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			<gallery>
			File:D-Gluconic_acid.png\|D-Gluconic acid
			File:3-Deoxy-D-manno-oct-2-ulosonic_acid_linear.png\|3-Deoxy-D-manno-oct-2-ulosonic acid
			File:Beta_D-Glucuronic_acid.svg\|Beta D-Glucuronic acid
			File:Tartaric_acid.svg\|Tartaric acid
			File:L-Ascorbic_acid.svg\|L-Ascorbic acid
			File:Beta_D-Glucuronic_acid.svg\|Beta D-Glucuronic acid
			</gallery>

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'''Sugar acids''' are organic compounds that belong to the larger family of [[carbohydrates]]. They are characterized by the presence of an aldehyde or ketone group (making them [[aldonic acids]] or [[uronic acids]], respectively) and one or more hydroxyl groups, along with a carboxylic acid group. These compounds play crucial roles in various biological processes and are found in a wide range of organisms, from bacteria to humans.

==Types of Sugar Acids==
Sugar acids can be classified based on their parent sugar molecule and the position of the carboxylic acid group. The two main types are:

* '''Aldonic acids''': Result from the oxidation of the aldehyde group of an [[aldose]] sugar to a carboxylic acid. Examples include [[gluconic acid]], derived from glucose, and [[galactonic acid]], derived from galactose.
* '''Uronic acids''': Formed by the oxidation of the primary alcohol group of a sugar to a carboxylic acid. Notable uronic acids include [[glucuronic acid]] and [[galacturonic acid]], which are derived from glucose and galactose, respectively.

==Functions and Uses==
Sugar acids have diverse functions and applications in both nature and industry:

* In nature, sugar acids are involved in the detoxification processes in animals, including humans, where glucuronic acid plays a key role in the conjugation and elimination of toxins.
* In plants, sugar acids are components of [[pectin]], a structural polysaccharide important in cell walls and intercellular spaces.
* Industrially, sugar acids are used in the production of [[ascorbic acid]] (vitamin C), biodegradable plastics, and various food additives. Gluconic acid, for example, is used in cleaning products for its chelating properties.

==Biosynthesis==
The biosynthesis of sugar acids involves enzyme-catalyzed oxidation reactions. For aldonic acids, the enzyme [[glucose oxidase]] can convert glucose to gluconic acid. Uronic acids are typically formed through the action of specific dehydrogenase enzymes that oxidize the terminal alcohol group of sugars.

==Health Implications==
While sugar acids are essential for various biological functions, their dietary intake and metabolism can have health implications. For instance, excessive consumption of ascorbic acid can lead to gastrointestinal disturbances, and imbalances in glucuronic acid metabolism can affect the body's ability to detoxify substances.

==Research and Future Directions==
Research into sugar acids continues to uncover their potential in medical, environmental, and industrial applications. Their role in the development of biodegradable materials and as intermediates in the synthesis of therapeutic compounds remains an area of active investigation.

[[Category:Organic acids]]
[[Category:Carbohydrates]]

{{Chemistry-stub}}

Sugar acid - Revision history

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