Poppy seeds are the most famous imposters. They look like tiny black specks, almost like sand. If you had a lemon poppy seed muffin, congratulations, you’ve solved the mystery.
Sesame seeds are another prime suspect. They’re a little more teardrop-shaped. If you had a burger with a seeded bun, you’re looking at a very honest receipt for your lunch.
Flax seeds, especially the dark brown ones, can also play this game. And don't forget kiwi seeds. Those tiny black dots in a kiwi? They pass right through, saying “Je ne sais quoi” as they exit.
The Fruit and Veggie Gallery
Did you eat a fig? Figs are basically nature’s tiny seed bombs. You’ll see little crunchy bits floating around. It’s the fig saying, “I was here!”
Strawberries are a surprise. Their tiny seeds are on the outside. If you ate a whole pint, you might see a few of those little fellas saying goodbye. That’s normal, not scary!
Raspberries and blackberries are seed magnets. Each little juicy bump has a seed inside. Your body loves the juice, but the seeds get a one-way ticket out of town.
Stool Color Changes and What They Mean - Dr Gina Sims Gastroenterologist