- make sure to apply it 15 to 30 minutes before going out into the sun
Another key to safe tanning is to keep your sunscreen topped up, especially if you’re going to be staying out for a while.
So remember to reapply 15 to 30 minutes after you start tanning, not the previous “every two hours” advice, as doing so will reduce your ultraviolet exposure from 60 to 85 percent that would be received compared to topping up your sunscreen were every two hours!8
Make sure you’re fully covered and re-apply whenever you get sweaty, after towelling or have been in the water.
But not alcohol, because you want your skin to be as hydrated as possible after a day being parched at the beach.
Make sure you stay hydrated by drinking plenty of water throughout the day.
Shade offers additional protection, so take regular breaks to allow your skin to escape the rays. Cover up with clothing – although UV light can penetrate clothes, they can help work as a filter against it.
Just remember to still keep your sunscreen topped up as you may still burn in the shade.
To avoid burning straight away, it’s best to stay out of the sun from 10am-3pm – this is particularly important if you have fairer skin.
Any time when the sun is shining outside of those hours, the sun’s rays won’t be as strong meaning you can have a better chance of tanning in a sustainable way.
Sunglasses are often designed to protect your eyes from UV damage, which may then lead to cataracts
And a sunhat is ideal for keeping the delicate skin on your scalp free from sunburn.
https://www.hollandandbarrett.com/the-health-hub/natural-beauty/skincare/suncare/seriously-need-know-safer-tanning/
- How long does sunscreen last?
“The FDA guidelines mandate that SPF directions must say to reapply every two hours when you are outdoors,” says Loretta Ciraldo, MD, FAAD, a board-certified dermatologist in Miami. “Remember that the AAD recommends a three-pronged approach to sun protection that includes wearing sun-protective clothing, as well as trying to avoid sun exposure during the peak hours of 10 a.m. to 3 p.m. daily.”
While waterproof sunscreen options are great for swimming or sports, it's worth noting that the FDA mandates these formulas can be labeled as water- and sweat-resistant for only up to 80 minutes. Because of this, Dr. Idriss recommends reapplying immediately after getting out of the water.
https://www.glamour.com/gallery/best-sunscreens#65b1889f8238d6734651490f
- What sunscreen should I use?
The American Academy of Dermatology (AAD) recommends that everyone use sunscreen that offers the following:
Broad-spectrum protection (protects against UVA and UVB rays)
SPF 30 or higher
Water resistance
A sunscreen that offers the above helps to protect your skin from sunburn, early skin aging,3,4 and skin cancer. However, sunscreen alone cannot fully protect you. In addition to wearing sunscreen on skin not covered by clothing, dermatologists recommend taking the following steps to protect your skin.
Seek shade. The sun’s rays are strongest between 10 a.m. and 2 p.m. If your shadow is shorter than you are, seek shade.5,6
Wear sun-protective clothing such as a lightweight and long-sleeved shirt, pants, a wide-brimmed hat, and sunglasses with UV protection, when possible. For more effective sun protection, select clothing with an ultraviolet protection factor (UPF) number on the label.
Use extra caution near water, snow, and sand as they reflect the damaging rays of the sun, which can increase your chance of sunburn.
When should I use sunscreen?
You should apply sunscreen every day on skin not covered by clothing if you will be outside. The sun emits harmful UV rays year-round. Even on cloudy days, up to 80% of the sun’s harmful UV rays can penetrate the clouds.9
How much sunscreen should I use, and how often should I apply it?
Apply enough sunscreen to cover all skin not covered by clothing. Most adults need about 1 ounce — or enough to fill a shot glass — to fully cover their body.
Don't forget to apply it to the tops of your feet, your neck, your ears, and the top of your head.
Apply sunscreen to dry skin 15 minutes before going outdoors.
Skin cancer also can form on the lips. To protect your lips, apply a lip balm or lipstick that contains sunscreen with an SPF of 30 or higher.
When outdoors, reapply sunscreen approximately every two hours, or after swimming or sweating, according to the directions on the bottle.
