The Health Benefits of Vinegar: Real or Imagined?

July 29, 2013 | By | Reply More

Flickr - Oil & Vinegar - susanvgSayer Ji, GreenMedInfo
Waking Times

Anecdotes about the health benefits of vinegar proliferate wildly, as do claims by skeptics that it is nothing more than placebo medicine. So, what does the scientific evidence actually say?

According to a recent review published in MedGenMed titled, “Vinegar: Medicinal Uses & Antiglycemic Effect,” which set out to examine the scientific evidence for the medicinal uses of vinegar, folklore concerning vinegar’s discovery stretch back to the very beginnings of recorded history:

Legend states that a courtier in Babylonia (c. 5000 BC) “discovered” wine, formed from unattended grape juice, leading to the eventual discovery of vinegar and its use as a food preservative.

This fascinating review describes the history of vinegar to be “as colorful as it is practical,” stating that, “Hippocrates (c. 420 BC) used vinegar medicinally to manage wounds and Cleopatra (c. 50 BC) dissolved precious pearls in vinegar and offered her love potion to Anthony.  Sung Tse, the 10th century creator of forensic medicine, advocated hand washing with sulfur and vinegar to avoid infection during autopsies.” Interestingly, vinegar “teas” were used by US medical practitioners of the late 18th century for ailments ranging from dropsy to poison ivy, croup, and stomachache,[1] as this was before the production and marketing of hypoglycemic patented medicines.

What Is Vinegar?

The word vinegar comes from the French vin aigre, meaning “sour wine,” and is a byproduct of fermenting a source of carbohydrates, grapes, dates, apples, berries, etc. The chemistry behind the process is described as follows:

Initially, yeasts ferment the natural food sugars to alcohol. Next, acetic acid bacteria (Acetobacter) convert the alcohol to acetic acid. Commercial vinegar is produced by either fast or slow fermentation processes. For the quick methods, the liquid is oxygenated by agitation and the bacteria culture is submerged permitting rapid fermentation. The slow methods are generally used for the production of the traditional wine vinegars, and the culture of acetic acid bacteria grows on the surface of the liquid and fermentation proceeds slowly over the course of weeks or months. The longer fermentation period allows for the accumulation of a nontoxic slime composed of yeast and acetic acid bacteria, known as the mother of vinegar.

It is the acetic acid which is responsible for the tart, biting, pungent flavors of vinegar, but the FDA states that acetic acid is not vinegar and should not be added to food products customarily containing vinegar products.[2] Vinegar actually contains a wide range of food components,[3] [4] including:

  • Vitamins
  • Minerals
  • Amino Acids
  • Polyphenols
  • Nonvolatile organic acids (e.g. citric, lactic, malic)

In this sense, vinegar is a complex food, irreducible to a singular compound it contains. This also may explain why it has such a broad range of potential medicinal properties. What follows is a list of health benefits associated with vinegar, as disclosed in the aforementioned review.

The Evidence-Based Health Benefits of Vinegar

  • Anti-Infective Properties: It was Hippocrates (460-377 BC), father of modern medicine, who first recommended using vinegar for treating sores and ulcerations. There is some modern research indicating that it does work as a disinfectant for household applications and as an antimicrobial for wounds (though it is not yet recommended by medical experts). One 1996 study on non-conventional topical treatments for wound care found it to inhibit Escherichia coli and group D Enterococcus, with lower but significant inhibitory activity on the growth ofStaphylococcus aureus and Pseudomonas aeruginosa bacteria.

