Although antioxidants and vitamins are sometimes discussed together, they are not the same thing. Vitamins are essential nutrients, while antioxidants are compounds — some of which may be vitamins — that help protect cells from oxidative stress.
Vitamins are organic nutrients that the body needs in specific amounts to function normally. Examples include:
Vitamin C
Vitamin D
Vitamin B complex
Vitamin A, E, and K
They play roles in metabolism, immune function, vision, and many other processes.
Antioxidants are molecules that help neutralize free radicals. Some antioxidants are vitamins, such as Vitamin C and Vitamin E, but many others come from plant compounds like flavonoids, carotenoids, or polyphenols.
Aspect
Definition
Are they required?
Are all vitamins antioxidants?
Sources
ANTIOXIDANTS
Compounds that reduce oxidative stress
Not all are essential
No
Fruits, vegetables, herbs, teas, extracts
As research continues to expand, scientists are learning more about how antioxidants and vitamins work together across different metabolic pathways. Some antioxidants rely on vitamins to be activated, while certain vitamins require oxidative balance to function optimally. Understanding this interplay helps consumers make more informed decisions when choosing foods or supplements, highlighting that both components contribute distinct yet complementary roles in supporting overall health.
Harvard T.H. Chan School of Public Health: “Antioxidants.”
NIH: “Vitamins and Minerals Fact Sheets.”
Linus Pauling Institute, Oregon State University.