Retinol creams are plentiful, but I don't think I've seen this product's oil before. I purchased it due to its uniqueness. The effects were present. It is more recommended for dry skin. Skin type: ●Sensitive dry skin (congenital atopic dermatitis) > Extremely sensitive to ingredients, inflammation occurs within about 30 minutes if an unsuitable ingredient is used. Many natural ingredients cannot be used, such as rice, witch hazel, aloe, shea butter, jojoba oil (okay if wiped off immediately after use, but causes inflammation 5-6 hours later if left on). Just like food allergies (egg allergy, tomato allergy), the purer and more natural the ingredient, the more severe the breakouts. ●Reacts to clogging ingredients Even though it's dry skin, I have to use a toner for dry skin but a lotion for oily skin because of this. ●Chronic anemia Wounds take longer to heal compared to others. ◇Skin becomes darker rather than brighter with vitamin C and niacinamide. It is very difficult for my skin to improve due to various factors, and the recovery power is significantly lower when breakouts occur, so I have to be very careful when trying new ingredients. Therefore, I evaluate products quite meticulously. Experiment: As mentioned above, when I used niacinamide and vitamin C (including derivatives), my skin actually became darker. It seems I'm not the only one with this skin type. The reason why vitamin C, which is popularly known for its whitening effects, has the opposite effect on me is explained in a video by Chae-na on YouTube about vitamin C, so please refer to that. Since the two popular whitening ingredients had a negative effect on me, using the more potent retinol was a risky move. From November 20, 2024 to April 15, 2025, I applied one drop of retinol oil mixed with a moisturizer only on my left arm, which was covered by long sleeves, once every 2 days at night. My right arm only had the moisturizer applied. One of the reasons I bought the retinol oil instead of the cream is that my skin absorbs oil very well. This oil is very light, flows smoothly, spreads widely, and has a glossy finish. Even for oily skin, the light texture is not burdensome.After about 1 minute, the oil gets absorbed into the skin, leaving a glossy and soft finish on the surface, but the oily feeling is almost gone. There was no irritation at all. There was a faint floral fragrance that lingered for quite a long time. I wanted to upload photos, but since my skin recovers slowly, the color difference wasn't very noticeable, so I didn't upload them. My natural skin tone is a pink-based 21. If I had a skin with good cell turnover, just applying a lotion would theoretically help the color recover, but for me, the color doesn't come back and just stays the same when I apply lotion. When I get a tan, instead of becoming a nice orange-brown, the color turns more dull and grayish, not a vibrant tan. The skin darkens evenly from sun exposure, but when the color returns, it's like a TV screen that can't find the right channel - the dark and pale areas mix together. By April, about 30% of the skin had become pale (original color). It's kind of like a Dalmatian pattern... Even the brown areas don't just return to the original brown, but become a lighter brownish shade. Do other people's skin tones gradually lighten back to the original color?

Generally, retinol cream products (such as Strivectin) should be used in an amount the size of a rice grain, mixed with a moisturizing cream. Other retinol cream products are also recommended to be applied in small amounts spread over a wide area, rather than using a large amount. For this oil, what would be the recommended amount to use? Around 1 drop is recommended. 1 drop for the entire face. It is possible to spread 1 drop across the face. You can also gently press the oil after rubbing it evenly on the palms of your hands onto your face. The best way to apply it evenly is to mix it with a lotion and then apply. If you want to use retinol, you must apply sunscreen daily. If you don't normally apply sunscreen well, it may be better to not use retinol at all. If you only apply retinol and don't use sunscreen during the day, your skin may become darker and develop more freckles, similar to getting laser treatment for freckles without using sunscreen. While sunscreen products claim to last for hours, they get removed by oil and sweat, so you need to reapply even if you used a long-lasting sunscreen. It's very difficult to reapply in the middle of the day. The best method is to use a sunscreen stick or an SPF 50+ PA++++ pressed powder to maintain your makeup while reapplying sunscreen. Another method is to rub a mineral sunscreen into the palms of your hands and gently press it onto your skin. Since the product lasts 3 months, 20ml seems like a very large amount. You may not even be able to use 10ml completely. Since this is not a serum-type retinol product, using 1-3 drops seems like an excessive amount for the 20ml size. When using a 30ml serum daily, people typically finish it within 3 months. If used like a serum, you'd likely finish a 20ml bottle within 3 months, but using 1 drop on the face and body, the 20ml size seems too large. Just in case you try to use it like a serum, I've captured a photo of the recommended usage amount shown on the product. Since it will oxidize if left unused, just use it wherever you need retinol. The recommended amount is 1 drop per area!!! But there will still be some left over. The fragrance is strong. It seems like it may have been formulated with emulsification in mind from the beginning. Since it will be mixed into a lotion, the strong fragrance will only be temporary.Due to the large product size and strong fragrance, I gave it a rating of 4 stars instead of 5.

It's very important!!!!!! The usage period is 3 months. Using oxidized (deteriorated by air) oil will make your skin turn dark. Even if there is a lot of product left, you should boldly discard it. I also learned the period while writing the review and will boldly discard it! <How to dispose of cosmetics> Spray the liquid onto newspaper. After 1 day when the newspaper is dry, you can put it in the regular trash. Cosmetics contain chemical ingredients, so if you just pour them down the drain, it will pollute the water. Therefore, the best method for the earth is to evaporate them.

Although he was an intellectual, he did not feel that it was overly heavy.

The CosRX Retinol Cream worked well for me, so I bought it. I usually don't have issues with oils, but it did end up pilling. The effects were also quite good.