Last week, my wife who grew up in a hilltribe away from the modern world was using Gemini for this exactly. She found out that some face cream she bought was fake. I've been working with AI for the last 8 years. I didn't want to pollute her mind with AI and tech because I love the way she walks around thinking about fruit and trees and nature but she learned how to use AI by herself. She uses it for learning how to do things in "the city" like booking airplanes and hotels and asks Gemini questions all the time.
I hope you also tell her it's a liar. Sure it's useful for some things, but when it doesn't know, it'll just make shit up. It also peppers its answers with references now, but checking those refs will frequently show they offer no support at all to the AI's point.