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What is citric acid and what is it used for?

What is Citric Acid?

Citric acid is an organic compound naturally found in various fruits, particularly in citrus fruits like lemon or orange. One of its most relevant characteristics is that it functions perfectly as a preservative due to being a natural antioxidant.

How is it Obtained?

Commercially, it is available as a white, crystalline powder that is odourless and has a very sour taste. It can be extracted from different parts of plants, such as lemon juice, but nowadays, it is obtained through a fermentation process.

This process involves various substrates and microorganisms, with the most common being the fungus *Aspergillus niger*. Once the fermentation process is complete, citric acid is separated from the rest and subjected to a purification and crystallization process, resulting in the white powder used in various applications.

Characteristics of Citric Acid

It has well-defined and distinctive characteristics, including:

- White crystalline powder.
- Strong aroma and sour taste.
- Smooth texture.
- Compatibility with other substances.
- Use in cosmetics, food, medicine, chemistry, and photography.
- Antioxidant properties.
- Cleanser and protector.
- Effective analgesic.
- Reduces blemishes and skin pigmentation.



Uses of Citric Acid

In the Pharmaceutical Industry

It is used to manufacture healthcare products as it facilitates the metabolism of minerals in the body. It is also employed to provide effervescence and a citrusy flavour, especially in vitamin C supplements and fruit salts.

Other medical uses include:

- Preventing the formation of kidney stones and stimulating renal function.
- Combating infections.
- Reducing symptoms of gastritis, heartburn, and flatulence.
- Aiding in the treatment of general diseases and ailments.
- Used in the production of anticoagulants.

In the Cosmetics Industry

It is one of the most commonly used compounds to create beauty and skincare products as it correctly reduces pH and acts as an antioxidant. For these reasons, it is widely used in anti-spot cosmetics and depigmenting creams.


It is also commonly used in facial creams and body gels due to its antioxidant power. Exfoliants, in particular, benefit from citric acid as it removes dead skin cells without causing any damage or irritation.

Furthermore, it can help treat mild acne, pigmentation, clogged pores, wrinkles, and skin blemishes.

For all these reasons, it is a perfect ally to include in your daily routine, and an excellent way to do so is through Matcha & CO's Facial Glow Sérum.



It is a powerful, super-concentrated serum that combines the illuminating power of stabilized Vitamin C with the antioxidant power of Niacinamide and Matcha to hydrate, firm, and brighten your skin, reducing signs of aging.

It contributes to the formation of collagen, promotes skin hydration and brightness, and inhibits the tyrosinase enzyme responsible for hyperpigmentation and age spots.

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