Research suggests that certain vitamins and supplements may have a negative impact on liver health, potentially worsening fatty liver disease. However, the relationship between vitamins and liver health is not entirely clear, with some studies indicating that excess vitamins may be a warning sign for fatty liver disease, while others suggest that certain supplements, such as vitamin D, may actually reduce liver inflammation. The impact of various supplements, including vitamin B12 and fiber supplements, on liver health is being explored, with conflicting findings reported.