Nikita Gill (Your Soul is a River p12) isn’t employing poetic license when she writes ‘The Universe wove you from a constellation’ - our amazing bodies really are made from star dust. In an interview with National Geographic Iris Schrijver explains this beautifully:
our bodies are made of remnants of stars and massive explosions in the galaxies. All the material in our bodies originates with that residual stardust, and it finds its way into plants, and from there into the nutrients that we need for everything we do—think, move, grow.
Physics Central explains it much less succinctly and in more detail here