Gastrointestinal issues are quite common, as a large portion of the population suffers from IBS and GERD, among other issues.
However, some of these people have discovered the healing properties of cannabis when it comes to the stomach and intestinal troubles. The reason why cannabis is so effective is that the walls of the GI tract are lined with endocannabinoid receptors, which cannabinoids bind to.
This means that not only THC and CBD, but even terpenes and the other cannabinoids found in cannabis can be helpful against digestive problems. Especially when combined, such as in full-spectrum oils, for example.
Whenever looking for the best strains for gastrointestinal discomfort, make sure to pick those with a balanced THC:CBD ratio, and opt primarily for Indica strains that are more body-centered.