The stardust is a given. As for sunlight, all the energy including somewhat arguably geothermal (using the suns gravity to help form the earth and I guess radioactive material being formed by other stars) comes from the sun and gets converted into chemical energy you eat so you’re stardust animated by sunlight (mainly).
True, sometimes as a joke when I’m meeting someone for the first time I’ll say “omg it’s been so live since I’ve seen you, like nearly 13.8 billion years since we met last”.
Joke’s on you, you probably have drunk an incredible number of water molecules of that person’s recycled urine, particularly if they live anywhere nearby.
Also other organisms, i wonder if it’s safe to say all water is dinosaur piss or not