The full answer
Usually, but not guaranteed
Natural flavors are generally gluten-free, since the FDA requires wheat to be disclosed on labels if present. However, barley-derived flavoring agents don’t always need to be called out as explicitly, which leaves some room for uncertainty in less rigorously labeled products.
When in doubt
For products where “natural flavors” is the only detail given and there’s no gluten-free certification, contacting the manufacturer directly is the most reliable way to confirm — a small effort that avoids guesswork on the label-reading process.
Important context
Individual symptoms, reactions, medical histories, food products, and local labeling rules can vary. Community experiences are not medical evidence.
For personal medical decisions, diagnosis, testing, or treatment, consult a qualified healthcare professional.