Comments on: Skin Care Myths: Adding Sunscreens Adds SPF

By: skin care

skin care — Sun, 11 Jul 2010 19:06:52 +0000

for me its a very informative information i am always very conscious about my skin.. i use a variety of thing to keep my skin healthy and i have found some useful tips on the skincare4style(dot)com site like using herbal and other home made thins for your skin..looking forward for more informative content form you. i am a free car manager.

By: Choosing Sun Screen

Choosing Sun Screen — Tue, 30 Sep 2008 07:17:44 +0000

I didn’t know this but I suppose it makes sense–the total SPF equals the SPF of the strongest sunscreen applied. But wouldn’t weaker sunscreens dilute the stronger one?

By: Caitmin

Caitmin — Tue, 10 Jun 2008 05:30:15 +0000

I never knew this – thanks.

I still like the multi-colored zinc used Australia – at least you can see its still there which is greats when your dealing with kids

By: Richard

Richard — Mon, 09 Jun 2008 03:06:49 +0000

In general, the above is true.

A note about SPF: SPF is on a logarithmic scale; there is a bigger difference between SPF 25 and SPF 30 than there is between SPF 30 and SPF 45. SPFs below 15 are basically worthless.

When I am on the water, I apply a sunscreen containing avobenzone, wait a few minutes, and then apply one containing zinc oxide and titanium dioxide. This seems to work well for me: My arms and legs (with just avobenzone sunscreen) get darker while my face (with both) doesn’t get darker at all.*

*A study has shown zinc and titanium to degrade avobenzone, but the time period was over a week and in aqueous solution. Avobenzone gets absorbed into the upper layers of the skin while titanium dioxide and zinc oxide don’t.