My derm's sunscreen had been used infrequently... and i only learnt about PAO recently. The PAO is 6 months. i opened it on 7/2/2016
it contains pure minerals sunscreen and i have only kept it in a cool dark cupboard.Any idea if it is ok to use. i forget how long i had it for. probably a year! Is it ok to use?
Your skin can show an allergic reaction under influence of sunlight in combination with external substances like sunscreen actives, from all allergic testings it appears some uv filters give more problems than others (benzophenone-3 is a common one). Maybe you can search the following terms on google: PACD, photoallergic reaction, contact allergy, sunscreen. Many articles will explain what you want to know.
@ preciousia - I actually live on the East Coast of the US. Our climate is very moderate here, not terribly hot in the summer and not terribly cold in the winter. We have traveled to some very hot and humid climates and I found the Blue Lizard to be just as good a product in those situations as it is here.
Thank you for your suggestions about sunscreen products, such as uncover and derma. However, it seems it is unaccessible to these European products for American people. Do you have any recommendation sunscreen that could be easily accessible for American?
As far as I can see the data in the article is complete. You may have noticed that Zinc Oxide is not allowed as UV-filter, just like some older filters like PABA and Cinoxate.
This is what they said about he moisturiser containing lemon
"According to our medical team, it is unlikely that citrous limon will cause photosensitivity, firstly due to the minute amount that is in the formulation and secondly due to the fact that this product is a sunscreen, so hypothetically speaking, if citrous limon was photosensitising, the effect would be attenuated by the sunscreen."
First of all that's complete nonsense what they say about the lemon extract, if it's photosensitizing (which it is) it will cause problems under influence of UV-light.
Well I don't know what the following ingredients are: Exasperse Black R3619 , Exasperse Brown R3622 , Exasperse Russet R3236 , Exasperse Tan R3620, Exasperse Yellow R3235, so I can't say much about that.
The other ingredients seem to be okay, although Diazolidinyl Urea isn't a very good preservative.
@Peter yup... hogwash indeed! Citrus ingredients even at Low % will affect photo sensitivity
Koreans use lots of weird ingredients we are unfamiliar with in the Western world!
Preservatives are necessary... I don't know much about them tbh. Personally I use phenoxyethanol in my DIY as I noticed them used in my derm's products. Not for the purist but easier to formulate with than the "natural" preservatives
Looks like only the moisturiser has Urea... so the other 3 are ok
I am not sure how I feel about their Zinc Oxide that isn't coated tho the Australia TGA says it is safe
Urea is actually a good ingredient, Diazolidinyl Urea is a formaldehyde releasing preservative, something you don't want in your cosmetics. Phenoxyethanol is actually allowed in "natural" cosmetics.
A lot of controversy surrounds the safety of diazolidinyl urea. Many believe it to be both toxic and carcinogenic, mainly due to the fact that it's a proven formaldehyde releaser. However, the Cosmetic Ingredient Review (CIR) Expert Panel evaluated the available data on this ingredient (and reevaluated it in 2006) and concluded it as safe to use on cosmetic products at a maximum concentration of .5%. Their studies demonstrated it to be neither toxic nor photosensitizing. However, tests did show it to produce mild skin irritations in some (1 out of 1000), so this ingredient should probably avoided by those with very sensitive skin.
Yeah well, from all preservatives I believe the following are the worst ones:
methylchloroisothiazolinone/methylisothiazolinone
quaternium-15
2-bromo-2-nitropropane-1,3-diolaka (AkaBronopol)
diazolidinyl urea
imidazolidinyl urea
DMDM Hydantoin
But I don't think any cosmetic product is really dangerous. With the allowed concentrations, the side effects of all cosmetic ingredients are most of the time so extremely minimal. But for example with the sunscreen filters, I think you are certainly able to say some have fewer side effects than others. And in that view, I don't get it why companies still want to use some filters (like Benzophenone-3 or Homosalate). The FDA is simply too slow with admitting new filters, although the FDA does some very strict testing which also has it advantages.
Well they appear to be safe at the allowed concentrations, and certainly Methyl and Ethylparaben are the least worrying. But personally I rather use other preservatives, because there have been some studies indicating parabens may induce skin damge under influence of uv-light. And there is still some concern about the endocrine disrupting properties of Propylparaben and Butylparaben. For a complete overview you could read the complete opinion on parabens in this article:
I don't think parabens are a big problem either, as you say preservatives are a necessary evil. But a product that has gone bad is even worse for your skin. Personally I avoid the 6/7 preservatives I mentioned on 31 october, and concerning parabens, well if they are in a rinse of product it's no problem. I did find some other sunscreens from Ultrasun btw.
@Peter well said. The beautybrains had said this many times too. I rather a product is preserved than a product that goes bad and causes more harm than good! Just what you said to.
Will take note of the preservatives you mentioned. Thank you again for sharing your knowledge.
Ectoin is also a very good active which protects against sun damage (https://www.ncbi.nlm.nih.gov/pubmed/15452409/). The other ingredients are probably added at low concentrations 0.01-0.1%, so it's nice the product doensn't contain irritants, is packaged airless and is well preserved, but I guess you can't expect much from the antioxidants.
