There are often many people use Cream instead of sunscreen, then the effectiveness of the two the same? Of course not! U.S. medical experts say care network is essentially different between the two, to a correct understanding of their effectiveness, in order to really achieve the purpose of scientific skin care.

Difference between the two

Cream color with the adjustment, the role of isolation make dust, to reduce free radical damage to the skin. Cream SPF if there is, then it also has a sunscreen, but most often Cream SPF only SPF20, PA + +; and sunscreen is a pure play the role of sun, high and low index. If not for a long period of outdoor activities, then do not have to use a sunscreen Cream, SPF can not be superimposed as Lego.

Use of time

After use in the cream, the last one for the skin care procedures. If both with Cream and sunscreen, the sunscreen on first, then with Cream.

SPF analysis

1, SPF Sun Protection Factor for the English abbreviation, that SPF is used to prevent the sun’s UVB. If SPF20 sun is 20 times the strength of a relationship does not assume the case of sunscreen 15 minutes under the sun began to skin erythema, then cast SPF20 sunscreen, you can ensure that she was 20 until after 300 * 15 = sunburn skin.

SPF value greater the longer the sun, sunscreen, the better, but the coefficient of the product often contains a lot of physical or chemical sunscreen, a larger number of skin irritation, easy to plug the pores, even the breeding of acne and acne, so do not blindly selection of products with high SPF value. General types of human skin, SPF value 8-12 is appropriate; light-sensitive people, choose between the SPF value of 12-20 can; in the wild, fun, beach swimming, human skin is completely exposed to the sun, value to be used in more than 30 SFP sunscreen; sensitive skin should choose sunscreen formulations plants to avoid chemical composition caused by allergic reactions. Use acid skin care products, sun protection factor should be higher with the physical sunscreen to prevent new skin hurt. Because the acid skin care products make the skin thinner, more fragile, impatient UV. The best selection of fair-skinned are more than 30 SPF sunscreen, to prevent the production of spots; darker skin who normally can use a SPF15 sunscreen.

2, PA for the Protection of UVA-1 in English abbreviation, but also refers to the SPF is used to prevent the sun’s UVA. Influence of UV on the skin, including UVA and UVB, which is caused by UV-A skin aging appear sin charm culprit, it is highly penetrating, it is glass and can not be separated, it can easily reach the dermal layer of collagen damage protein and elastin structure, over time leaving the skin wrinkles, yellowing and other signs of aging, so sun protection is more important task is to prevent the old skin is drying. It +,++,+++ to represent strength, usually, PA + effective protection for approximately 4 hours; PA + + effective protection for approximately 8 hours; PA + + + is super protective.

Sunscreen composition analysis

Sunscreen sunscreen ingredients can be divided into physical and chemical sunscreen. Physical sunscreen using a reflective particles in the skin to form a protective wall, the present composition are generally titanium dioxide and zinc oxide. Chemical sunscreen is to use chemical binding to the cell, to absorb a part of the effect of ultraviolet wavelengths. Two completely different ways, each was characterized. Physics particles do not need to use sunscreen to absorb, the burden on the skin will be relatively small, but significant drawbacks, such as larger particles, skin will be white, very greasy, suitable for people prone to allergies. Chemical sunscreen to absorb, so to apply after 20 minutes to play a role, generally transparent and refreshing, but some people are allergic to certain chemical composition will produce. Because a lot of material to UV absorption in the wavelength range broad enough, there are generally several chemicals together in order to absorb most of UV skin damage. Products on the market for more than 80% of the physical and chemical sunscreen together.

The sun is causing skin aging and the formation of spots on the skin surface of the main factors, skin care work do not have time, seasonal restrictions, always good sunscreen is a skin of a major project. Summer, the strong ultraviolet radiation, sunscreen to every two or three hours to apply again, and the eye of the sun Oh well.

Sunscreen can be divided into two categories

Physical sunscreen:

Is the use of physics, atomic particles that sunscreen is flaky, and when his face painted in the open when, like a mirror, reflect sunlight to reach the purpose of sun protection. Titanium dioxide and zinc oxide to belong to the physical sunscreen ingredients. They can form a protective film on the skin, making the UV can not penetrate the skin surface, which can be provide comprehensive UVB protection, which the zinc oxide to better block the UVA. Typical physical sunscreen ingredients white, paste, and after coming into contact with water turns blue. But this product has some limitations: for darker skin people, the polished effect may not be natural; for dry skin than the people who is not enough moisture; not suitable for general sun protection; must use makeup products to help removable clean.

Chemical sunscreen:

With chemical composition to the sun, sunscreen is the use of this principle to absorb the sun, as a light material, can absorb ultraviolet radiation, to make it into the molecular vibration or thermal energy to the effectiveness of sunscreen, such as amino acid and its derivatives, cinnamic acid. Applied to the face, the atoms absorb sunlight to prevent sun exposure to skin. In theory, physical sunscreen is better than chemical sunscreens, but most currently available chemical sunscreen.

How to choose people of different skin sunscreen products

Oily skin sunscreen choice: a strong penetration of water formulations, oil-free formula sunscreen, use fresh and not greasy, does not clog pores. Do not use sunscreen, physical sunscreen products with caution.

Acne-type skin sunscreen of choice: the same with oily skin, choose a strong penetration of water formulations, oil-free formula sunscreen, but when the more serious acne, skin inflammation or damage, we should suspend the use of sunscreen, go can only be used when the sun obscured by physical methods.

Dry skin sunscreen choice: be sure to use dry skin moist texture, and add the water and enhance skin immunity efficacy of sunscreen, many sunscreen sunscreen have been added outside the water, antioxidant effect.

Sensitive skin sunscreen choice: For security reasons, it is recommended to choose a professional for sensitive skin skin care brand of sunscreen, or the product description clearly the “allergy tested”, “children through clinical testing of dermatologists “” By ophthalmologist tested, “” fragrance free, preservative “and other descriptive text, choose the best physical sunscreen.

Note: The best way is to buy before the inside of his wrist in a try. 10 minutes if there is skin redness, swelling, pain, itching, shows that he has an allergic reaction to this product, you can try a lower SPF than the multiples of this product. If there are reactions, they have to give up the brand of sunscreen.

Spice Girls are the right choice for your sunscreen to the skin all-round protection from the sun, away from sunlight aging.