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Wed Jul 25, 2007 10:24 am  |
Ladies, I wanted to wait until I used this sunscreen for at least one month before submitting my official review, thanks for your patience!
Ever since I was diagnosed with basal cell carcinoma, I've been on a quest to find the best sun protection I can. My initial search for sunscreens last November is what originally led me to the EDS forums, so I suppose it's been a mixed blessing! 
To the review....
The only downside to PSF SPF 50 sunscreen is that it's not completely physical. In order to market product as sunscreen and obtain the SPF number and testing, chemical ingredients must be included because the FDA doesn't recognize purely physical ingredients as sunscreen. Sad, but true. 
On to the positives!
1. I have used this every day for the last month and it has not clogged my pores!
2. I expected a product with such a high SPF to be heavy and greasy, but this is actually very light, although not quite as light as Clarins UV 40.
3. A slight white cast is left when first applied, but it eventually sinks in. This is very important on my no-makeup days when the only thing I wear is sunblock followed by Silken Pearl primer; I'm not into the geisha girl or goth look. 
4. My face is not left overly shiny after application, unlike so many facial sunscreens I've tried.
5. I swim in the pool every chance I get, and this is definitely more waterproof than Juice Beauty SPF 30 tinted moisturizer [other sunscreen I use]- I reapply after getting out of the pool just to be safe and it really goes on nicely when your skin is damp!
6. The price - $18 USD for 2 oz. I can't stand over-priced sunblocks, because then I feel like "conserving" a high priced product and won't use the amount I need for full protection.
7. Anecdotal benefit - A couple weeks ago when I got off work, my face was really oily looking because I forgot to use my Silken Pearl paste and primer that morning. I didn't look glowy, I looked oily yechhh! I still had a few stops to make on my way home and I didn't want to look like a trainwreck, so I applied a little bit of sunscreen right on top of my makeup. Complexion changed from oily trainwreck that desperately needs some blotting papers to a nice, glowy, dewy complexion we all strive for. I was quite floored! 
8. The ultimate method of testing the effectiveness of sunscreen is how it protects against incidental exposure. When I go to the pool, I remain in the shade. When I go to the beach, I wear a floppy straw hat so my face doesn't really get that exposed to the sun anyway. Hmmm, how can I REALLY test this product?
 In the interest of science, health and beauty; I applied it on my "driving arm". Like many Californians, I commute long distance just to get back and forth to work. Fortunately, I work from home most of the time but when I do drive, it's usually more than 30 miles. Unless the temperatures are absolutely SEARING HOT! or I'm stuck in traffic, I roll down the driver's side window while the AC is on full blast. Naturally, my left arm is exposed to a lot more sun than the rest of me and it invariably gets a lot more tan despite all the sunblocks I've been using. I mean, who wants one arm noticably tanner than the other?
Well, I can tell you that since I started using PSF sunscreen on my left arm, it has really and truly worked! Now the left arm is only slightly more tan than the right and I look a little more "balanced". 
Until I can find a purely physical sunblock that doesn't contain pore-clogging ingredients like coconut oil and shea butter, I'll continue to use PSF SPF 50; it's quite lovely and a great value as well.
Link to ingredients. It's a *.tif image, so I'm unable to copy and paste them below.
https://www.psfskincare.com/images/spf50_ing.gif |
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44 – combo/oily skin with a tendency towards clogged pores. Thanks to EDS, tweaked my skincare routine and normalized skin… no more breakouts. PSF, silk powder, Janson Beckett, Cellbone, NIA24 are staples. |
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The above post is a review of the following product available at EDS:
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PSF Pure Skin Formulations Facial Sunscreen Lotion SPF 50 (60 ml / 2 floz)
This lightweight sunscreen provides excellent protection against damaging UVA/UVB rays, while providing a natural, matte finish to the face. This oil-free formula also contains Titanium Dioxide, which acts as a physical sunblock to give immediate sun protection by reflecting the sun's rays away from the skin.
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Sun Aug 12, 2007 5:46 pm |
| iaimei wrote: |
| h.kitty wrote: |
I would also need to know if the titanium dioxide is micronized or not. |
Are you looking for micronized or non-micronized and why? Is it because non-mircornized means bigger particles to block more sun? A lot of products these days say they have this technology to micronize Zinc, but I don't know if its the same case with titanium dioxide. Isn't titanium dioxide considered toxic if it is absorbed into blood stream  ? |
In this particular formula if I saw that the titanium dioxide was non-micronized and in a high enough percentage I would be comfortable with the UVA protection of the product. Non-micronized means larger particles. When you micronize a particle of something you make it smaller. With ingredients like titanium dioxide or zinc oxide the smaller they become the more effective they become as UVB blockers but they become less effective as UVA blockers. With products like Z-cote which is micronized zinc oxide there is still adequate UVA protection despite the fact that it is micronized. (There are of course very fine Zinc Oxide products like ZinClear which I am not certain about when it comes to UVA protection but I have a feeling that they might not be VERY good at protecting from UVA-still looking into that one though.) Titanium dioxide is much less effective as an UVA filter when it is micronized. I personally classify micronized titanium dioxide as effective at filtering UVB and short wavelength UVA radiation (UVA II). I do not feel that micronized titanium dioxide is an effective UVA I filter. Of course, some may disagree with me on this but that is how I personally classify things.
Also, there is a titanium dioxide product called Optisol which is micronized but is coated and is supposed to offer better UVA protecion so if that is what PSF is using and it is in a high enough percantage then I would have to reconsider my comments about non-micronized vs. micronized. Yet I really do not know enough about the Optisol product to say if it offers good UVA protection. So at this point in time I could not say for sure that a product that contains this variety of Titanium dioxide offers acceptable UVA protection. I would need to find out more about Optisol to say for sure.
On the issue of micronizing zinc oxide vs titanium dioxide. The technology to micronize titanium dioxide does exist. I would actually say that a product that lists titanium dioxide is more like to contain a micronized version than a zinc oxide product. Although it seems that they are really starting to us more micronized zinc oxide these days so that may change.
I don't really know how toxic titanium dioxide would be if absorbed into the blood stream but it certainly sounds like something to avoid. I am not so sure that we do need to worry about micronized titanium dioxide or zinc oxide getting into the blood stream though. I have been studying this and my main concerns would be over the very, very small particles (around 20-30nm). Even then the evidence seems to support the safety of even those very tiny particles. Yet this is something that I am still looking into and I have not drawn a definite conclusion.
Here is a link to some good reading on physical sunscreen ingredients. It is only one source and there are many more but it does offer some good information.
http://www.ijdvl.com/article.asp?issn=0378-6323;year=2007;volume=73;issue=2;spage=80;epage=85;aulast=More#ref13
Of particular interest to what we have been discussing about particle size are the following charts from the above article.
http://www.ijdvl.com/viewimage.asp?img=ijdvl_2007_73_2_80_31890_1.jpg
http://www.ijdvl.com/viewimage.asp?img=ijdvl_2007_73_2_80_31890_2.jpg |
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