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You are here: Home » Fitness & Personal Wellness » Bath & Body » Lotions & Sunscreens » Sunscreens » The Good and the Bad of Sunlight

The Good and the Bad of Sunlight

The Good and the Bad of Sunlight

Ultraviolet Rays

The sun emits three ultraviolet rays: UVA, UVB and UVC
  • UVB = Burning and causes basal cell carcinoma and cataracts. UVB also has an important health benefit – It reacts with cholesterol in the skin to produceVitamin D.
  • UVA = Aging - responsible for deep skin wrinkling and possibly the worst kind of skin cancer - melanoma. As mentioned before these rays are out all day and penetrate windows, clothes and any sunscreen that is not full spectrum. For this reason, it is important to use sunscreen throughout the day and still plan on getting some afternoon sun.
  • UVC - Relatively little UVC reaches earth's surface
UVB produces Vitamin D
(see above)

Some of the conditions associated with Vitamin D deficiency:
  • Depression
  • Cancers: colon, breast, prostate and skin cancer
  • Infertility
  • Poor teeth development and cavities
  • Osteomalacia
  • Osteoporosis
  • Premenstrual Syndrome
  • Skin conditions – psoriasis and eczema
  • Rickets
  • SAD – seasonal affect disorder
  • Thyroid an adrenal disorders
Vitamin D Tidbits

  • Sunscreens block the production of Vitamin D. Sunscreens as low as SPF 8 have been shown to block the production of Vitamin D
  • Vitamin D is essential for good health. The UVB rays are strongest at noon or when the sun is directly overhead.
  • You can buy a UVA UVB monitor on our website.
  • Light skin people need 10-15 minutes / day of mid-day sun
  • Very dark skin people need up to 6 times more UVB rays to produce the same amount of vitamin D.
  • People over the age of 60 produce less vitamin D through their skin because skin thins as we age and so does its ability to synthesize Vitamin D
  • The best Vitamin D to take orally is D-3 or cholecalciferol according to Dr. Rhinehold Vieth a Canadian researcher and expert on Vitamin – D. D-2 or Ergocalciferol is less stable and less expensive which is one reason why it is used widely to fortify milk products etc.

    Skin Cancer

  • Basal Cell Carcinoma is the most common skin cancer. It does not metastasize and can be removed. If you have had significant sun exposure you have a good chance of developing this kind of cancer as you age. I advise wearing hats for this reason. The areas that I definitely do not want to develop more cancer are on my face.
  • Melanoma: This skin cancer can be deadly and is also associated with a history of heavy sun exposure with burning the skin and it can occur in anyone. The lighter the skin color the more skin cancer is possible. This cancer is now associated with the Alpha Rays that are out all day.
  • Squamous Cell Carcinoma: Second most common skin cancer. Usually superficial but can be invasive this cancer also it due to increased sun exposure and burning over the years.
  • Actinic Keritosis: Considered by some to be precancerous and if left untreated some will develop into sqamous cell carcinoma.




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