Download As research continues, one thing we know for certain is

SUNSCREEN AND SUNLIGHT
Sunlight is composed of packets of energy called photons. While the visible
colours of photons are harmless to our skin, it’s the sun’s ultraviolet light, the
invisible light, that causes skin damage. This puts skin molecules into an
energetically excited state and, as the saying goes, what goes up must come
down. When this acquired energy is released there are biological
consequences most notably in DNA damage and aging.
Ultra violet light destroys DNA, which, if unrepaired can lead to skin cancers.
We also know that UVA light destroys a structural protein called collagen. As
this collagen degrades our skin loses its elasticity and its smoothness, leading
to wrinkles. The good news is that these risks can be minimised by preventing
our exposure to UV radiation.
Today’s sunscreens employ UV blockers, molecules designed to scatter the
incoming rays such as titanium oxide and Zinc Oxide. These help reduce the
amount of UV rays that go through the skin surface. These oxides are
pulverised to the nanoscale, thereby greatly increasing their surface area to
best reflect the UV photons. Additionally, some antioxidant ingredients are
added to sunscreens and they include Vitamin C and E.
As research continues, one thing we know for certain is that protecting our
DNA from UV damage, for people of every colour, prevents skin cancers. The
American Cancer Society stresses that regular use of a sunscreen prevents
sunburn and reduces the risk of melanoma by 50 percent. We can still enjoy
being in the sun, but we should always be protected from the ultraviolet light.
https://www.scientificamerican.com/article/how-do-the-chemicals-in-sunscreen-protect-our-skin-fromdamage/