good mornin',
there are many delivery mechanisms, the preferred being sub-lingual, ingestion, vaporization, and topical applications. personally i do all those and also smoke.
for issues with the gut, sub-lingual and/or oral ingestion of CBD has shown most effective, and so has the ingestion of THC/THC-A (the acidic form of THC that is also non-psychoactive, unless decarboxylated by heat).
another cool thing, there are even hemp based meds that have 0% THC, and strains such as Charlotte's Web and Harle-Tsu that have <1% THC, created so they would be accessible for patients (including children) interested in the medicinal benefits without the "high".
i have read/heard of several stories from people who swear they have been completely symptom free from Crohn's or UC since they started a daily CBD regimen. the daily amount seems to range from 50mg-100mg (which i would recommend building up to, as with any new ).
its been a little different for me because i have FAP not Crohn's or UC, and have self-medicated since adolescence, but i guess i see it more as a way of life/part of life than i do a "medicine".
i definitely see many more positive effects with virtually no side effects, especially when compared to the "medicines" i've taken over the past year that presented all types of negative and paradoxical effects.