So are moisturizers with SPF enough?
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If I remember correctly from my biophysics classes in medschool (it's been, like, 7 years, argh); anything that is more than SPF 15 is pretty much the same; we would only need more than that if the rays coming from the sun got "stronger". Sorry, I cannot think of a good scientific way to explain this but I will try to remember better and come back. LOL
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it depends on the spf type and formula, some moisturizers can be better than specific sun products and vice versa.
One thing is very important to remember: never use these products sparesly if you want to achieve good protection level.
One thing is very important to remember: never use these products sparesly if you want to achieve good protection level.
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Originally Posted by Thais /img/forum/go_quote.gif If I remember correctly from my biophysics classes in medschool (it's been, like, 7 years, argh); anything that is more than SPF 15 is pretty much the same; we would only need more than that if the rays coming from the sun got "stronger". Sorry, I cannot think of a good scientific way to explain this but I will try to remember better and come back. LOL That's what i've heard as well, except, anything higher than SPF 30 is really just a gimmick. I don't recall the explanation!
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I ALWAYS wear sunscreen seperate from my moisturiser, regardless of whether the the moisturiser has SPF in it or not. I just can't take the risk with my pale skin.
I always use at least spf 30 all year round, spf 40 in summer. NZ has a harsher UV environment than the rest of the world, on account of the gaping hole in the ozone right over us, so spf 15 just doesn't cut it.
I always use at least spf 30 all year round, spf 40 in summer. NZ has a harsher UV environment than the rest of the world, on account of the gaping hole in the ozone right over us, so spf 15 just doesn't cut it.
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Paula Begoun says that to be truly protective, the sunscreen must contain ingredients that block UVA - titanium dioxide, zinc oxide, and avobenzone, and Tinosorb and Mexoryl SX. So don't just look at the SPF number, check the ingredients also. Here's a quote from Paula:
The sun produces a range of ultra-violet (UV) radiation. Skin damage, such as wrinkling, skin discoloration, sagging, and coarse texture, is a consequence of unprotected sun exposure due to the cumulative effect of the sun’s UVA and UVB radiation. UVA and UVB radiation are the portions of the sun’s rays that cause this damage. UVA rays have wavelengths of 320 to 400 nanometers; UVB rays have wavelengths of 290 to 320 nanometers. UVB radiation causes sunburn, while UVA radiation does not produce any visible short-term evidence of skin damage. Nonetheless, UVA radiation creates serious cumulative changes in skin that may be far greater than the sunburn caused by UVB radiation. Research has shown that unprotected exposure to UVA rays can, within one week, create distinct injury, such as inflammation, abnormal cell production, stratum corneum (outer layer of skin) thickening, depletion of immune-stimulating cells, and evidence of the possibility of elastin deterioration. (Sources: Journal of the American Academy of Dermatology, May 2001, pages 837–846; Bulletin of the Academy of National Medicine, 2001, volume 185, number 8, pages 1507–1525; Photodermatology, Photoimmunology, and Photomedicine, August 2000, page 147; and Journal of the American Academy of Dermatology, January 1995, pages 53–62.)
To be truly effective and beneficial for skin, sunscreens must protect skin from both the sun’s UVA and UVB radiation. In the U.S., there are only three ingredients that are widely found in SPF products approved by the FDA that protect across the full UVA range, these are: titanium dioxide, zinc oxide, and avobenzone (also called Parsol 1789 and butyl methoxydibenzoylmethane). Outside of the U.S., Tinosorb and Mexoryl SX (also called ecamsule), are also used. Mexoryl SX is a L’Oreal-patented sunscreen ingredient that received FDA approval in July 2006 for use in a single sunscreen, Anthelios SX SPF 15 from L’Oreal-owned line La Roche-Posay. This is the only sunscreen with Mexoryl approved for sale in the U.S. (Sources: International Journal of Pharmaceutics, June 2002, pages 85–94; Photodermatology, Photoimmunology, Photomedicine, August 2000, pages 147–155 and Search the Web and Skin Therapy Letter, Volume 2, Number 5, 1997 and FDA Approves a New Over-the-Counter Sunscreen Product.)
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The sun produces a range of ultra-violet (UV) radiation. Skin damage, such as wrinkling, skin discoloration, sagging, and coarse texture, is a consequence of unprotected sun exposure due to the cumulative effect of the sun’s UVA and UVB radiation. UVA and UVB radiation are the portions of the sun’s rays that cause this damage. UVA rays have wavelengths of 320 to 400 nanometers; UVB rays have wavelengths of 290 to 320 nanometers. UVB radiation causes sunburn, while UVA radiation does not produce any visible short-term evidence of skin damage. Nonetheless, UVA radiation creates serious cumulative changes in skin that may be far greater than the sunburn caused by UVB radiation. Research has shown that unprotected exposure to UVA rays can, within one week, create distinct injury, such as inflammation, abnormal cell production, stratum corneum (outer layer of skin) thickening, depletion of immune-stimulating cells, and evidence of the possibility of elastin deterioration. (Sources: Journal of the American Academy of Dermatology, May 2001, pages 837–846; Bulletin of the Academy of National Medicine, 2001, volume 185, number 8, pages 1507–1525; Photodermatology, Photoimmunology, and Photomedicine, August 2000, page 147; and Journal of the American Academy of Dermatology, January 1995, pages 53–62.)
To be truly effective and beneficial for skin, sunscreens must protect skin from both the sun’s UVA and UVB radiation. In the U.S., there are only three ingredients that are widely found in SPF products approved by the FDA that protect across the full UVA range, these are: titanium dioxide, zinc oxide, and avobenzone (also called Parsol 1789 and butyl methoxydibenzoylmethane). Outside of the U.S., Tinosorb and Mexoryl SX (also called ecamsule), are also used. Mexoryl SX is a L’Oreal-patented sunscreen ingredient that received FDA approval in July 2006 for use in a single sunscreen, Anthelios SX SPF 15 from L’Oreal-owned line La Roche-Posay. This is the only sunscreen with Mexoryl approved for sale in the U.S. (Sources: International Journal of Pharmaceutics, June 2002, pages 85–94; Photodermatology, Photoimmunology, Photomedicine, August 2000, pages 147–155 and Search the Web and Skin Therapy Letter, Volume 2, Number 5, 1997 and FDA Approves a New Over-the-Counter Sunscreen Product.)
Link Ingredient Dictionary: U
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No - you need to use a sunscreen on top of that of least a spf of 30 every day - rain or shine - even if you don't go outside, because the sun still comes through your windows.
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Originally Posted by Thais /img/forum/go_quote.gif If I remember correctly from my biophysics classes in medschool (it's been, like, 7 years, argh); anything that is more than SPF 15 is pretty much the same; we would only need more than that if the rays coming from the sun got "stronger". Sorry, I cannot think of a good scientific way to explain this but I will try to remember better and come back. LOL oooh really? so maybe i should just stick to spf15 moisturizer. they're much easier and less expensive to find
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Keep in mind that moisturizers are tested to achieve their SPF rating. They have to provide the same level of protection as a sunscreen of the same SPF rating. UVA & UVB protection are different, though, and you do want the most UVA protection you can get.
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Originally Posted by vanilla_sky /img/forum/go_quote.gif it depends on the spf type and formula, some moisturizers can be better than specific sun products and vice versa. One thing is very important to remember: never use these products sparesly if you want to achieve good protection level.
Good point, I've heard that at least with makeup (I'm not sure about moisturizers), you have to really pile on the makeup to get the amount of SPF on the label, and most people don't wear that much much makeup! So a second sunscreen will never hurt!
Good point, I've heard that at least with makeup (I'm not sure about moisturizers), you have to really pile on the makeup to get the amount of SPF on the label, and most people don't wear that much much makeup! So a second sunscreen will never hurt!
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Originally Posted by Thais /img/forum/go_quote.gif anything that is more than SPF 15 is pretty much the same; we would only need more than that if the rays coming from the sun got "stronger". I read that on skincare book, I forgot what's the name of the book.We just need to reapply the SPF product often.
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Originally Posted by girl_geek /img/forum/go_quote.gif Good point, I've heard that at least with makeup (I'm not sure about moisturizers), you have to really pile on the makeup to get the amount of SPF on the label, and most people don't wear that much much makeup! So a second sunscreen will never hurt! it can get tricky, since ingridients in one sunscreen can destabilize ingridients in another sunscreen
thus it's best to use one product with spf, just making sure it is stable and you put a lot of it!
