As the weather (hopefully) starts to get warmer, it's worth discussing the link between sun exposure and premature aging. The ultraviolet rays (U.V.) from the sun are the primary cause of premature aging. These rays can penetrate through clouds, which is why it's important to wear SPF all year round. There are a few different types of photo aging – let me break them down for you below:
·UVB radiation ‘B for Burning’ burns the top layer of your skin.
UVA radiation ‘A for Ageing’ goes deeper into the skin and causes premature aging.
Visible light radiation surrounds us and causes photo-aging damage by exposing skin cells to free radicals, deep into the dermis.
Infrared radiation is similar to visible light radiation, but it penetrates deeper into the skin layers, causing photo-aging. These rays are emitted by the electronic devices we use, such as mobiles, tablets, and computers. They have the deepest penetration of all the skin layers.
How do you know what SPF to use I hear you say?
There are two types of sunscreen, a physical sunscreen reflects the UV rays away from the skin whereas a chemical sunscreen works by absorbing the UV rays.
Physical sunscreens act as a barrier against UV rays by using minerals that naturally block UVA and UVB rays, deflecting the sun’s rays instead of absorbing them like chemical sunscreens. This helps protect sensitive skin from heat-triggered irritations like rosacea. Zinc oxide and titanium dioxide, which are the primary components of most physical sunscreens, have also been shown to be less harsh for those with sensitive skin. Physical sunscreen works quickly, making your skin ready for the sun as soon as it's applied. However, physical sunscreens are not waterproof by nature, so if you plan to swim, it may be best to opt for a chemical sunscreen. Additionally, if you have darker skin (Fitzpatrick 4-6), a physical sunscreen may cause a white cast effect, making your skin appear grey, so it's best to avoid this type.
Chemical sunscreens are products designed to absorb UV rays, convert them into heat, and release them from the body. Examples of common chemical sunscreen components include oxybenzone and octisalate. Chemical sunscreens are typically lighter and thinner than physical sunscreens, which makes them easier to apply. This characteristic makes them ideal for people who want to wear sunscreen under their makeup. However, individuals with sensitive skin are often advised not to use chemical sunscreen due to the increased risk of irritation. Chemical sunscreens also take about 30 minutes to start working, unlike the immediate results of physical sunscreens. Despite this, they are waterproof and sweat-proof, making them the better choice for sports or summer swims.
Most sunscreens are a combination of physical and chemical sunscreens to increase effectiveness.
My SPF Heroes
I have tried many SPFs in search of the perfect sunscreen that can be worn under makeup. Below are my recommendations. At the very least, sunscreen should be applied to areas that are constantly exposed to the sun, such as the face, neck, décolletage, and hands.
How much sunscreen do I need to use to be protected?
A question I get asked frequently by my clients is how much sunscreen should I apply to my face for it to be fully protected? The general rule of thumb is 1 teaspoon amount for your face and 7.5 teaspoon amount for your whole body.
Let's decipher some of the jargon!
SPF-‘Sun protection factor’ indicates how much UVB protection a sunscreen provides. UV star rating or PA + rating indicates how much UVA protection the sunscreen provides.
A sunscreen with an SPF of 30 and a UVA rating of 4 or 5 stars/PA ++++ or +++++ is generally considered a good standard of sun protection in addition to staying in the shade and clothing.
Additional suggestions to keep yourself safe in the sun
Remember to reapply sunscreen every two hours when you are out in the sun and try to avoid the hottest parts of the day, which are typically between 11 am and 3 pm. Don't forget to wear a hat and if possible, choose a wide-brimmed one to add a bit of glamour to your day. Wearing sunglasses is also important to prevent squinting and to protect the delicate skin around your eyes. After all, nobody wants to make their crow's feet worse!
In summary, exposure to sunlight can have positive effects on our health. Sunlight is a crucial source of vitamin D, which is necessary for maintaining healthy bones. Additionally, it can increase our levels of serotonin, which can improve our mood. However, it is important to note that excessive sun exposure can cause damage to the skin. To ensure you get the recommended amount of vitamin D, you may consider taking a multivitamin supplement instead.
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