Ask the doctor: What are the differences between soluble and insoluble fiber?
Soluble fiber absorbs water in the stomach and intestine and forms a gel that slows digestion. This causes you to feel full and may help with weight loss. Soluble fiber also slows the digestion and absorption of glucose, which affects blood sugar levels and sensitivity to insulin — important factors in controlling diabetes. Finally, by interfering with the absorption of dietary cholesterol, soluble fiber decreases LDL (bad) cholesterol in the blood, which helps lower the risk of heart disease. Good sources include nuts, seeds, legumes (lentils, beans, and peas, for example), oat cereals, fruit pectin (found in citrus fruits, apples, pears, apricots, and peaches), and some vegetables, such as carrots.
To continue reading this article, you must log in.
Subscribe to Harvard Health Online for immediate access to health news and information from Harvard Medical School.
- Research health conditions
- Check your symptoms
- Prepare for a doctor's visit or test
- Find the best treatments and procedures for you
- Explore options for better nutrition and exercise
I'd like to receive access to Harvard Health Online for only $4.99 a month.
Sign Me UpAlready a member? Login ».
Disclaimer:
As a service to our readers, Harvard Health Publishing provides access to our library of archived content. Please note the date of last review or update on all articles.
No content on this site, regardless of date, should ever be used as a substitute for direct medical advice from your doctor or other qualified clinician.
