Best SPF Sunscreen To Use
Sun Protection Factor (SPF) is the measure of the ability of a sunscreen to protect your skin against UVB rays, the type that usually causes skin cancer and sunburn. Unfortunately, SPF does not measure how perfect a sunscreen can protect your skin from UVA rays, the type that is also dangerous and damaging to the skin. This article will disclose to you which SPF sunscreen to use, and how to use it.
Types of Sunscreens.
Physical sunscreen ingredients include titanium dioxide and zinc dioxide while chemical ones include cinnamates and para-amino benzoic acid (PABA).
Physical sunscreen ingredients scatter and deflect UV rays before they penetrate your skin. On the other hand, chemical sunscreen ingredients absorb UV rays and convert them into heat energy.
Both physical and chemical sunscreen ingredients are safe and effective if properly used. Your sunscreen of choice should be water resistant and able to effectively protect you against both UVA (Ultraviolet A) and UVB (Ultraviolet B) rays. Most broad spectrum sunscreens contain both chemical and physical ingredients. In most cases, at least three ingredients are combined like cinnamates, PABA, and zinc oxide.
Which SPF Sunscreen to Use, and How to Use it.
1. SPF 15 Sunscreens.
If it takes approximately 20 minutes of direct sun exposure for your unprotected skin to begin turning red, a SPF 15 sunscreen will theoretically prevent the reddening 15 times longer (300 minutes). In terms of percentage, the SPF 15 sunscreen blocks about 93 percent of all penetrating UVB rays.
2. SPF 30 Sunscreens.
SPF 30 sunscreens block approximately 97 percent of UVB rays from penetrating your skin. This simply means that out of 100 photons, only seven enter your skin.
3. SPF 50 Sunscreens.
SPF 50 sunscreens only permit 2 percent of photons to penetrate your skin. 98 percent of UVB rays are effectively blocked from penetrating your skin.
4. Above SPF 50.
Most dermatologists recommend the use SPF 15, SPF 30, and SPF 50 sunscreens. According to extensive scientific evidence, sunscreens with high SPF values, for instance, SPF 100 do not give any greater protection than SPF 15, SPF 30, and SPF 50. Furthermore, for effective broad spectrum protection, the UVA protection should be about 33 percent of the UVB protection. Sunscreens with a high SPF value offer a far greater UVB protection in comparison to UVA protection.
How to Use SPF 15, SPF 30 and SPF 50 Sunscreens.
For perfect protection, experts recommend applying approximately 2 milligram of sunscreen per square centimeter of your skin, and reapplying it for every two hours. Studies reveal that most people apply only a quarter to half of 1 Oz of sunscreen. This amount is lower than the recommended quantity. Also, a sunscreen should be applied a half an hour before direct sun exposure to permit fully binding of the ingredients to the skin.
Wrapping it up…
Sunscreens should be reapplied immediately after heavy sweating, swimming or after toweling off. It is also vital to check the ingredients used to formulate your sunscreen of choice to decide whether it works best for extended outdoor or for daily incidental use. Last but not least, check out for the seal of The Skin Cancer Foundation to ensure that your sunscreen meets the highest standards for effectiveness and safety.