Is Titanium Dioxide Safe In Makeup-Does Titanium Dioxide Protect Against Uva And Uvb
Titanium dioxide (TiO2) is a common ingredient in sunscreen products and is known for its ability to provide broad-spectrum protection against both ultraviolet A (UVA) and ultraviolet B (UVB) rays.
UVB rays are primarily responsible for causing sunburn and are the main factor in the development of skin cancers. UVA rays penetrate deeper into the skin and are associated with premature aging and skin damage, as well as contributing to the risk of skin cancer.
Titanium dioxide works as a physical or inorganic sunscreen, which means it reflects and scatters UV radiation away from the skin rather than absorbing it like chemical sunscreens do. It is particularly effective at reflecting UVB rays, but it also reflects a portion of UVA rays, providing some level of protection against both types of UV radiation.
However, the level of UVA protection offered by titanium dioxide alone might not be as high as that offered by some chemical sunscreens or by using it in combination with other UV-absorbing agents. For this reason, sunscreens that contain titanium dioxide often include other ingredients to enhance the UVA protection and to meet the requirements for broad-spectrum sunscreens as defined by regulatory agencies.
It is important to note that the particle size of titanium dioxide can affect its sunscreen properties. Nanosized particles of titanium dioxide may offer better transparency on the skin but have raised concerns about potential penetration into the skin and systemic exposure. Larger particles are less likely to penetrate the skin but may be less cosmetically appealing due to their whitening effect on the skin.
When using titanium dioxide-based sunscreens, it is essential to apply them generously and to reapply them as directed on the product label to maintain protection. Additionally, following other sun protection measures, such as wearing protective clothing, a hat, and sunglasses, seeking shade, and avoiding peak sun times, can further reduce the risk of UV-related skin damage.