skin care myths

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Post on 23-Aug-2014



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Who doesnt want to know the secrets behind beautiful looking skin? Dr. Beyer, Dermatologist for Springfield Clinic, reveals the truth about healthy skin care. So often, many people neglect to take care of their skin properly. Please join Dr. Beyer, dermatologist for Springfield Clinic as she discusses skin care myths and what you should and shouldnt be putting on your skin.


  • Skin Care Myths: Separating Fact from Fiction Vivianne C. Beyer, MD Dermatology
  • Disclosures I have no conflicts of interest to declare
  • Objectives Discuss common myths, misconceptions, old wives tales Discuss the evidence that separates fact from fiction The following topics will be discussed: Skin cancer and prevention Tanning Vitamin D controversies Skin care and beauty tips Acne myths
  • Your Skin: A Vital Organ The largest organ Regulates body temperature Stores water and fat Is a sensory organ Prevents water loss and entry of bacteria It is essential to take care of this vital organ!
  • Myth # 1 Skin cancer only happens in older people
  • Fact: Melanoma is the most common form of cancer in young adults 25-29 years old Second most common form of cancer for 15-29 year-olds The incidence of nonmelanoma skin cancers, especially basal cell carcinoma, is rapidly rising in young adults
  • Skin Cancer Skin cancer is the most common form of cancer in the US More than 3.5 million skin cancers are diagnosed annually There are more new cases of skin cancer each year than there are cancers of the breast, prostate, lung and colon combined One in five Americans will develop skin cancer in the course of a lifetime Source:
  • Basal Cell Carcinoma Basal cell carcinoma is the most common form of skin cancer Main risk factor is cumulative and intense bursts of sun exposure About 2.8 million cases are diagnosed per year in the US Rarely metastasize but can be locally disfiguring/destructive Photo:
  • Squamous Cell Carcinoma The second most common form of skin cancer Main risk factor: cumulative UV exposure over the course of a lifetime An estimated 700,000 cases of SCC are diagnosed each year in the US Look like open sores, wart-like nodules, scaly red patches Have higher rate of metastasis than BCC (5%)
  • Melanoma One person dies of melanoma every 57 minutes About 76,000 cases of invasive melanoma are diagnosed every year in the United States More than 9,000 people died of melanoma in 2013 Melanoma accounts for less than five percent of skin cancer cases, but the vast majority of skin cancer deaths (75 percent) 1 in 50 men and women will be diagnosed with melanoma of the skin during their lifetime Source:
  • Myth # 2 Indoor tanning does not increase your chance of developing skin cancer
  • Tanning Ultraviolet radiation (UVR) is a proven human carcinogen One indoor UV tanning session increases risk of developing : squamous cell carcinoma by 67% basal cell carcinoma by 29% melanoma by 20% 76% of melanoma cases among 18-to-29-year-olds are due to tanning bed use People who first use a tanning bed before age 35 increase their risk for melanoma by 75 percent Source:
  • Whoa: Tanning beds cause more cancer than cigarettes! -Headline from
  • Results from a study published in JAMA Dermatology in January 2014: Roughly 450,000 cases of skin cancer each year are due to indoor tanning 360,000 cases of lung cancer are secondary to smoking In the US, 35% of adults and 55% of college students have tanned On an average day, more than one million Americans use tanning salons Wehner MR, Chren M, Nameth D, et al. International Prevalence of Indoor Tanning: A Systematic Review and Meta-analysis. JAMA Dermatology. 2014 Jan 19
  • Myth # 3 It is a good idea to get a base tan before a sunny vacation
  • There is no healthy tan Any tan is a sign of sun damage Base tan only offer SPF 3-4 Will not protect against burning Photo:
  • UV radiation facts UVA light penetrates deeper and causes photoaging (wrinkling, solar lentigines, large pores, blood vessels) Also contributes to development of skin cancer Intensity is constant throughout the day UVB light causes sunburn Strongest from 10AM to 2PM Tanning is induced by UVA (mostly) and UVB light Source & photo:
  • Source:
  • Myth # 4 You dont need sunscreen on a cloudy day
  • Dont learn this the hard way! Clear skies: 100% of UV light reaches Earths surface Scattered clouds: 89% Broken clouds: 73% Overcast: 31% UVA light is not affected much by cloud cover In addition, 50% of exposure to UVA occurs in the shade Jansen R., Wang S., Burnett M. et al. Photoprotection: Part I. Photoprotection by naturally occurring, physical, and systemic agents. J Amer Acad Derm.69(6):853.e1-853.e12.2013 Dec.
  • Myth # 5 Sunscreen only needs to be reapplied after sweating or swimming
  • Reapply! Every 2 hours After sweating, swimming, toweling off Regardless of how high the SPF is
  • How sunscreen works Chemical sunscreens absorb UV rays before they affect the skin Physical sunscreens reflect UV light away from skin zinc oxide and titanium dioxide
  • Sunscreen Facts SPF value refers only to protection gainst UVB (and small amount UVA) To achieve the full advertised SPF, must use 2 mg/cm2 (shot glass for entire body) 1 teaspoon for face/head/neck 1 teaspoon to each arm 2 teaspoons total to trunk 2 teaspoons to each leg Most people only use 25-50% of required amount Source:
  • Myth # 6 Using a higher SPF sunscreen means I can stay out in the sun longer
  • Chart of Sunscreen Efficacy An SPF 15 sunscreen blocks 93% of UVB radiation SPF 30 sunscreen blocks nearly 97% SPF 50 blocks 98% No suncreen blocks 100% of UV rays
  • Sunscreen Buying Tips Look for broad spectrum (UVA/UVB protection) For UVA protection, look for one of the following ingredients: avobenzone, titanium dioxide, ecamsule, oxybenzone, and zinc oxide SPF 30 Water resistant Do not use if past expiration date Store in cool space Source:
  • Myth # 7 Sunscreen causes Vitamin D deficiency
  • Facts about Vitamin D Vitamin D is important for skeletal health Current evidence does not support its role in the prevention of breast cancer, colorectal cancer, heart disease and stroke Institute of Medicine, 2010 There are 3 sources of Vitamin D: Diet Foods: fatty fish (salmon), cod liver oil, and fortified milk, cereal, and orange juice) Supplements UVB radiation Source:
  • Vitamin D Controversy Scientific evidence has NOT shown that sunscreen use prevents adequate vitamin D production Indoor tanning beds are primarily UVA, which does not increase Vitamin D production Vitamin D production reaches its maximum after 5 minutes in summer midday sun Source:,
  • Vitamin D Studies have shown that people with sun-seeking behavior (Australian surfers) still have suboptimal Vitamin D levels (under 50nmol/l) There is a significant genetic influence on Vit. D levels
  • Vitamin D Guidelines 400 International Units (IU) for infants under 12 months old 600 IU for children and adults younger than 70 800 IU for those 70 and older
  • Myth # 8 Sunscreens cause cancer
  • Do Sunscreens Cause Cancer? Oxybenzone, retinyl palmitate, and nanoparticles have come under scrutiny No studies have shown a cause and effect relationship Source:
  • Myth # 9 A product that combines sunscreen and insect repellant makes sense
  • Buy 2 Separate Products Combination products are problematic for a few reasons: 1) The sunscreen ingredient is less effective (for example, when combined with DEET) 2) The insect repellant is more toxic and more readily absorbed 3) Application instr