Choosing the Best Sunscreen With so many different types of sunscreen on the store shelf, how do you know which one is best for you? There are several considerations when deciding which product is best for your lifestyle and your skin.
The labels on sunscreen can contain the following terms:
Broad-spectrum - This sunscreen protects against both UVA and UVB rays.
PPD - Persistent Pigment Darkening - measures how well a sunscreen protects against UVB rays. Although there is no standardized numbering system for PPD, generally, the higher the number, the greater the protection. In some countries the number is replaced by a plus sign; the more plus signs, the greater the protection.
SPF - Sun Protection Factor - the higher the number, the greater the protection against the sun’s UVB rays. SPF’s are usually between 2 and 60. The American Academy of Dermatology recommends using at least an SPF of 15. This number indicates how well the sunscreen blocks UVB rays only. This number tells you how long you can be in the sun without burning, for example, if you normally burn in 15 minutes and you choose an SPF of 20, you would multiply 15 by 20 to get 300. You should be able to stay in the sun for 300 minutes before burning.
UVB - Ultraviolet B - the sun’s rays that can cause skin cancer
UVA - ULtraviolet A - the sun’s rays that are responsible for aging of the skin and overexposure to UVA rays can also cause skin cancer
Lifestyle and Other Considerations
In addition to looking at the different terms on the sunscreen you will need to take your lifestyle, skin type and planned activities into account.
If you are going to be in the water, choose a sunscreen that states “waterproof” rather than “water resistant.” Generally, water resistant sunscreen will offer up to 40 minutes protection while waterproof will offer up to 80 minutes of protection from the sun while you are in the water.
If you will be sweating during activities, choose at the very least a water resistant sunscreen. Sweat, like water, can dilute the sunscreen on your skin.
If you have oily skin or are prone to acne, choose a sunscreen that has an oil-free base.
People with sensitive skin may want to use a pure zinc-oxide sunscreen which can be gentle on the skin and rarely causes irritation.
Make sure your sunscreen in fresh. Sunscreen ingredients become less effective with time. You may want to throw out any sunscreen you purchased last summer and purchase new bottles for the upcoming season to make sure you are properly protected.
Choosing a lotion or spray is purely a personal decision. Both are effective if you have chosen the correct SPF and PPD protection for your activities. You may, however, find you have a preference to using one over the other based on convenience.
Choose the SPF based on how long you will be in the sun. Although the higher the number the better the protection, you don’t necessarily need the highest SPF you can find. A general rule of thumb may be to use SPF of 30 on days you will be outside for a few hours and an SPF of 40 or more if you plan to be outside for more than a few hours.