McVitie's Digestives Dark Chocolate

MALIC ACID is an organic compound with the molecular formula C4H6O5. Malic acid has two stereoisomeric forms (L- and D-enantiomers), though only the L-isomer exists naturally.

Polyglycerol polyricinoleate (PGPR), E476, is an emulsifier made from glycerol and fatty acids (usually from castor bean, but also from soybean oil). In chocolate, compound chocolate and similar coatings, PGPR is mainly used with another substance like lecithin to reduce viscosity. It is used at low levels (below 0.5%), and works by decreasing the friction between the solid particles (e.g. cacao, sugar, milk) in molten chocolate, reducing the yield stress so that it flows more easily, approaching the behaviour of a Newtonian fluid. It can also be used as an emulsifier in spreads and in salad dressings, or to improve the texture of baked goods. It is made up of a short chain of glycerol molecules connected by ether bonds, with ricinoleic acid side chains connected by ester bonds. PGPR is a yellowish, viscous liquid, and is strongly lipophilic: it is soluble in fats and oils and insoluble in water and ethanol.

Sodium carbonates (E500) are compounds commonly used in food preparation as leavening agents, helping baked goods rise by releasing carbon dioxide when they interact with acids.

Often found in baking soda, they regulate the pH of food, preventing it from becoming too acidic or too alkaline. In the culinary world, sodium carbonates can also enhance the texture and structure of foods, such as noodles, by modifying the gluten network.

Generally recognized as safe, sodium carbonates are non-toxic when consumed in typical amounts found in food.

Sodium hydrogen carbonate, also known as E500ii, is a food additive commonly used as a leavening agent.

When added to recipes, it releases carbon dioxide gas upon exposure to heat or acids, causing dough to rise and resulting in a light, fluffy texture in baked goods.

It is generally recognized as safe (GRAS) by regulatory authorities when used in appropriate quantities and poses no significant health risks when consumed in typical food applications.

AMMONIUM BICARBONATE is an inorganic compound with formula (NH4)HCO3, simplified to NH5CO3. Ammonium bicarbonate is used in the food industry as a raising agent for flat baked goods, such as cookies and crackers, and in China in steamed buns and Chinese almond cookies. It was commonly used in the home before modern day baking powder was made available.