❓Can vegetarians eat "meat flavor" additives made from mushrooms?

Yes, there really are "meaty" or "chicken-flavored" seasoning powders on the market made by fermenting or extracting flavor compounds from mushrooms (like shiitake) or yeast — these contain no animal ingredients at all and are safe. They're commonly found in mock meat products and the seasoning packets in vegetarian instant noodles, usually labeled as "flavoring (non-animal derived)" or something similar. That said, a small number of compound seasonings do add a bit of animal extract (like hydrolyzed animal protein or bone meal extract) to their formula to chase a more "realistic" meaty flavor, and it's hard to tell just from vague terms like "flavoring" or "flavor enhancer" on the label. It's best to check exactly what's listed in the ingredients. If it just says "flavoring" with no further detail and you're particularly concerned, look for a vegetarian certification mark on the product, or contact the manufacturer's customer service directly to ask about the specific source of that flavoring — that's more reliable than guessing.