Mutum, kamar yadda aka sani, ya bayyana ne sakamakon sakamakon juyin halitta a yankuna masu dumi, inda yawan radiation na hasken rana ya yi yawa. Babu shakka, hasken hasken rana a cikin tsaka-tsaka a kan halayen fata yana da sakamako mai tasiri akan lafiyar dan Adam da kuma taimakawa ga ingantacciyar ingantaccen yanayi. Sakamakon radiation na hasken rana a kan mutane shi ne ya motsa matakai masu yawa na rayuwa, don kunna kare rayukan jikin, don inganta sauye-sauye zuwa yanayin yanayin muhalli. Lokacin da aka fallasa hasken rana a jikin mu, yana samar da bitamin D, wanda ya bada tsarin al'ada na alli da ƙwayar maganin phosphorus cikin jiki kuma ya hana ci gaba irin wannan cuta mai hatsari kamar yadda rickets. Sashin launin fata na asalin 'yan asalin Afirka shine kare kariya daga hasken rana mai tsanani, kuma kullun haske daga mazaunan arewacin arewa, maimakon haka, an daidaita su don kama wasu hasken ultraviolet (tun a cikin arewacin latitude saman duniya bai sami radiyon hasken rana ba).
Kamar yadda muka rigaya muka gani, hasken rana ba wai kawai yana kawo hatsari ga dan Adam ba, amma yana taimakawa wajen inganta yanayin zamanta, yana da tasiri a kan tsarin tsarin jiki. Duk da haka, wannan ba yana nufin cewa hasken rana ya zama abu marar laifi ba. Alal misali, haske mai zurfi, wanda ke rinjayar gabobin mu na gani tare da tsinkaye na kallo a rana mai haske, zai iya haifar da lalacewa na alamu na gani da kuma haifar da hangen nesa. A babban tsawo, akwai ƙara karuwa zuwa hasken ultraviolet. Sabili da haka, idan kuna ciyar da ranaku masu gudu a kan duwatsu, to lallai kuna buƙatar saka idanu masu aminci wanda zai kare idanunku daga mummunar radiation na hasken rana.
Bugu da ƙari, tare da nunawa mai tsayi a waje a rana mai zafi, akwai hadari na rudun ruwa. Don hana farkon wannan yanayin, wajibi ne a saka hat - hat, cap ko haske ɓoye.
A wasu lokuta ma, mutane suna iya samun wani abu na jiki na jiki yayin da ake nunawa ta hasken rana. A wannan yanayin, har ma da ɗan gajeren lokaci kuma ba shi da mahimmanci a kan fata na haskoki na rana, akwai rash a kan fata, mai laushi mai tsanani, da dadi da ciwon kai. A bayyane yake cewa ga mutanen da ke da irin wannan halayen da ba su da kariya a kan hasken rana ba zai iya cutar da lafiyar lafiyar jiki ba, to amma ba za a iya rage yawan zaman lafiya a wannan yanayin ba.
Hakanan, sakamakon radiation na hasken rana zai iya inganta ingantaccen abu, kuma ya tsananta ingancin hutunku lokacin hutu. Ana ciyar da lokacin kyauta a sararin samaniya, kada ka manta ka kula da tsananin radiation a yanzu. Idan ka yanke shawara ka dauki rana mai wanka, zai fi dacewa don wannan hanya don zaɓar safiya ko maraice (a wannan lokaci, hasken rana ba zai da tasiri a kan lafiyar).