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Update time : 2020-08-04 18:21:36
What is AHA?
Citric acid is a member of α-hydroxy acid (or AHA) in the skin care industry. The most basic definition of HA is carboxylic acid, an organic acid contains at least one carboxyl group. However, this broad definition includes some unrelated substances such as retinoic acid, L-ascorbic acid and azelaic acid. Therefore, further restrictions (such as α, β, etc.) are required.
AHA is a non-scrub, leave-on exfoliant, more effective and gentler than traditional scrubs. Sun damage and excessive dryness of the skin can hinder the body's ability to clean dead skin cells normally. These obstacles can cause dullness, clogged pores, chestnut pimples, rough skin, and acne outbreaks. Using exfoliants can help the skin clear dead cells to make room for new healthy cells. Chemical exfoliants help prevent cracked pores and premature aging, and reduce the appearance of pores.
How does it affect your skin?
AHAs like glycolic acid and lactic acid can be incredibly powerful, and for people with sensitive skin, they can sometimes be too strong. And this is where citric acid is very helpful! Just like AHA for sports bra: Citric acid is not as powerful as other acids, but it is not originally prepared for mature girls who need strong support.
So what are the real benefits of citric acid for the skin? Citric acid (like almost all AHAs) can help brighten the skin, shrink pores, treat acne, and correct dark spots and fine lines.
Before starting to use it in exfoliating formulations, citric acid was used to control the pH range of skin care products. Since the normal pH of the skin is weakly acidic, the pH value of cosmetics and skin care products is very important. Low acidic pH may make irritating substances more irritating to people with sensitive skin.
Is it safe?
The terms "citrus" and "sour" are intimidating in themselves, and they are extremely frightening when put together. Especially when it comes to something to be used on the face! But according to The Derm Review, it is absolutely safe to use on the skin! "In 2014, the Cosmetic Ingredient Evaluation (CIR) expert panel reviewed scientific literature and data on the safety of citric acid and its salts and esters. These data show that the concentration of citric acid and its salts added in cosmetics and personal care products Salts and esters do not cause eye irritation, skin irritation or skin allergic reactions. Therefore, CIR concluded that the available scientific data indicate that citric acid and its salts and esters are used in cosmetics under current conditions And personal care products are safe."
Some people are frightened by citric acid because they know that lemon is very irritating to the skin. So, yes, you can absolutely not use citric acid, even though it is safe.
But be cautious, especially if you have sensitive skin. Citric acid can also affect the skin. Let's put it this way: How do you know if you are overusing? The side effects of overuse are tingling, burning and irritation.
If you are still unsure, always do a local test first to see how the skin reacts. If you can't observe any irritation or redness, you can slowly incorporate it into your daily skin care routine. Do not use AHA on the same night as vitamin A or physical exfoliants, because that will seriously damage the skin barrier!