About Logical Square
Logical Square, based in Houston, TX, is a branded ingredient company with a mission to provide safe, scientifically tested, and efficacious natural extracts as branded ingredients for use in dietary supplements and functional foods and beverages.
Harnessing The Power of Plants with CaFi
CaFi is a standardized extract of Cassia fistula fruit pulp, clinically studied to support healthy bowel function, promote gut health and digestive health. CaFi® is supported by human clinical studies across both pediatric (ages 6–15) and adult populations experiencing constipation and irregular bowel habits — demonstrating statistically significant improvements across multiple clinically relevant endpoints.
- Constipation Support
- Gut Comfort
- Bowel Regulatory Support
- Digestive Support

