We recommend that you use this information for choosing suitable products, if you are not sure if the product is recommended, then you should consult with a specialist dermatologist or esthetician in a cosmetic salon.
Hidroxii products containing alpha-acids (glycolic acid, lactic acid, tartaric acid and citric acid) have become very popular over the past 5 years. There are many products that contain alpha-hydroxy acids. These products can be used to treat fine wrinkles, abnormal pigmentation and age spots and can help close dilated pores. The adverse effects of alpha-hydroxy acids include skin irritation and medium photosensitivity.
Therefore, it is recommended that you use sunscreen lotions, creams during the use of alpha-hydroxy acids. To avoid the appearance of skin irritation from alpha-hydroxy acids, it is recommended that you start with a product with low concentrations in the AHA. Application on the skin of alpha-hydroxy acids is done gradually, initially every other day, then reaching up to a daily application to the skin.
Salicylic acid has also been studied for its effects on premature skin aging due to exposure to ultraviolet radiation from the sun. This type of acid (used in aspirin as well) has exfoliating effects and can improve skin structure and coloring. It also acts in the hair follicle openings, in areas with high sebum secretion and thus it is highly useful in the treatment of acne. There are many products that contain salicylic acid. Some of them you can find in commerce (without prescription), others require a doctor's recommendation. Studies have shown that salicylic acid is less irritating than other products containing alpha-hydroxy acids, with a similar effect on improving the structure and color of the skin.
Vitamin C is the only antioxidant that stimulates collagen synthesis, which is essential because the production of collagen diminishes with age. Production of collagen is also lowered in the sunlight. Studies have shown that vitamin C helps diminish fine lines, scars and wrinkles. Products containing vitamin C should be chosen carefully. Vitamin C, in most of its forms is very unstable when it comes into contact with oxygen and becomes inactive. Also in many local applications vitamin C does not penetrate the skin sufficiently enough to act effectively.
People who want to use products based on vitamin C should consult dermatologists, to choose a suitable product. Use of kojic acid to treat disorders of pigmentation and age spots is a recently discovered method. Entering the market in 1989, kojic acid comes with effects similar to those of hydroquinone. It is derived from fungi (mushrooms) and studies have shown that it indeed has a depigmentation effect, inhibiting the secretion of melanin (brown pigment).