For example, some medications cant be given orally because acid and enzymes in the stomach would destroy them
Vitamin E supports the strength of heart muscles and capillary walls, tissue repair, normal blood clotting, circulation, and blood pressure
10.1176/ajp.151.10.1409 42 HietalaJ.SyvlahtiE.KuoppamkiM.HietalaJ.SyvlahtiE.HaaparantaM.et al (1995)

Practical strategies for taking zinc and iron supplements include: Take iron supplements in the morning on an empty stomach (at least 30 minutes before breakfast) with water or orange juice if desired Take zinc supplements in the evening , ideally 2-3 hours after your last meal or iron dose If gastrointestinal side effects occur with iron on an empty stomach, take it with a small amount of food, but avoid dairy products, tea, or coffee which further inhibit absorption Consider taking zinc with a light protein-containing snack to reduce potential nausea Maintain consistent timing daily to establish a routine and ensure compliance For individuals taking multivitamin preparations containing both minerals in modest amounts (typically less than 15mg of each), the competitive interaction is generally less clinically significant, and these can usually be taken together as directed on the product label