If your poop smells like sulfur, the odds are that you are eating foods that have a high-sulfur content. Eating cruciferous veggies like broccoli, cauliflower, Brussels, asparagus, and cabbage could result in some unpleasant smelling bathroom experiences. Red meat, poultry, fish, pork, and eggs can all make your doodoo smell sulfur-y, too, along with dairy.
And if you love to add garlic and onions to your meal, you better believe they're going to make your poop stink too. You might love seasoning vegetables and meats with onions and garlic, but those can lead to sulfuric ass-id.