Spirit vinegar
Spirit vinegar is vinegar obtained through the acetic fermentation of ethyl alcohol of agricultural origin.
Acetic acid bacteria convert the alcohol mainly into acetic acid, which is responsible for its characteristic sharp sour taste.
The original alcohol may be produced from various agricultural raw materials, such as cereals, sugar beet, molasses or other fermentable sources, followed by fermentation and distillation.
The finished product is generally clear or almost colourless, with a relatively neutral aroma compared with wine, apple, rice or malt vinegar.
It consists mainly of water and acetic acid, while containing very small or negligible amounts of protein, fat and carbohydrates.
From a nutritional point of view, it is not a significant source of fibre, vitamins, minerals or polyphenols. Its main functions are acidification, flavouring and preservation.
Its acidity creates conditions that inhibit the growth of many microorganisms, making spirit vinegar particularly useful for food preservation.
The term refers to vinegar produced from distilled agricultural alcohol that subsequently undergoes acetic fermentation, rather than to vinegar that is distilled after production.
Calories
Spirit vinegar provides approximately 18–20 kcal per 100 ml, with slight variations depending on acidity and composition.
At normal seasoning amounts, its actual caloric contribution is therefore very low.
Uses in Food
It is used as an acidifying agent, seasoning and preservative in pickles, preserved vegetables, sauces, mayonnaise, ketchup, marinades and prepared foods.
Its relatively neutral flavour makes it particularly suitable when acidity is required without adding strong wine, fruit or malt notes.
It can be used to regulate food pH and contribute to microbiological stability.
It is also widely used in pickled vegetables, dressings, sweet-and-sour sauces and preserved foods.
Uses in Cosmetics
Food-grade spirit vinegar is not a common cosmetic ingredient.
Acetic acid and acidifying solutions may, however, be used in some formulations to adjust pH, particularly in hair-care and cleansing products.
Food-grade vinegar should not be considered equivalent to a purified and standardised cosmetic ingredient.
When used undiluted or at high concentrations, it may cause irritation to the skin, eyes and mucous membranes.
Allergens
Pure spirit vinegar is not among the major food allergens requiring mandatory declaration in the European Union.
Because the starting alcohol is distilled, proteins from the original agricultural raw materials are normally removed; however, any additional ingredients in the specific formulation should still be considered.
Assessment
A very low-calorie condiment that is technologically useful for its acidifying and preservative properties, but provides virtually no significant nutritional value.
Ingredient verdict: a useful neutral-tasting acidifying and preserving ingredient with minimal caloric contribution and no particular concerns at normal food-use levels.
Cons: high acidity; possible irritation if used undiluted
