Citrus fruits Citrus fruits have citric acid. That’s what makes it taste sour. They are rich in Vitamin C that boosts immune system. Lemon and lime have highest concentration of citric acid.
Cherries Sour-sweet cherries pack a lot of flavor and health benefits. Studies show that it can lower uric acid by as much as 36% and can relieve muscle pain after exercise.
Tamarind Tamarind contains a lot of tartaric acid, which gives it the sour, tart flavor. Unripe tamarind is often used as a souring agent in soups.
Unripe mangoes Unripe mangoes are very sour. Many Asian cultures love to eat unripe mangoes, dipping each piece into salt, for a salty-sour treat that cleanses the palate.
Kimchi This staple in Korean cuisine—made from fermented vegetables or fruits—gained worldwide popularity after it was listed as one of the world’s healthiest foods. It contains probiotics which can improve digestion, lower cholesterol and inflammation, and boost the immune system. It also has antioxidants like beta carotene, which lowers risk for heart disease, stroke, cancer, and diabetes.