Protect Yourself from UV Ray

All radiation is a form of energy, most of which is invisible to human eyes. Ultraviolet (UV) ray is only one form of radiation and it is measured on a scientific scale called the electromagnetic (EM) spectrum.

Exposure to UVB ray actually is beneficial to human. it helps the skin to produce a type of Vitamin D (Vitamin D3), with calcium together play an important role in bone and muscle health. However, we shall not over expose under the sun, it might harm us instead of benefit us.

Sunscreen is important to prevent us from sunburn and other long term side effect such as skin cancer. Sun Protector Factor (SPF) indicates the protection of skin from UVB ray. It also indicates the level of UVB absorption, but this number does not increase exponentially. SPF 15 absorbs about 93.3% of UVB rays, but an SPF 30 only absorbs about 96.7%. The SPF number is double, but the absorption rate only increased by 3.4%. While for SPF 50 or and above, it only absorbs 98% of UVB rays.

The SPF number indicates protection only against UVB rays. High sunscreen SPF does not show any protection from UVA absorption by skin. Look for “broad-spectrum” or "PA++" label to ensure the most well-rounded sun coverage. Examples of active ingredients that provide UVA protection are avobenzone, zinc, and titantium. Bear in mind that there is no sunscreens which are water proof or sweat proof. Remember to reapply after you swim or sweat.

After choosing the correct sunscreen, it’s time to know how to apply sunscreen to get the greatest benefit. If you think to apply sunscreen directly before exposure to sun, it is a big NO. Sunscreen should be applied on skin 30 minutes before exposure. Reapply every 2 – 3 hours, sooner if excess water exposure occurs. 

No matter how high your SPF is, avoidance is the best! Wearing long sleeves, big hats, and staying inside during high sun times of 10am – 2pm are always useful.