Product category
Vitamin complexes: narrower than a multivitamin
Vitamin complexes sit between a single vitamin and a full multivitamin. They are useful when you want a formula built around one theme, such as a B-vitamin mix or another focused combination.
The category is broad, so the label matters more than the name. Two products can both be called a vitamin complex while containing very different ingredients and amounts.
Before choosing one, check what you already take. A complex can reduce the number of bottles on the shelf, but it can also repeat nutrients that are already covered elsewhere.
If the reason for use is pregnancy planning, medication, a restricted diet, or persistent symptoms, it is better to look at the wider picture first. The best fit is usually the one that keeps the plan clear.