minimal UVR dose that causes clearly marginated redness in irradiated site 1

minimal UVR dose that causes clearly marginated redness in irradiated site (1 exposure)•Calculate SPF•Scale•2MEDbright erythema•4MEDpainful sunburn•8MEDsunburn with blisters•Sun Protective Factor (SPF 2-50+)degree of protection from sun is related to SPF•Protection against UVB•SPF= more effective in preventing a burn•SPF 6stay in sun 6x > it normally takes to burn•Max SPF 50+ lack of evidence with SPF >50 give better protection•“Broad-spectrum” if pass SPF and UVA protection in relation to UVB protection•BS with SPF >15 can claim to reduce skin cancer risk and early skin aging•Non- BS and BS SPF 2-14only UVB protectiononly claim to prevent sunburn•Ability to be effective during extended swimming, sweating exercising

•Cream-basedmore resistance to water removal than alcohol base•Water-resistanteither 40 or 80min when swimming or sweating•Not water-resistantmust state to wear water-resistant product while swimming or sweating•Cannot label: WATERPROOF, SWEATPROOF, SUNBLOCK•Cannot claim immediate protection on application or protection >2hours withoitreapplication without FDA approval•FDA recommends BS with SPF > 15•Dermatology recommends BS, water- resistant SPF >30 every day•Describe the different types of sunscreen •Chemicalfilm on skin which ABSORBS UVR and therefore block UVR transmission to epidermis•Aminobenzoic Acid & DerivativesUBV coverageno photosensitivity protection•Aka “PABA”not used oftensensitivity reactions•Derivative Padimate O•Anthram•Meradimateweak UVA2combined with other sunscreens to provide broader coverage•