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Study · Nature communications · 2025Conflicts declared

Capsaicin-rich chili pepper diets, gut inflammation and short stature in children and rats

Wang Y, Wu Z, Yuan J, et al · Free full text

What it found

Children with unexplained short stature had higher levels of a specific molecule in their blood and stool, linked to chili pepper intake.

A capsaicin-rich diet caused mild gut inflammation and stunted growth in rats.

What they found

Studies in people

Shorter children, more miR-17-3p

Blood samples from 106 children with unexplained short stature contained much higher levels of a molecule called miR-17-3p than samples from 106 healthy children. Stool samples from these shorter children also showed more of this molecule along with signs of gut inflammation.

Chili pepper intake and short stature

The authors reviewed data showing that unexplained short stature is more common in Chinese provinces where people eat the most chili peppers. For example, Hunan province consumes 7.57 million tons of peppers each year, and residents there eat about 111.57 kg per person annually.

Animal and lab studies

Capsaicin diet stunted rat growth

Young rats fed a diet with 0.01% capsaicin for 28 days ended up shorter and lighter than rats on a normal diet. The capsaicin-fed rats developed mild gut inflammation and higher blood levels of miR-17-3p, matching what was seen in the shorter children.

Capsaicin inflamed gut cells

In lab tests, high amounts of capsaicin (200 µM) stopped human intestinal cells from growing and triggered cell death. Lower amounts (25, 50 and 75 µM) actually helped the cells multiply. The high dose turned on an inflammation pathway that raised miR-17-3p levels.

Engineered particles restored growth

Scientists built tiny particles designed to block miR-17-3p and deliver growth hormone directly to bone cartilage. In rats made short by extra miR-17-3p, this treatment restored normal bone growth better than growth hormone alone.

What the authors conclude

  • They conclude that eating a lot of capsaicin can trigger mild gut inflammation, which raises miR-17-3p levels and slows down bone growth in children.
  • They advise paying closer attention to how chili-heavy diets affect the height of children, especially those already at risk for short stature or receiving growth hormone treatment.
  • They suggest that blocking miR-17-3p with targeted treatments could help children who do not respond well to standard growth hormone therapy.

How it was done

The authors wanted to find out why some children are unusually short without a clear medical cause. They noticed that regions in China where people eat the most chili peppers also have more cases of this condition.

They compared blood and stool from 106 children with unexplained short stature to 106 healthy children. They also fed young rats a diet containing 0.01% capsaicin for 28 days and tested human and rat cells in the lab.

What it can’t tell you

  • This study links chili pepper consumption to short stature through regional patterns, but it cannot prove that eating chili peppers causes children to stop growing.
  • The rat experiments used a specific capsaicin dose for 28 days, so scientists do not yet know if typical amounts of chili pepper in a child's diet would have the same effect.
  • Lab tests on isolated gut cells may not reflect how a whole human body handles spicy food over many years.

The paper

Title
Capsaicin diet drives gut inflammation and exosomal miR-17-3p elevation in idiopathic short stature
Type
Study
Evidence
Studies in people · animals · lab
Summarised from
Full text
Cite
Wang Y, Wu Z, Yuan J, et al (2025). Capsaicin diet drives gut inflammation and exosomal miR-17-3p elevation in idiopathic short stature. Nature communications. doi:10.1038/s41467-025-67883-2Free full textPubMed 41469526DOI

Summary written 1 Oct 2026. Check it against the paper before it changes what you eat. How we summarise papers · Report an error