Moisturizers Linked to Skin Care

“Four commonly used moisturizers -- Dermabase, Dermovan, Eucerin, and Vanicream -- increased skin cancers in mice previously exposed to UV radiation.” WebMD article
Moisturizers are oil in water suspensions, and like water they enhance the UV penetration to the skin. If they include filter layers that block or reduce the UV penetration, then this would not be the case. Look for moisturizers that include UV blocking ingredients such as Titanium Dioxide or Zinc Oxide. Also watch out for citrus and alpha and beta ingredients, as these will increase the penetration of UV, negating the use of blocking materials. Although highly recommended for elderly people, such beta materials such as carrot derived materials increase the penetration of UV radiation to the skin, increasing the opportunity for free radical production. Some skin creams include high concentrations of tocopherol (vitamin E) and ascorbic acid (vitamin C), which help to remove these free radicals, but the ascorbic acid at least, increases UV penetration. For light moisturizing look for the lightest weight materials and UV blocking materials, but for nightly moisturizing look for creams that include higher levels of free radical scrubbers. Avoid synthetic chemicals and limit exposure to the sun, or use moisturizers with very high levels of UV blocking materials. There is potential issues with any UV blocking materials, but clinical trials have yet to provide conclusive data on how much is too much, and which ones are the most dangerous in concentration. It should be common sense that any type of metal or heavy mineral should be used in moderation, as our bodies are not designed to process minerals of any type in large amounts.
Look for high quality all natural skin moisturizers that include these UV blocking materials in concentrations as such to be effective, but not overt. Also look at a skin care regiment that includes the use of skin creams that include high levels of scavenger materials for night time repair of daily damage. Also seek out products that can offer bi-weekly repair of the epidermis layers of the skin, such as clay based mask, and acid based scrubs. All of these are available from many manufacturers of all natural products, including the "Love, Gaia" line of all natural personal care products.