Broad-spectrum sunscreens protect against both UVA and UVB rays. What is the difference between the rays?
Sunlight consists of two types of harmful rays that reach the earth — UVA rays and UVB rays. Overexposure to either can lead to skin cancer. In addition to causing skin cancer, here’s what each of these rays does:
UVA rays (or aging rays) can prematurely age your skin, causing wrinkles and age spots, and can pass through window glass.
UVB rays (or burning rays) are the primary cause of sunburn and are blocked by window glass.
What type of sunscreen should I use?
The best type of sunscreen is the one you will use again and again. Just make sure it offers broad-spectrum (UVA and UVB) protection, has an SPF of 30 or higher, and is water resistant.
The kind of sunscreen you use is a matter of personal choice and may vary depending on the area of the body to be protected. Available sunscreen options include lotions, creams, gels, ointments, wax sticks, and sprays.
Creams are best for dry skin and applying on the face.
Gels are good for oily complexions and hairy areas, such as the scalp or male chest.
Sticks are good to use around the eyes.
Sprays are sometimes preferred by parents since they are easy to apply to a child’s skin. However, the challenge in using sprays is that it is difficult to know if you have used enough sunscreen to protect all sun-exposed areas of the body. To evenly cover the skin and use spray sunscreen safely, follow these tips:
Spray until your (or your child’s) skin glistens, then rub the sunscreen into the skin to get even coverage.
Do not apply spray sunscreen while you are smoking, near heat, or close to an open flame.
Avoid inhaling spray sunscreen by never spraying it around or near the face or mouth and not spraying it into the wind.
Some moisturizers and cosmetics have SPF. While these products are convenient, remember that sunscreen needs to be reapplied approximately every two hours when you’re outdoors.
In addition, keep in mind that while some sunscreens are water resistant, no sunscreen is “waterproof” or “sweatproof.” Sunscreen manufacturers are not allowed to use these terms, as they would be misleading. When using a water-resistant sunscreen, you should reapply it after swimming or sweating.
What is the difference between chemical and physical sunscreens?
The primary difference between these sunscreens is the active ingredients they contain. If the active ingredient in your sunscreen is titanium dioxide, zinc oxide, or both, you have a physical sunscreen. Dermatologists recommend physical sunscreens, also called mineral sunscreens, for people with sensitive skin.
If your sunscreen doesn’t contain titanium dioxide or zinc oxide, you have a chemical sunscreen.
Some sunscreens are called hybrids because they contain one or more active ingredients found in chemical and physical sunscreens. To see what active ingredients your sunscreen has, look at the section on the container labeled “Active Ingredients.”
Is a high-number SPF better than a low-number one?
Dermatologists recommend using a sunscreen with an SPF of at least 30, which blocks 97% of the sun's UVB rays. Higher-number SPFs block slightly more of the sun's UVB rays, but no sunscreen can block 100% of the sun's UVB rays.
It is also important to remember that high-number SPFs last the same amount of time as low-number SPFs. A high-number SPF does not allow you to spend additional time outdoors without reapplication. As many individuals only apply about 20–50% of the amount of sunscreen needed to achieve the amount of SPF on the label,10 application of high-SPF sunscreens helps to compensate for this under-application. Sunscreen should be reapplied approximately every two hours when outdoors, even on cloudy days, and after swimming or sweating.
Can I use the sunscreen I bought last summer, or do I need to purchase a new bottle each year? Does it lose its strength?
Dermatologists recommend using sunscreen on all skin not covered by clothing every day when you are outside, not just during the summer. If you are using sunscreen every day and in the correct amount, a bottle should not last long. If you find a bottle of sunscreen that you have not used for some time, here are some guidelines you can follow:
The FDA requires that all sunscreens retain their original strength for at least three years.
Some sunscreens include an expiration date. If the expiration date has passed, throw out the sunscreen.
If you buy a sunscreen that does not have an expiration date, write the date you bought the sunscreen on the bottle. That way, you’ll know when to throw it out.
