Bristol Stool Chart

The chart was developed to classify human feces for medical purposes:¹

• Types 1 and 2 indicate constipation.
  
• Types 3 and 4 are considered ideal stools (especially the latter), as they are easy to defecate while not containing excess liquid.
  
• Types 5, 6 and 7 tend towards diarrhea.

________¹Stool Form Scale As A Useful Guide To Intestinal Transit Time, Scandinavian Journal of Gastroenterology, 1997.