  • Cardiovascular Protection: While there is no know published clinical research in humans showing that vinegar reduces blood pressure, animal research in spontaneously hypertensive rats does show it has a blood pressure lowering property.[5] This is believed to be due to vinegar’s ability to inhibit the renin-angiotensin system. [6] A proposed mechanism is that dietary acetic acid promotes calcium absorption and thereby downregulates the renin-angiotensin system. [7]Human research does bear testimony to the ability of acetate to increase the absorption of calcium in the distal colon,[8] lending plausibility to the view that vinegar might have similar calcium-mediated blood pressure lowering effects.  Additional research on the consumption of oil-and-vinegar dressing indicates that vinegar may lower other risk factors for cardiovascular disease.[9]

  • Anti-Cancer: There is a significant body of cell and animal research available today indicating that vinegar has anti-tumor properties.[10] [11] [12] [13] [14] [15]  Although the anti-tumor factors have not been identified, acetic acid appears to be a major player, as it forms acetate ions in the stomach, which may have direct anti-tumor effects.  As stated before, acetic acid alone cannot account for the health benefits of vinegar as a whole, and this is most evident by the fact that vinegar from various plant sources contain a wide range of polyphenols, whose antioxidant and anti-cancer properties are well characterized.

  • Blood Glucose Control: The first report of the blood-sugar lowering properties of vinegar were reported in 1988. Researchers found in rats, the blood glucose response to a 10% corn starch load was significantly reduced when co-administered with a 2% acetic acid solution.[16] Since then, a number of human studies have been performed indicating that vinegar will reduce both insulin response and blood sugar elevations following a meal.[17] [18] [19] [20] [21] [22] [23] [24]  One additional benefit of vinegar on blood sugar concerns is its ability to suppress appetite and improve satiety.[25] The review also points out that, “the lay literature has long proclaimed that vinegar interferes with starch digestion and should be avoided at meal times, indicating that it may lower the glycemic response to carbohydrates.[26]

Vinegar, without doubt, has far more health benefits than listed here. We should remind ourselves regularly that a lack of scientific proof does not constitute evidence that something does not exist, or is not real.  Direct experience, of course, is at the foundation of all scientific inquiry and clinical intuition. Owing to the status of vinegar as a food, and its extraordinarily high margin of safety, we can only hope that folks will not be dissuaded from using it as a tonic, or ‘natural remedy’ if that is what they freely choose.

About the Author

Sayer Ji is an author, researcher, lecturer, and advisory board member of the National Health Federation.

He founded Greenmedinfo.com in 2008 in order to provide the world an open access, evidence-based resource supporting natural and integrative modalities. It is internationally recognized as the largest and most widely referenced health resource of its kind.

[1] The Online Archive of American Folk Medicine. Available at:http://www.folkmed.ucla.edu/archive.html. Accessed March 3, 2006.

[2] US Food and Drug Administration. Acetic Acid – Use in Foods. Available at:http://www.fda.gov/ora/compliance_ref/cpg/cpgfod/cpg562-100.html. Accessed March 9, 2006.

[3] Morales ML, Tesfaye W, Garcia-Parrilla MC, Casas JA, Troncoso AM. Evolution of the aroma profile of sherry wine vinegars during an experimental aging in wood. J Agric Food Chem. 2002;50:3173–3178. [PubMed]

[4] Natera R, Castro R, Garcia-Moreno M, Hernandez M, Garcia-Barroso C. Chemometric studies of vinegars from different raw materials and processes of production. J Agric Food Chem. 2003;51:3345–3351. [PubMed]

[5] Kondo S, Tayama K, Tsukamoto Y, Ikeda K, Yamori Y. Antihypertensive effects of acetic acid and vinegar on spontaneously hypertensive rats. Biosci Biotechnol Biochem. 2001;65:2690–2694. [PubMed]

[6] Honsho S, Sugiyama A, Takahara A, Satoh Y, Nakamura Y, Hashimoto K. A red wine vinegar beverage can inhibit the rennin-angiotensin system: experimental evidence in vivo. Biol Pharm Bull. 2005;28:1208–1210. [PubMed]

[7] Porsti I, Fan M, Koobi P, et al. High calcium diet down-regulates kidney angiotensin-converting enzyme in experimental renal failure. Kidney Int. 2004;66:2155–2166. [PubMed]

[8] Trinidad TP, Wolever TM, Thompson LU. Effect of acetate and propionate on calcium absorption from the rectum and distal colon of humans. Am J Clin Nutr. 1996;63:574–579. [PubMed]

[9] Dietary intake of alpha-linolenic acid and risk of fatal ischemic heart disease among women.Hu FB, Stampfer MJ, Manson JE, Rimm EB, Wolk A, Colditz GA, Hennekens CH, Willett WCAm J Clin Nutr. 1999 May; 69(5):890-7.[PubMed]

