is a high number SPF better than a low-number one?
Using a sunscreen with an SPF of at least 30, blocks 97 percent of the sun's rays. Higher-number SPFs block slightly more of the sun's rays, but no sunscreen can block 100 percent of the sun's rays. Currently, there is not any scientific evidence that indicates using a sunscreen with an SPF higher than 50 can protect you better than a sunscreen with an SPF 50
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. All sunscreens should be applied approximately every two hours if you are out in sun, even on cloudy days, and after swimming or sweating.
Sunscreen (also commonly known as sun screen, sunblock, sunburn cream, sun cream or block out) it is a topical product that absorbs or reflects some of the sun's ultraviolet (UV) radiation and thus helps protect against sunburn.
Skin-lightening products have sunscreen to protect lightened skin because light skin is more susceptible to sun damage than darker skin. Many imported sunscreens have ingredients which tan the skin. These products protect the skin through darkening of skin and therefore are not suitable for Indian skin.
Depending on the mode of action, sunscreens can be classified into physical sunscreens (i.e., those that reflect the sunlight) or chemical sunscreens (i.e., those that absorb the UV light).
Regular use of sunscreen can also slow or temporarily prevent the development of wrinkles and sagging skin.
Who needs sunscreen? Everyone. Sunscreen use can help in preventing skin cancer by protecting you from the sun's harmful ultraviolet rays. Anyone can get skin cancer, regardless of age, gender or race.
What sunscreen should I use?
Broad-spectrum protection (protects against UVA and UVB rays)
Sun Protection Factor (SPF) 30 or higher Water resistance
A sunscreen that offers the above helps to protect your skin from sunburn, early skin ageing and skin cancer.
Although sunscreens offer protection, they can not claim complete protection from cancer or other UV associated problems.