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organic acid : | malic acid |
CAS | 6915-15-7 |
Malic acid is an alpha hydroxy acid, which is said to be a natural exfoliator. It may be used to smooth wrinkles and fine lines, improve skin texture, cleanse pores, and improve overall skin.1 Because of this, malic acid has been used in various skincare products.
A small study published in 2013 found malic acid to be beneficial in the treatment of melasma, a common disorder marked by patches of abnormally dark skin. For the study, researchers assigned people with melasma to a skin-care regimen that included malic acid, along with vitamin C. At the end of the study, researchers concluded that using malic acid as a regular part of a skincare regimen could help improve the appearance of melasma.
Kidney stones are painful and can affect many people. Malic acid has been researched for its potential role in preventing and treating kidney stones.
In one preliminary study set in a lab, malic acid was found to increase urine pH levels, making kidney stone formation less likely. The researchers concluded that malic acid supplementation might help treat calcium kidney stones.
A 2016 review on the importance of a healthy diet to prevent kidney stones suggested pears could be a potential treatment option. Per the review, the malic acid in pears may be used to prevent the formation of kidney stones. This is because malic acid is a precursor for citrate, a compound that inhibits crystal growth in the kidneys.
The use of a 1% oral malic acid spray has been explored as a treatment for dry mouth.
One study evaluated people with dry mouth caused by antidepressants. Participants were randomized to receive either a 1% malic acid spray or a placebo. After two weeks of using the sprays as needed, those using the malic acid spray had improved dry mouth symptoms and increased rates of saliva flow.
Similar results were seen in a different study looking at malic acid for dry mouth caused by blood pressure medications. At the end of this two-week study, participants who used the 1% malic acid spray had less dry mouth and more saliva compared with the placebo group.
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