Consider the following,
Gut Zoomer will provide insight into any dysbiosis contributing to constipation (e.g. Methanobrevibacter smithii) and how well colonocytes are being nourished (e.g., SCFA levels secondary to dietary fiber intake).
Micronutrients is always helpful in motivating patients to consume a more robust eating pattern.
Candida + IBS Profile which can provide insight into whether a past food borne illness is contributing to gut stasis by turning off the Migrating Motor Complex.