You also can look for visible signs that the sunscreen may no longer be good. Any obvious changes in the color or consistency of the product mean it’s time to purchase a new bottle.
Avoid leaving sunscreen containers under direct sunlight, or in a hot environment such as inside of the car, as this will speed up the rate that sunscreen ingredients break down.
Will using sunscreen limit the amount of vitamin D I get?
Using sun protection may decrease your skin’s production of vitamin D. However, the AAD recommends that healthy adults should obtain an adequate amount of Vitamin D from a diet that includes foods naturally rich in vitamin D and/or foods/beverages fortified with vitamin D. This approach gives you the vitamin D you need without increasing your risk for skin cancer.
How do I treat a sunburn?
Your skin can burn if it gets too much sun without proper protection from sunscreen and clothes. To help heal and soothe stinging skin, it is important to begin treating sunburn as soon as you notice it. The first thing you should do is get out of the sun — and preferably indoors.
Once indoors, these dermatologists’ tips can help relieve the discomfort:
Take frequent cool baths or showers to help relieve the pain. Afterward, gently pat your skin dry.
Soothe your sunburn by applying moisturizer containing aloe vera or soy while your skin is still damp and whenever you feel discomfort. You can also apply calamine lotion, place a cool, damp washcloth on the affected area, or take a colloidal oatmeal bath.
Consider taking aspirin or ibuprofen to help reduce any swelling and discomfort from your sunburn.
Drink extra water. A sunburn draws fluid to the skin’s surface and away from the rest of the body. Drinking extra water when you are sunburned helps prevent dehydration.
Do not pop sunburn blisters. Blistering skin means you have a second-degree sunburn. Allowing blisters to heal — instead of popping them — protects you from infection. Keep blisters clean and apply petroleum jelly to protect them while they heal.
Protect your skin from the sun to prevent sunburn and reduce your risk of skin cancer and premature skin aging. Seek shade, wear sun-protective clothing — such as long sleeves, pants, a wide-brimmed hat, and sunglasses with UV protection. Apply a broad-spectrum, water-resistant sunscreen with an SPF of 30 or higher to all skin not covered by clothing.
https://www.aad.org/media/stats-sunscreen
There are two types of sunscreen filters: chemical and mineral. Chemical sunscreens use organic materials like oxybenzone, avobenzone, homosalate, octinoxate, octocrylene, and octisalate to offer sun protection. These work by absorbing the sun’s rays, turning it into heat, then releasing said heat through skin. This process takes about 15 minutes, so if you’re using chemical sunscreen filters, then you should be giving yourself at least that much time before heading outdoors. Because of their properties, chemical filters tend to be more cosmetically elegant and can be formulated into lightweight moisturizers and oils. There are a few drawbacks with chemical sunscreens. The first: They need to be applied more often than mineral sunscreens because they’re not photostable and break down upon exposure to UV light. Second, there have been studies suggesting that chemical sunscreen ingredients like oxybenzone and octinoxate can seep into water while you swim and bleach coral reefs. Some chemicals have been linked to endocrine disruption, although the data isn’t conclusive. Chemical sunscreens tend to be more irritating, as allergies to the active ingredients are more common.
Mineral sunscreens act as a physical barrier between you and UV rays, scattering the light when it hits your skin. There are two main ingredients that act as physical blockers — titanium and zinc oxide. These block a wide range of UV wavelengths and are photostable, meaning you don’t have to reapply as frequently (though you should still stick to the two-hour rule). Titanium and zinc oxide are well tolerated by all skin types, including sensitive, and less likely to cause a reaction. The zinc oxide is a key component in preventing hyperpigmentation, so it’s often recommended by dermatologists for patients with melasma or dark marks. In contrast to chemical sunscreens, physical filters aren’t as smooth or lightweight. They tend to leave a white cast on skin, which makes it challenging for deeper skin tones. Mineral formulas have come a long way thanks to zinc nanoparticles, which rub in more easily.
To get the benefits of both, you can opt for a hybrid formula, which contains chemical and mineral filters.
https://nymag.com/strategist/article/best-sunscreen-for-face.html
