Can I use Retinol for a long time? What will happen if I use Retinol for a long time?

The retinol in the recent skin care craze of taking C in the morning and A at night refers to retinol, which can improve fine lines, wrinkles and photoaging. So can Retinol be used for a long time and what are the related products?

Can I use A-alcohol for a long time?

Retinol, also known as retinol, is a derivative of vitamin A, which includes retinol derivatives including retinol, retinal, retinoic acid, retinol acetate and retinol palmitate. Retinol promotes the formation of collagen and has great advantages in improving skin photoaging, fine lines, wrinkles and pigmentation.

Retinol is the gold standard for skin care products, but the higher the concentration, the better when it is added to skin care products. Retinol needs to be converted into retinoic acid within the cells to work, and retinoic acid is somewhat irritating to the skin, such as redness, dryness, burning, peeling, and itching. Therefore, when using retinol products, there must be a process of building tolerance, and the principle of concentration from low to high, and frequency from low to high must be followed.

Retinol enters the skin cells after being digested by the skin, and is finally converted into A acid to act by: accelerating the shedding of the stratum corneum, increasing the skin's basal metabolism, and accelerating the renewal rate of epidermal cells, thereby generally causing smoother skin. Retinol is very effective in promoting the conversion of collagen. It can act on the dermis to accelerate the production of collagen and prevent the formation of wrinkles. Acne on the face is best treated with A-substituted hydrocarbon ingredients, which are used to treat some skin inflammatory diseases, such as acne, keratosis pilaris and psoriasis.

Recommended concentration of A-alcohol products: 0.05% → 0.1% → 0.2%/0.3% → 0.5% → higher.

When you first start using retinol products, you need to use them alternately at night for at least two weeks. If there are no abnormalities on your skin, you can then advance to using them every night. After two weeks, if there is no abnormality, use it again in the morning and evening. It should be noted here that retinol is photosensitizing, so be sure to use sunscreen when using it during the day.

A alcohol products

1. ALPHA Hydrox Retinol Anti-Wrinkle Essence: 0.15% retinol combined with VC derivative ascorbyl palmitate. The vitamin E derivative tocopheryl acetate and the antioxidant bisabolol are used to soothe the irritation of retinol, but they are slightly insufficient. The emulsifier used is mild PEG-10 soybean sterol, and the preservative system uses parabens, methylparaben and phenoxyethanol. The texture of the cream makes the skin feel refreshing and moisturized, and the feeling of use is quite good. People with extremely sensitive skin should not try this easily.

2. CeraVe Retinol Essence: a typical niche series of big brands. CeraVe is a cosmeceutical brand under L'Oréal. It is a product strongly recommended by American dermatologists and is as famous as SkinCeuticals in the cosmeceutical industry. The retinol concentration of CeraVe Retinol Essence is estimated to be around 0.2%, and its irritation is one level higher than the previous one. However, CeraVe combined with niacinamide and ceramide complex (ceramide 1, ceramide 3, ceramide 6Ⅱ) has a certain relief effect. The high concentration of retinol is not so irritating.

3. Neutrogena Retinol Anti-Wrinkle Repair Night Cream: A brand under Johnson & Johnson, retinol is added under the protection of argon gas, and Johnson & Johnson spent a lot of money to build a production line for this. The concentration of this retinol is 0.2%, and it also contains original VC for antioxidant effects. Of course, the content is not too high. It also contains a hydrolyzed myrtle leaf extract, which can promote the absorption of retinol and enhance the effect of retinol. You can see that your skin tone brightens after using it for a week.

Long-term use of A-alcohol

A alcohol can stimulate collagen production, but don’t use it every day. You can use it 3-4 days a week. Because it takes time for Retinol to promote collagen production, and the skin needs time to rest because it has to work twice as hard under the stimulation of strong substances. When you first come into contact with retinol, it is best to use lotion or cream as a base! For example, Cerave's lotion, Eucerin Soothing Repair Cream, Yuze Repairing Lotion, Winona Special Cream... After you become tolerant, you can withdraw them appropriately and choose to apply less and thinner applications.

If high concentrations of retinol are used for a long time, it will easily lead to accelerated keratin shedding. If the skin's barrier function is incomplete, it will further damage the skin barrier, making the skin fragile and prone to redness, dryness, and peeling.

Long-term use of low-concentration A alcohol can effectively promote the renewal of keratinocytes and the production of collagen, thereby achieving the effects of removing wrinkles, fading spots, and rejuvenating the skin, effectively preventing skin aging. Long-term use of high-concentration retinol will cause the renewal of keratinocytes to be too fast, resulting in incomplete skin barrier function, the skin becoming thinner and thinner, moisture is easily lost, the ability to resist ultraviolet rays becomes weaker, the skin becomes more and more sensitive, and redness, dryness, peeling, etc. may occur easily.

In addition, retinol can cause the skin's light absorption rate to increase by 40%. If sun protection is not in place, ultraviolet rays will accelerate skin aging. Once you choose to use retinol, be sure to use sunscreen during the day.

C in the morning and A in the evening is good, but it is not suitable for everyone. Adenosine is irritating, and so is VC, especially the original VC. When two stimuli meet sooner or later, the stimulus of them will be more stimulating! You can stop using one of the ingredients and replace it with another that is gentler and more effective. Early C and late A means: early anti-oxidation + late anti-aging repair.