i have a stupid question but help me

Do you mean what is a dietary supplement?

Some type of nutrient supplement. Anything like a vitamin, protein powder, fish oil pills, fiber pills/drinks, etc.

let me google that for you....

Dietary supplements include a wide variety of both naturally-derived and artificially produced vitamins and other nutrients that could be missing in a person's diet.

They are distinguished from "drugs" or "medications" in that a dietary supplement cannot claim that it can be used to "diagnose, cure, mitigate, treat, or prevent a disease or condition."

Importantly in the US, while "drugs" and "medications" MUST be approved by the Food and Drug Administration before they can go on the market, "Dietary Supplements" do not need to be pre-approved by FDA before they can enter the market

A lot of stuff from Aamalaki to Zygophyllum tridentatum is out there on the market with all sorts of supposed benefits from reducing swelling of joints to increasing metabolism to increasing sexual performance to warding off chicken pox.

Most dietary supplements are unnecessary if one has a sufficiently healthy diet and the particular nutrients in these supplements are more easily absorbed by the body when they are eaten in the foods that naturally contain them