Yam

Animal and lab studies only

• Benefit

  Blood fat and gut health⁷

  In hamsters, resistant starch from purple yam changed gut bacteria and improved blood fat levels.

• Benefit

  Liver fat in diabetes⁸

  In diabetic rats, Yam Gruel lowered blood sugar and reduced fat buildup in the liver.

• Benefit

  Blood sugar control⁹

  In animal studies, Chinese yam polysaccharides helped lower blood sugar in diabetic mice.

• Benefit

  Swelling and inflammation¹⁰

  In lab and animal studies, yam extract lowered inflammation markers and paw swelling in mice.

Found in some samples or products

These come from where it was grown, how it was processed or cooked, or what it was made into. They are not about the ingredient itself, so the signal does not count them.

• Toxins and spoilage⁵

  Cassava and yam can carry mould toxins, pesticides and heavy metals, and yam also spoils badly after harvest.

How it’s made and used

• Minerals in root crops³

  Yam provides minerals like potassium, calcium and iron that the body needs, though amounts differ by species and variety.

• Blood sugar after meals⁴

  Pounded yam raised blood sugar quickly in healthy people who ate it in this study.

• Blood sugar after eating⁶

  Yam flour cooked by steaming then cooling released its sugar more slowly than baked yam flour.

The signal at the top counts the findings in people and in animal and lab studies. A concern in studies of people outranks animal and lab studies, and “No concerns” needs at least one finding in people. When most findings in people point one way, the page leans that way (“Mostly”), and every finding is still shown. Findings whose study type is not stated are shown but not counted. This page is a reference, not medical advice. It describes what regulators and published research say. Talk to a doctor or dietitian about your own diet.