Baby Sun Care Benefits

Sunlight consists of a wide range of different wavelengths of radiation. Some of these we can sense – the warmth we feel in sunlight comes from Infra-Red radiation, and the light we can see comes from radiation in the visible spectrum. There are other wavelengths in sunlight that we can’t see, and chief among these are those in the Ultra Violet group. There are at least three different types of Ultra-Violet radiation and these are generally referred to as UVA, UVB and UVC.

UVC Radiation

Taking these in reverse order, UVC has the shortest wavelength and although it is potentially very harmful to our skin, it is completely filtered out by the earth’s atmosphere and so does not affect us.

UVB Radiation

UVB radiation is the one that causes the appearance of a tan after sun exposure. It does this by stimulating the formation of the pigment ‘melanin’ in the deeper layers of the skin and activates it’s movement to the outer skin layers. Here it acts as an antioxidant and skin protector – it is in fact part of our natural defence against sun damage.

UVB radiation also causes thickening of the outer layers of the skin, and if exposure is taken to excess is what causes sun-burn. This should be avoided at all costs, particularly by children, as it is thought that sun-burn in early years may lead to an increased risk of skin cancer later in life.

UVA Radiation

UVA radiation is potentially the most damaging form as it penetrates deeper into the skin. In the deep basal layers of the skin UVA can damage the DNA that makes up the blueprint of each cell, and can result in mutated cells that no longer reproduce properly. This in turn may be a primary cause of some skin cancers, although they may take years or even decades to manifest themselves.

UVA also damages structures made from or containing collagen and elastin and this is one of the main causes of wrinkles and premature ageing in skin that is often exposed to sunlight.

General Advice

The general advice given to adults who are going to be exposed to sunlight can be summed up in the now famous Australian adage of ‘Slip, Slop, Slap’ – Slip on a Shirt, Slop on a Hat, Slap on some Sun-cream. Clearly, all three of these actions are designed to reduce exposure to sunlight and therefore minimise the risks involved.

Further advice is to avoid exposure to the sun when it as its strongest – between mid-day and three in the afternoon. When you think about it, this is the traditional time when many Mediterranean countries have lunch followed by a Siesta – both taken indoors thereby avoiding the worst effects of the sun.

Baby Sun Screens and Sun Creams

And now a word or two about Sun-creams. All Sun-screens carry a Sun Protection Factor, usually abbreviated to SPF. This is followed by a number, generally between 4 and 25, although some products claim to go as high as SPF30 or more. OK, but what does this mean to the user.

Put simply, the higher the SPF value, the longer the user will be able to stay in the sun without visibly burning. As an example, if someone would normally start to burn after 15 minutes in the sun when unprotected, by using an SPF8 sun-cream they should be able to stay out for 2 hours without visibly burning. If they use a Factor 20 sun-cream, in theory they could stay in the sun for as long as 5 hours without visibly burning.

Sun-creams earn their SPF rating by including ingredients which filter out UV radiation and reduce it’s effect on the skin. Because it is UVB that causes most of the visible adverse effects of sun exposure, most commercial sun-creams concentrate just on filtering this out and pay little attention to UVA radiation. However, as already explained, it is UVA that does the most damage in the long term and which we need protection from.

It has been suggested that the use of sun-creams that only filter out UVB radiation has encouraged people to stay out in the sun far longer that they would otherwise do, and that this has unwittingly increased their exposure to UVA to such an extent as to lead to the dramatic increases in skin cancer that we are currently seeing. The moral of this has to be to only use sun-creams that filter out both UVB and UVA radiation.