This Shrimp Sinigang Recipe is naturally gluten-free as it relies on fresh vegetables, seafood, and tamarind-based broth. However, to ensure it remains completely gluten-free, verify that the Knorr Sinigang sa Sampalok Mix Original and the fish sauce (patis) used are certified gluten-free. Some commercial brands may contain gluten-containing additives or flavor enhancers. When serving with dipping sauces, use gluten-free patis or opt for tamari as an alternative.