests.
What it can’t tell you
- We summarised it from the abstract only.
- These were lab tests on starch and enzymes, not studies in people or animals. They cannot show what actually happens when someone eats these mixtures.
Who paid
- Conflicts
- Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
- Authors work at
- Institute of Agro-Product Processing, PR China; Taizhou Institute of Agricultural Sciences, PR China
The paper
- Title
- Mechanistic insights into the digestion resistance of wheat starch upon complexation with peanut skin polyphenols
- Type
- Study
- Evidence
- Animals and lab studies
- Summarised from
- Abstract only
- Cite
- Xu L, Wang Z, Feng M, et al (2025). Mechanistic insights into the digestion resistance of wheat starch upon complexation with peanut skin polyphenols. Food chemistry. doi:10.1016/j.foodchem.2025.144468PubMed 40286721DOI
Summary written 30 Sep 2026. Check it against the paper before it changes what you eat. How we summarise papers · Report an error