[Does so]

Snoozing in the sun (like this retiree does every day) doesn't suggest better bowel health.

The people that get their vitamin D from the sun are most often active, e.g., jogging.

Activity would seem (to me) to be more effective in the health of the bowel than even a daily dose of sunlight's vitamin D.

[Coldwater Creek]

Snoozing in the sun might keep you from getting colon cancer, but very likely give you Melanoma!