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A fruit salt or fruit salts is an effervescent compound made up of organic acids such as
citric acid Citric acid is an organic compound with the chemical formula HOC(CO2H)(CH2CO2H)2. It is a colorless weak organic acid. It occurs naturally in citrus fruits. In biochemistry, it is an intermediate in the citric acid cycle, which occurs in t ...
or
tartaric acid Tartaric acid is a white, crystalline organic acid that occurs naturally in many fruits, most notably in grapes, but also in bananas, tamarinds, and citrus. Its salt Salt is a mineral composed primarily of sodium chloride (NaCl), a c ...
and salts such as sodium bicarbonate, sodium carbonate, or sodium bitartrate in combination with added flavoring and sugar. Historically, fruit salts were sold for a wide range of ailments, and today they are used primarily as
antacids An antacid is a substance which neutralizes stomach acidity and is used to relieve heartburn, indigestion or an upset stomach. Some antacids have been used in the treatment of constipation and diarrhea. Marketed antacids contain salts of alu ...
.


History

In the seventeenth and eighteenth centuries, scientists began uncovering the chemical make-up and physiological benefits of various salts such as
Glauber's salt Sodium sulfate (also known as sodium sulphate or sulfate of soda) is the inorganic compound with formula Na2SO4 as well as several related hydrates. All forms are white solids that are highly soluble in water. With an annual production of 6 mill ...
and
Epsom salts Magnesium sulfate or magnesium sulphate (in English-speaking countries other than the US) is a chemical compound, a salt with the formula , consisting of magnesium cations (20.19% by mass) and sulfate anions . It is a white crystalline solid, ...
. The fact that these were found in mineral springs led to the rise of
spa A spa is a location where mineral-rich spring water (and sometimes seawater) is used to give medicinal baths. Spa towns or spa resorts (including hot springs resorts) typically offer various health treatments, which are also known as balneothe ...
s, where people would go to bathe in and drink mineral-rich waters for their health. These developments led to attempts to replicate the salt mixtures found in these naturally occurring mineral waters using off-the-shelf ingredients. Mixing these kinds of salts — especially
carbonates A carbonate is a salt of carbonic acid (H2CO3), characterized by the presence of the carbonate ion, a polyatomic ion with the formula . The word ''carbonate'' may also refer to a carbonate ester, an organic compound containing the carbonate ...
and tartrates — with flavorings like lemon into an effervescent compound with citric or tartaric acid proved especially popular and set off a craze for the new "fruit salts". The name comes not from the popular fruit flavorings but from the fact that the acid in the mixture — which was then sourced from either citrus fruit (citric acid) or grapes (tartaric acid) — forms further salts such
monosodium citrate Monosodium citrate, more correctly, sodium dihydrogen citrate (Latin: ''natrium citricum acidulatum''), is an acid salt of citric acid. Disodium citrate and trisodium citrate are also known. It can be prepared by partial neutralisation of citric ...
in solution with the carbonates or tartrates. "Fruit salt" thus refers both to the fruit-derived salts formed in solution and metonymically to the mixture as a whole. In 1852, the British pharmacist James Crossley Eno started selling such a fruit salt mixture from his pharmacy in the port city of
Newcastle upon Tyne Newcastle upon Tyne ( RP: , ), or simply Newcastle, is a city and metropolitan borough in Tyne and Wear, England. The city is located on the River Tyne's northern bank and forms the largest part of the Tyneside built-up area. Newcastle is a ...
. Eno gave away his mixture to seafarers at the port, and in this way the name Eno became associated with fruit salts around the world. In 1868, he formally founded the company Eno's 'Fruit Salt' Works. Eno's success spawned many competitors in both Great Britain and the United States, including Abbey's Effervescent Salts, Dunn's Fruit Salt, Slaven's California Fruit Salt, and Dr. Edison Obesity Fruit Salts, for which in 1897 performer Alice J. Shaw became one of the earliest celebrity spokespersons for a weight loss product. In the style of
patent medicines A patent medicine, sometimes called a proprietary medicine, is an over-the-counter (nonprescription) medicine or medicinal preparation that is typically protected and advertised by a trademark and trade name (and sometimes a patent) and claimed ...
and
quackery Quackery, often synonymous with health fraud, is the promotion of fraudulent or ignorant medical practices. A quack is a "fraudulent or ignorant pretender to medical skill" or "a person who pretends, professionally or publicly, to have skill, ...
, they were advertised hyperbolically for an enormous range of diseases and ailments, only some of which they could ameliorate (e.g. indigestion). The range spanned from cholera to
gout Gout ( ) is a form of inflammatory arthritis characterized by recurrent attacks of a red, tender, hot and swollen joint, caused by deposition of monosodium urate monohydrate crystals. Pain typically comes on rapidly, reaching maximal intens ...
,
rheumatism Rheumatism or rheumatic disorders are conditions causing chronic, often intermittent pain affecting the joints or connective tissue. Rheumatism does not designate any specific disorder, but covers at least 200 different conditions, including ar ...
, colds, fevers, biliousness, indigestion, diarrhea, pimples, and headaches. As the pharmaceutical industry moved away from cure-all patent medicines in the mid twentieth century, Eno Fruit Salt became one of the few surviving products of its kind. Currently owned by
GlaxoSmithKline GSK plc, formerly GlaxoSmithKline plc, is a British Multinational corporation, multinational pharmaceutical and biotechnology company with global headquarters in London, England. Established in 2000 by a Mergers and acquisitions, merger of Gl ...
, Eno Fruit Salt is today sold as an antacid, and its main ingredients are now sodium bicarbonate, sodium carbonate, and
citric acid Citric acid is an organic compound with the chemical formula HOC(CO2H)(CH2CO2H)2. It is a colorless weak organic acid. It occurs naturally in citrus fruits. In biochemistry, it is an intermediate in the citric acid cycle, which occurs in t ...
. Its main market is in India.


References

{{DEFAULTSORT:Fruit salt Antacids Patent medicines