You're probably not using enough sun cream. This is how much to apply

You’re probably not using enough sun cream highlights how ultraviolet (UV) exposure from the sun and tanning beds can damage skin at the cellular level. The article explains that UVA light (320–400 nanometers) penetrates deeper, destroying collagen and driving visible aging, while UVB light (280–320 nm) is the primary trigger for sunburn. It describes how UV photons push skin molecules into excited states, leading to reactive oxygen species and free radicals that can overwhelm antioxidant defenses and contribute to oxidative stress. By affecting DNA and cell signaling, UVA and UVB rays can cause mutations that may lead to non-melanoma and melanoma skin cancers. The piece links these mechanisms to wrinkles and age spots, emphasizing risk across all Fitzpatrick skin types.