Rye

Studies in people

• Open question

  Blood sugar after meals³

  Eating wholemeal rye instead of refined rye did not clearly lower blood sugar after meals in these studies.

• Benefit

  Blood sugar control⁴

  In people, eating rye did not change blood sugar levels but may lower insulin after meals.

• Benefit

  Heart attack and diabetes risk⁵

  People who ate more whole grains like rye had lower risk of heart attack and diabetes.

• Benefit

  Appetite and blood sugar⁷

  In people, eating rye bread or rye kernels led to lower insulin and less hunger later, so they ate less at lunch.

• Benefit

  Iron absorption from bread⁸

  Sourdough rye bread let women absorb more iron than regular rye bread, but the amount was still small.

• Benefit

  Weight and belly fat⁹

  In people with obesity, eating wholegrain rye for 12 weeks was linked to losing more weight and fat than refined wheat.

• Benefit

  Weight and body fat loss¹⁰

  People eating high fiber rye products while cutting calories lost more weight and body fat than those eating refined wheat.

• Open question

  Appetite and insulin response¹¹

  Sourdough-fermented rye crispbread left people less hungry, but unfermented rye crispbread gave the lowest insulin response.

• No harm found

  Prostate cancer progression¹²

  In men with slow-growing prostate cancer, eating whole-grain rye plus exercise showed no clear effect on the disease.

Study type not stated

• Benefit

  Gut health¹³

  Rye is rich in fibre and plant compounds that gut bacteria may turn into useful substances.

Allergies and intolerances

These are about people with an allergy, an intolerance or coeliac disease. The signal is about the ingredient itself, and these are about the person eating it, so the signal does not count them.

• Gluten and celiac disease⁶

  Rye has gluten, which is a barrier for people with celiac disease.

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.