The important thing is that you have to be SUPER careful when selecting CBD oils. Since the cannabis industry is not FDA-regulated, there have been dozens and dozens of companies trying to get away with selling very low quality (and even potentially toxic), “snake oils” that have been extracted using harsh chemical solvents like butane and hexane. Make sure you stay away from cheap products like these, as they could damage your health.
Regarding your comment on CBD and colitis or inflammatory bowel disease. Immune cells patrol the gut to ensure that harmful microbes hidden in the food we eat do not sneak into the body. Cells that are capable of triggering inflammation are balanced by cells that promote tolerance, protecting the body without damaging sensitive tissues. When the balance tilts too far toward inflammation, inflammatory bowel disease can result. Now, researchers have found that a kind of tolerance-promoting immune cell appears that carry a specific bacterium in guts called Lactobacillus reuteri that is the normal part of the gut microbiome, and tryptophan, part of a protein-rich diet, soothes the inflamed gut because it increases the development of a population of immune cells that promote tolerance. Further, the bacterium needs tryptophan — one of the building blocks of proteins — to trigger the cells’ appearance, and the more tryptophan in the diet to feed the gut bacterium, Lactobacillus reuteri, the more of these immune cells there are.