[10] Mimura A, Suzuki Y, Toshima Y, Yazaki S, Ohtsuki T, Ui S, Hyodoh F. Induction of apoptosis in human leukemia cells by naturally fermented sugar canevinegar (kibizu) of Amami Ohshima Island. Biofactors. 2004;22:93–97. [PubMed]

[11] Nanda K, Miyoshi N, Nakamura Y, et al. Extract of vinegar “Kurosu” from unpolished rice inhibits the proliferation of human cancer cells. J Exp Clin Cancer Res. 2004;23:69–75. [PubMed]

[12] Shimoji Y, Kohno H, Nanda K, et al. Extract of Kurosu, a vinegar from unpolished rice, inhibits azoxymethane-induced colon carcinogenesis in male F344 rats. Nutr Cancer. 2004;49:170–173. [PubMed]

[13] Seki T, Morimura S, Shigematsu T, Maeda H, Kida K. Antitumor activity of rice-shochu post-distillation slurry and vinegar produced from the post-distillation slurry via oral administration in a mouse model. Biofactors. 2004;22:103–105. [PubMed]

[14] Hong FU, Ying Qiang SHI, Shan Jin MO. Effect of short-chain fatty acids on the proliferation and differentiation of the human colonic adenocarcinoma cell line Caco-2. Chin J Dig Dis. 2004;5:115–117. [PubMed]

[15] Augenlicht LH, Mariadason JM, Wilson A, et al. Short chain fatty acids and colon cancer. J Nutr. 2002;132:3804S–3808S. [PubMed]

[16] Xibib S, Meilan H, Moller H, et al. Risk factors for oesophageal cancer in Linzhou, China: a case-control study. Asian Pac J Cancer Prev. 2003;4:119–124. [PubMed]

[17] Ebihara K, Nakajima A. Effect of acetic acid and vinegar on blood glucose and insulin responses to orally administered sucrose and starch. Agric Biol Chem. 1988;52:1311–1312.

[18] Brighenti F, Castellani G, Benini L, et al. Effect of neutralized and native vinegar on blood glucose and acetate responses to a mixed meal in healthy subjects. Eur J Clin Nutr. 1995;49:242–247. [PubMed]

[19] Liljeberg H, Bjorck I. Delayed gastric emptying rate may explain improved glycemia in healthy subjects to a starchy meal with added vinegar. Eur J Clin Nutr. 1998;64:886–893. [PubMed]

[20] Johnston CS, Buller AJ. Vinegar and peanut products as complementary foods to reduce postprandial glycemia. J Am Diet Assoc. 2005;105:1939–1942. [PubMed]

[21] Leeman M, Ostman E, Bjorck I. Vinegar dressing and cold storage of potatoes lowers postprandial glycaemic and insulinaemic responses in healthy subjects. Eur J Clin Nutr. 2005;59:1266–1271. [PubMed]

[22] Sugiyama M, Tang AC, Wakaki Y, Koyama W. Glycemic index of single and mixed meal foods among common Japanese foods with white rice as a reference food. Eur J Clin Nutr. 2003;57:743–752. [PubMed]

[23] Johnston CS, Kim CM, Buller AJ. Vinegar improves insulin sensitivity to a high carbohydrate meal in subjects with insulin resistance or type 2 diabetes mellitus. Diabetes Care. 2004;27:281–282. [PubMed]

[24] Ostman EM, Liljeberg Elmstahl HG, Bjorck IM. Inconsistency between glycemic and insulinemic responses to regular and fermented milk products. Am J Clin Nutr. 2001;74:96–100. [PubMed]

[25] Ostman E, Granfeldt Y, Persson L, Bjorck I. Vinegar supplementation lowers glucose and insulin responses and increases satiety after a bread meal in healthy subjects. Eur J Clin Nutr. 2005;59:983–988. [PubMed]

[26] Shelton HM. Efficient Digestion. Available at: http://chetday.com/efdigest.html. Accessed April 11, 2006.

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