Foods that can help neutralize stomach acid immediately or provide quick relief from acid include:

• Bananas: Naturally alkaline and contain potassium and natural antacids that coat the stomach lining, reducing the burning sensation. They stimulate mucus production for extra protection.
• Cold milk: Contains calcium carbonate, a natural antacid that can absorb excess stomach acid and provide immediate soothing relief.
• Oatmeal and high-fiber foods: Oatmeal absorbs stomach acid and fiber-rich foods like whole grains, broccoli, and green vegetables improve digestion and reduce acid buildup.
• Cucumbers and melons (such as watermelon, cantaloupe, and honeydew): These water-based, alkaline foods help counteract stomach acid.
• Almonds: Raw almonds contain fats and antioxidants that may neutralize stomach acid and support digestive health.
• Ginger: Contains anti-inflammatory compounds that reduce acid production and soothe the stomach lining.
• Buttermilk and aloe vera juice: Help calm the stomach by neutralizing acid and reducing inflammation.
• Fennel seeds and chamomile tea: Aid digestion and soothe the stomach lining, reducing acid reflux symptoms.

Among these, cold milk and bananas are commonly noted for offering the quickest relief by directly neutralizing stomach acid or coating the stomach lining. Other foods like oatmeal, ginger, and aloe vera work well over time to reduce acidity and promote digestion. In summary, for immediate relief, try eating a ripe banana or drinking a glass of cold milk. For sustained management, incorporate high-fiber foods, alkaline fruits and vegetables, ginger, and soothing drinks into your diet. Avoid fatty, spicy, or acidic trigger foods to help reduce excessive stomach acid.