AHA 편집하기

== AHA ==
알파하이드록시애씨드, 알파하이드록시산. 

함유율이 3% 미만으로 낮으면 보습제로 작용하고, 4% 함유율에 pH 3~4 이면 각질 제거 효과가 있다. 연구를 통해 증명된 가장 효과가 좋은 AHA의 형태는 글리콜산과 락트산이다. 사과산(malic acid), 구연산(citric acid), 타르타르산(tartaric acid)도 효과는 있지만 안정 성이 부족하며 피부 친화성도 떨어진다. 이들이 피부에 이롭다는 연구 결과는 없다. AHA 가 햇볕에 손상된 피부를 녹이기 때문에 AHA를 바르면 피부가 자외선에 민감해진다. 따 라서 자외선 차단제를 꼭 발라주어야 한다.


Alpha Hydroxy Acids (AHAs) are a group of naturally occurring and synthetic acids that are commonly used in skincare products for their exfoliating and skin-rejuvenating properties. 

These acids are derived from various sources, including fruits (such as citrus and apples) and milk.

그러나 화장품에 사용되는 AHA의 99%는 합성이다.

Some common types of AHAs include:

# Glycolic Acid: Derived from sugar cane, glycolic acid is one of the most popular and effective AHAs. It is known for its ability to penetrate the skin deeply and promote collagen production, making it beneficial for treating fine lines, wrinkles, and uneven skin texture.
# Lactic Acid: Found in milk and dairy products, lactic acid is milder than glycolic acid and is often used to improve skin hydration, texture, and overall tone. It can be a good option for individuals with sensitive skin.
# Citric Acid: Derived from citrus fruits, citric acid is known for its antioxidant properties. It can help brighten the skin and improve the appearance of dark spots and uneven skin tone.
# Malic Acid: Found in apples and pears, malic acid is another AHA that can provide gentle exfoliation and help improve the skin's texture.

AHAs work by exfoliating the top layers of dead skin cells, which can help unclog pores, reduce the appearance of fine lines and wrinkles, and improve overall skin texture and tone. They can also stimulate collagen production, leading to firmer and more youthful-looking skin.

It's important to note that while AHAs offer many skincare benefits, they can make the skin more sensitive to the sun, so it's crucial to use sunscreen regularly when incorporating AHA products into your skincare routine. Additionally, individuals with sensitive skin may need to start with lower concentrations of AHAs and gradually increase them to avoid irritation.

If you plan to use AHA products as part of your skincare routine, it's a good idea to consult with a dermatologist or skincare professional to determine the best approach for your skin type and specific concerns.
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