It’s not just a marketing tactic ― real sourdough truly does seem to have potential as a gut health booster and may even benefit our blood sugar.But in a recent Instagram Reel, doctor Karan Rajan said that spending a little more on so-called sourdough bread may still be in vain. That’s not because the bread is secretly bad for you, he clarifies. Instead, the issue is with manufacturers who can slap the label on bread that doesn’t quite fit the criteria.“How can you tell the difference between real sourdough breads and fake ones?” he began his video.What’s the difference? The doctor said that differences in texture and appearance aren’t always enough to tell sourdough vs. non-sourdough breads apart. “The number one thing you need to do to see if you’ve got real sourdough is to check the ingredients list,” he added. Sourdough does not use dried, or instant, yeast in its dough. Instead, it relies on sourdough starter ― a funky-smelling pool of fermented flour and water that’s packed with wild yeast ― to rise in the oven. <