Why are multivitamins so big?

Multivitamins are often large because they contain a combination of multiple vitamins and minerals that need to be compacted into a single pill. The size allows for sufficient quantities of nutrients to be included, as many vitamins and minerals are required in relatively high doses for effectiveness. Additionally, the manufacturing process and the use of binding agents can contribute to their larger size. Many consumers also prefer the convenience of taking a single large tablet rather than multiple smaller ones.