Solskyddfaktorn säger inte mycket

Solskyddskampanjerna har börjat och många försöker nu att skrämmas med hudcancer och solbränna. Men vore det inte bättre att helt enkelt förklara hur det egentligen ligger till?  Med alla olika solskyddfaktorer och hur mycket skydd dom ger. Apotekets kampanj för i år lyder “Säkra upp sommaren med kvalitetssäkrade solskydd.  Tack vare vår noggranna kvalitetskontroll kan du vara helt säker på att de produkter vi säljer är bra. De har nämligen gått igenom en lång rad tester och kontroller för att hamna på våra hyllor”.  Låter tryggt tycker jag och läser vidare. Apoketet: Du blir inte snabbare brun om du struntar i solskydd – bara snabbare bränd. Faktorn säger en hel del om solkrämens förmåga att skydda mot UV-strålning och kan delas in i fyra kategorier: Lågt skydd (SPF 6–10), medelhögt skydd (SPF 15–25)högt skydd (SPF 30–50) och mycket högt skydd (SPF 50+). Fel! SPF 10  filtrerar bort 90 procent av UVB-strålarna och SPF 15  filtrerar bort 93 procent och SPF 30  filtrerar bort 97 procent, SPF 50 ger 98%. Som ni ser så kan man inte klassa in solskydden i medelhögt, högt och mycket högt skydd eftersom skillnaden i procent är obefintlig. Det är vilseledande att påstå detta då många tror då att SPF 50 ger mycket mer skydd än SPF 15 och så är inte fallet.  Apoteket: Om det till exempel står SPF 30 på förpackningen innebär det att du kan vistas i solen 30 gånger längre utan att bränna dig, jämfört med om du struntat i att smörja in dig. Solkrämer med riktigt låg faktor, SPF 6 eller lägre, ger inte ett tillräckligt effektivt skydd, och går därför inte igenom vår kvalitetskontroll. Fel! Ekvationen hur man räknar ut tiden som man kan sola säkert fungerar inte med solskyddfaktorer över SPF 10. Alla SPF över 10  korrelerar inte  procentuellt i UBV skydd. Se diagrammet som solkyddsindustrin inte vill att du ska känna till. Och så här säger en känd dermatolog som forskar mycket inom solskydd och hudcancer: “The high SPF numbers are just a gimmick,” Marianne Berwick, professor of epidemiology at the University of New Mexico. ”

Här ser du hur mycket UVB skydd som alla olika solkyddsfaktorer ger. UVB skyddar dig från att bli brännd.

Här ser du hur mycket UVB skydd som alla olika solkyddsfaktorer ger. UVB skyddar dig från att bli bränd. Så alla SPF över 10 ger nästan samma skydd.

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