I must say my sunscreen list is quite abbreviated. Really you could write a book of 100 pages on every sunscreen. But still, the more I read, the more I think the list is okay in general:
Avoid:
- Octocrylene (easily absorbed by skin, forms free radicals, allergy rates are rising, after certain amount of time it generates more free radicals than no sunscreen)
- Homosalate (hormone disruptor, easily abo
- Benzophenone-3 (strong allergen, very easily absorbed by skin, endocrine disruptor, photocarcinogenic, it's almost never used in Europe anymore if its used product needs special label stating product contains Oxybenzone, because of its allergenic nature)
- Enzacamene (4-Methylbenzylidene Camphor, already banned in Europe)
- Benzyl Salicylate (mostly added as fragrance)
- 3-benzylidene Camphor
Best:
- Tinosorb S (extremely stable, no absorption and no allergic reactions thus far)
- Mexoryl XL (stable, not absorbed)
- Uvasorb HEB (improved version of Uvinal T150)
- Uvinal A Plus (extremely effective stable UVA sunscreen, reduces formation of free radicals in sunlight very effectively, although particles are smaller than 500 dalton)
- Neo Heliopan AP (stable UVA filter)
- Tinosorb M (very stable, reflects, scatters and absorbs, it's a hybrid sunscreen, considered the only real alternative to physical sunscreens without any skin absorption, the only downside is that some people are allergic to decyl glycoside, which is the surfactant that keeps the particles in suspension)
- Mexoryl SX (it is not completely stable, but still very good safety profile)
- Uvinal T150 (one of the most efficient UVB filters)
-Titanium Dioxide (when nano (or micronized) and uncoated it is extremely reactive/catalytic (ROS-production), most companies use the rutile form which is less reactive, still there is discussion if it gets absorbed and how stable the coatings are, reflects and absorbs UV radiation. Non nano forms appear to have far less safety concerns and mainly reflect uv, although hardly any company uses real non nano titanium dioxide, even if they claim they do (most just refer to the mean clustered particle size). Depending on regulations in your country different definitions of nano exist, in the worst case 49% is still in the nano range, while it may be labelled as non-nano. Larger companies are more reliable in their labelling. A non-nano sunscreen must appear extremely white on skin.
- Zinc Oxide (less reactive, but there are more concerns about skin absorption compared to titanium dioxide, not approved in EU yet, but considering most studies say on healthy skin it will stay in the top skin layer approval in the EU is expected, however it is expected on abraded/shaved and even stretched skin over longer periods some amount will get absorbed, also via hair follicles. If the particles get absorbed till the viable skin layers free radical formation may cause skin damage. It's not as white as Titanium Dioxide, so it's more believable some companies use non-nano zinc oxide, but still the product should appear very white on skin in that case. Compared to Titanium Dioxide it's safer)
-Phenylbenzimidazole Sulfonic Acid (Non greasy UVB filter, although may produce free radicals and allergy has been observed)
- Ethylhexyl Salicylate (some skin penetration and not completely stable, but in general oke safety profile)
- Polysilicone-15 (unlikely to cause any allergic reactions)
Comments
https://www.ncbi.nlm.nih.gov/pubmed/22283432
https://www.ncbi.nlm.nih.gov/pubmed/25384223
https://www.ncbi.nlm.nih.gov/pubmed/23340396
http://www.medscape.com/viewarticle/730096
Invisible Zinc Tinted Daywear SPF30+
Invisible Zinc 4 HR Water Resistant SPF50+
Koreans use lots of weird ingredients we are unfamiliar with in the Western world!
Preservatives are necessary... I don't know much about them tbh. Personally I use phenoxyethanol in my DIY as I noticed them used in my derm's products. Not for the purist but easier to formulate with than the "natural" preservatives
Looks like only the moisturiser has Urea... so the other 3 are ok
I am not sure how I feel about their Zinc Oxide that isn't coated tho the Australia TGA says it is safe
Safety Measures/Side Effects:
A lot of controversy surrounds the safety of diazolidinyl urea. Many believe it to be both toxic and carcinogenic, mainly due to the fact that it's a proven formaldehyde releaser. However, the Cosmetic Ingredient Review (CIR) Expert Panel evaluated the available data on this ingredient (and reevaluated it in 2006) and concluded it as safe to use on cosmetic products at a maximum concentration of .5%. Their studies demonstrated it to be neither toxic nor photosensitizing. However, tests did show it to produce mild skin irritations in some (1 out of 1000), so this ingredient should probably avoided by those with very sensitive skin.
source
@Peter OMG :-O
the length of the first preservative is so long... it reminds me of supercalifragilisticexpialidocious!
I like:
- Squalane
- Vitis Vinifera Seed Extract, grapeseed extract
- Vitamin C (Ascorbyl Glucoside, Ascorbic Acid, Ascorbyl Tetraisopalmitate)
- Olea Europaea Leaf Extract,
- Zinc PCA
- Lecithin
- Vitamin E
- Ubiquinone
all these antioxidants will be useful to protect against Infrared radiation from the sun.
@Peter
Ultrasun Anti-age SPF50+ PA++++
gosh this sunscreen looks really good!
Active ingredients: