Sun Lotion

The term “sun lotion” is sometimes used interchangeably with sunscreen, sunblock, sun tanning lotion and tanning screen. And yet each has a clear definition that is separate from the others.

Sun lotion is a term from the 1950’s used to describe products that keep the skin moisturized while enhancing tans.  In contrast, sunscreens were developed to absorb UVR, specifically UVB, before it could burn the skin.  Sun block refers to ingredients known as physical blockers, such as zinc oxide, that block suns rays from reaching the skin.  While all this seems confusing it is easy to understand if you focus on the second word in each term and remember that some products are designed to protect the skin whereas others are designed to promote tanning (harming the skin).

Lotions are liquids and generally contain moisturizers. While many sun lotions also contain screens or blocks, you must read the label to know which it contains. For sun protection, always look for a “broad spectrum” sun lotion that screens both UVB and UVA with a SPF of 30 or higher.

Screen means to filter out. This is done by chemicals that absorb ultraviolet radiation (UVR) before it penetrates the skin. Originally sunscreens only filtered out, or absorbed, UVB. Now broad-spectrum sunscreens filter both UVA and UVB. Sunscreen can be produced as lotions, gels, foams and sticks. While they may contain moisturizers, it may not be the main ingredient.

Block means to physically block out sunrays. To do this, ingredients must contain chemicals that reflect UVR away from the skin. These include zinc oxide, micronized zinc, and titanium dioxide. Sunblock usually comes in the form of a lotion or cream for easy application.

Today, many sunscreens contain a mixture of absorbers and/or reflectors. In recent years, as the importance of using these products has become better known, pharmaceutical companies have created new ways of delivering them. They are now available in sprays, creams, mousses, lotions, moisturizers, and hypoallergenic formulations, waterproof and sweat proof.