Ask Nurse Lynn: Digesting Vegetables: Raw vs Cooked

Question:

Male, 25 years old, UPD subtype

My son has had a cycle of ER visits and hospital admittances for constipation. The only treatment that seems to work recently is a gastrogaffin enema. His GI doctor has him on a very good regiment. He has over 15 ER visits and 4 hospital admits since January 5. He lives at a group home with nutritional orders. Now he is only allowed to have cooked fruits and cooked vegetables. The servings of cooked vegetables are limited to 1 – 2 servings per meal. He seemed to do fine on raw vegetable in the past and his GI regiment was working well then the raw vegetable allowance was decreased prior to the cycle. He had a 10lb weight gain as a result of the hospital admittances and access to a lot of food at the hospital. What is your opinion on raw vegetables and raw fruits in a young PWS adult?

Nurse Lynn’s Response:

Fruits and vegetables can be served raw or cooked, and each one affects the body a little differently. Raw vegetables and fruits usually have more natural fiber and more “bulk.” That bulk can help stretch the intestines and gently wake up the colon so stool moves along. Raw foods also take longer to chew and digest.

Cooked fruits and vegetables are softer and easier for the stomach and intestines to handle. When food is cooked, heat breaks down the tough plant fibers. This can make it gentler on the digestive system, especially for someone who has slow digestion, low muscle tone, or gets bloated easily. Cooked foods also contain water, which can help keep stool softer and easier to pass.

In PWS, many people have slow gut movement because of low muscle tone and differences in how the brain and body control digestion. Some individuals do better with the stronger “push” from raw vegetables. Others do better with the softer texture of cooked foods. There is no one rule that works for everyone.

The most important thing is watching how the body responds. Good hydration, regular movement, and a consistent bowel plan matter just as much as whether food is raw or cooked.

Please note that we are temporarily pausing submissions for our Ask Nurse Lynn column from July 12 – August 24, 2026.