Amchoor or aamchur or amchur, also referred to as mango powder, is a fruity spice powder made from dried unripe green mangoes and is used as a citrusy seasoning. It is mostly produced in India and Pakistan, and is used to flavor foods and add the nutritional benefits of mangoes when the fresh fruit is out of season.

Doogh, dhallë, ayran or tan is a cold savory yogurt-based beverage, popular across Western Asia, Central Asia, South Asia, Southeastern Europe and Eastern Europe. The principal ingredients are yogurt, water and salt. Herbs such as mint may be optionally added. Some varieties are carbonated.

Cream cheese is a soft, usually mild-tasting fresh cheese made from milk and cream. Stabilizers such as carob bean gum and carrageenan are often added in industrial production.

Fermented milk products or fermented dairy products, also known as cultured dairy foods, cultured dairy products, or cultured milk products, are dairy foods that have been fermented with lactic acid bacteria such as Lactobacillus, Lactococcus, and Leuconostoc. The fermentation process increases the shelf life of the product while enhancing its taste and improving the digestibility of its milk. There is evidence that fermented milk products have been produced since around 10,000 BC. A range of different Lactobacilli strains has been grown in laboratories allowing for many cultured milk products with different flavors and characteristics.
Kefir, is a fermented milk drink similar to a thin yogurt or ayran that is made from kefir grains, a specific type of mesophilic symbiotic culture. The drink originated in the North Caucasus, in particular the Elbrus environs along the upper mountainous regions of Circassia, Karachay and Balkaria from where it came to Russia, and from there it spread to Europe and the United States, where it is prepared by inoculating the milk of cows, goats, or sheep with kefir grains.

Oxalis montana is a species of flowering plant in the family Oxalidaceae known by the common names mountain woodsorrel, wood shamrock, sours and white woodsorrel. It may also be called common woodsorrel, though this name also applies to its close relative, Oxalis acetosella.
Ryazhenka or ryazhanka is a traditional fermented milk product in Ukraine and Russia. It is made from baked milk by lactic acid fermentation.

Sauerkraut is finely cut raw cabbage that has been fermented by various lactic acid bacteria. It has a long shelf life and a distinctive sour flavour, both of which result from the lactic acid formed when the bacteria ferment the sugars in the cabbage leaves. It is one of the best-known national dishes in Germany.

Sorrel, also called common sorrel or garden sorrel, is a perennial herbaceous plant in the family Polygonaceae. Other names for sorrel include spinach dock and narrow-leaved dock.

Sour cream or soured cream is a dairy product obtained by fermenting regular cream with certain kinds of lactic acid bacteria. The bacterial culture, which is introduced either deliberately or naturally, sours and thickens the cream. Its name comes from the production of lactic acid by bacterial fermentation, which is called souring. Crème fraîche is one type of sour cream with a high fat content and less sour taste.

Various sour soups, characterized by their sour taste, are known in various East Asian, Southeast Asian, and Slavic cuisines.
Sumac, also spelled sumach, is any of about 35 species of flowering plants in the genus Rhus and related genera in the cashew family (Anacardiaceae). Sumacs grow in subtropical and temperate regions throughout the world, including East Asia, Africa, and North America. Sumac is used as a spice, as a dye, and in medicine.
Tkemali is a Georgian sauce primarily made of cherry plum, sometimes alucha or other varieties of plum. Both red and green varieties of plum are used. The flavor of the sauce varies, but generally tends to be pungently tart. To lower the tartness level, occasionally sweeter types of plums are added during preparation. Traditionally, besides plum the following ingredients are used: garlic, pennyroyal, cumin, coriander, dill, chili pepper and salt.

Verjuice is a highly acidic juice made by pressing unripe grapes, crab-apples or other sour fruit. Sometimes lemon or sorrel juice, herbs or spices are added to change the flavour. In the Middle Ages, it was widely used all over Western Europe as an ingredient in sauces, as a condiment, or to deglaze preparations. It is still used to some extent in the American South.

Worcestershire sauce is a fermented liquid condiment created in the city of Worcester in Worcestershire, England during the first half of the 19th century. The creators were pharmacists John Wheeley Lea and William Henry Perrins, who went on to form the company Lea & Perrins. Worcestershire sauce has been considered a generic term since 1876, when the English High Court of Justice ruled that Lea & Perrins did not own a trademark for the name Worcestershire.

Yayık ayranı, also known as Turkish buttermilk, is a traditional Turkish drink produced from fermented buttermaking by-products, water and salt. It has been traditionally prepared in barrel churns or skin bags. Despite the similar name, it is distinct from ayran. Goat, sheep, or cow's milk can be used for Turkish buttermilk production. Certain acid curd cheeses such as çökelek could also be obtained from yayık ayranı when heated.

Yogurt also spelled yoghurt, yogourt or yoghourt, is a food produced by bacterial fermentation of milk. The bacteria used to make yogurt are known as yogurt cultures. Fermentation of sugars in the milk by these bacteria produces lactic acid, which acts on milk protein to give yogurt its texture and characteristic tart flavor. Cow's milk is the milk most commonly used to make yogurt. Milk from water buffalo, goats, ewes, mares, camels, yaks and plant milks are also used to produce yogurt. The milk used may be homogenized or not. It may be pasteurized or raw. Each type of milk produces substantially different results.