What vitamins and minerals do I need?Get your blood levels of vitamin D checked. Most people are deficient in vitamin D but even more so if you have IBD. If you google “vitamin D Crohn's”, “vitamin D ulcerative colitis”, “vitamin D cancer”, or vitamin D anything you will see that it is important for maintaining health against a host of diseases.
A multivite wouldn't hurt. You should also probably get your blood levels of iron, B12, folate, etc., especially if you bleed a lot. Here is an example of vitamin D helping IBD Crohn's:
m.medicalxpress.com/news/2015-06-vitamin-d-crohn-disease.htmlIn a double-blind randomised placebo-controlled study, the authors assigned 27 CD patients in remission to 2000 IU/day vitamin D supplementation or placebo for 3 months. They found, that patients treated with the supplementation were more likely to maintain their intestinal permeability, whereas this deteriorated in the placebo group.
Increased intestinal permeability is considered a measure of gut leakiness, which is shown to predict and precede clinical relapse in CD. In addition, patients with the highest blood levels of vitamin D had signs of reduced inflammation (measured by C-reactive protein and antimicrobial peptides), and these patients also reported better quality of life.