Related by context. Frequent words. (Click for all words.) 71 UV exposure 71 UV radiation 68 ultraviolet radiation 68 UV rays 67 ultraviolet rays 64 ultraviolet light 62 UV light 61 harmful UV rays 60 cosmic radiation 60 UVB 58 harmful rays 58 UVB rays 56 UVA rays 56 electromagnetic radiation 55 vitamin D deficiency 54 ultraviolet UV 54 cosmic rays 54 ultraviolet 54 sun rays 54 ultra violet light 53 ionizing radiation 53 wear sunscreen 53 Sunscreens 53 radiations 52 infrared radiation 52 sun 52 oxidative damage 52 sunscreens 52 UV 52 water vapor 51 sunlight 51 sebaceous glands 51 vitamin D. 51 oxidants 51 ultrafine particles 50 rays 50 vitamin D 50 albedo 50 sunburns 50 sunburn 50 oxidative stress 50 radioactive decay 50 Vitamin D 49 methyl mercury 49 polycyclic aromatic hydrocarbons 49 ozone depletion 49 mid latitudes 49 skin cancers 49 radiation emitted 48 Sulfur dioxide 48 sunscreen 48 Vitamin D deficiency 48 ionizing 48 radiant heat 48 magnetic fields 48 ozone 47 hyperpigmentation 47 polar regions 47 outer layers 47 Skin Cancer 47 atmospheric carbon dioxide 47 geomagnetic storms 47 melanin 47 protective ozone layer 47 vitamin D intake 47 airborne pollutants 47 Sunspots 47 reactive oxygen species 47 tooth enamel 47 sunspots 47 radiation 47 reflectivity 47 Acrylamide 46 soot particles 46 polar caps 46 sunspot activity 46 sunshine vitamin 46 carotenoids 46 X ray emission 46 airborne particles 46 cosmic ray 46 riboflavin 46 indoor tanning 46 harmful effects 46 vitamin D deficient 46 solar flares 45 coral bleaching 45 ozone layer 45 AGEs 45 particulates 45 acrylamide 45 Earth magnetosphere 45 sunbeds 45 pre cancerous lesions 45 supernova explosions 45 harmful toxins 45 oxidizes 45 secondhand smoke exposure 45 pineal gland 45 tanning booths 45 burning fossil fuels