Showing posts with label UVA. Show all posts
Showing posts with label UVA. Show all posts

Monday, October 1, 2012

Nivea Whitening, Cell Repair & UV Protect Body Lotion {Product Review}

Price: Rs 225 for 950ml

Pros
gets absorbed really quickly into the skin
keeps skin hydrated and moisturized for a long time 
very thin in consistency and you don't require much
has UVA protection

Cons
doesn't have UVB protection
I am not sure about the whitening claims
can't be applied at night coz of UV filters in the product

My Experience
To start with, the consistency of the product is really thin so it gets absorbed very easily but do not underestimate its moisturizing or rather the hydrating properties of the product. It keeps the skin in a great supple condition for almost 6-8 hours and that's the max I have used this product because I remove it in the evening.


I had read somewhere (in someone's review, don't remember which!!) that it helps curb tanning but I don't think I really saw anything like that. The product boasts of 40X Vitamin C but I really didn't see it do anything extraordinary. I think the reason may also lie in the fact that I used it only while going out and not at night or otherwise.

I think it would have been better if the product did not have UV filters so that it can be used at anytime and probably might show some effect on tanning.I totally don't like the whitening claims and regarding UV claims, I always prefer to use sunscreen. I tend to stay away from products which say they moisturize as well as protect. So, I used to layer this upon the sunscreen.

Overall, I am not really sure about the product so I guess they should launch the same in a variation which doesn't have sunscreen. Have you used the product? How did you like it?

PS: Product sent by brand.

Other products I love or hate from Nivea:

Monday, May 14, 2012

Do sunscreens prevent tanning? {Reader's Query}

Sunscreens are essentially made to prevent the sun's rays to harm your skin and trigger skin cancer. But, depending on the strength of the sunscreen, it might have tanning prevention abilities. 

Physical Sunscreens
Predominantly used physical sunscreen agent, Zinc Oxide, is a broad spectrum sunscreen which protects skin from both UVA and UVB rays (both types). Generally, it helps a lot in preventing tanning. But, there is a loop hole here. The abilities of the sunscreen depends on the strength of its protection. For example, if you are using a spf 15 sunscreen, it filters out 92% (rounded figure) of the sun's rays and still allows 8% to go through. Those 8% of the sun's rays can still harm the skin. 

Similarly, when talking about Titanium Dioxide, it filters out all UVB rays but only half of UVA rays which reduces the strength of the sunscreen considerably. In spf 15, 8% of rays are still passing through to the skin and also, UVA rays are separately affecting your skin because the sunscreen can't block them. Also, Titanium Dioxide is responsible for generating free radicals in the body unless it is coated.

Chemical Sunscreens
The major issue with chemical sunscreen is the stability factor. The chemical ingredients breakdown on exposure to sunlight. Yes, that's a contradiction to the function of the product. That's the main reason why a sunscreen has to be reapplied after every two hours. Also, they have a tendency to generate free radicals in the body which can also trigger cancerous reaction within the body.

Also, let me say here that the "Helioplex" of Neutrogena is a stabilising formula (read this post for more details) to prevent the breakdown of the chemical sunscreen ingredients which makes its sunscreens effective on a longer length of time. But, again the strength of sunscreen decides the amount of rays passing through to the skin and they can cause tanning. 

Also, a sunscreen which doesn't have PA ratings gives no protection against UVA rays so still your skin is vulnerable to tanning and aging. PA ratings gives protection against the UVA rays and spf gives the protection strength against the UVB rays so a sunscreen needs to have both these factors mentioned for it to be a broad-spectrum sunscreen.

Recommended Sunscreens:
MVO Moisturizing Face Screen
Neutrogena Ultra Sheer Dry-Touch Sunblock

Friday, April 13, 2012

Are you keeping track of UV Index? {Sunscreen}

[Source:thegolfforecast.com]
What's a UV Index? 
It's the measure of strength of sun's UV radiation. Its just like a weather forecast and tells you if you need to cover up from the sun or not. This measure has been standardised by the World Health Organisation (WHO) so its a reliable measure.
UV Index Table (Source)
How to check the UV index?
You can always google it for your own city. Another source is weatheronline.co.uk. I found it while doing the googling myself :D And, the UV index of Hyderabad for April 12 to April 15 is 12 (Source). Who would think with the weather out there (its cloudy and rainy these days) that the UV index and radiation would be so high??? So, Hyderabadis, apply proper amount of sunscreen and don't venture outside in the noon unless absolutely necessary!!!

PS: If you find the post useful, please don't forget to share it with your friends and family. Its a health issue which everyone should be aware of.

More posts from sunscreen diaries:
Zinc Oxide vs Titanium Dioxide
Is my sunscreen working?
Surfaces and Radiations
What are UV Radiations?
What Sunscreen should I buy?
Sunscreen Ingredients
Use sunscreen 365 days a year
How much sunscreen do you apply?
Sunscreen: Role in anti-aging Skin Care

Wednesday, September 21, 2011

What are UV Radiations? {Sunscreen}

Ok, so I have never really discussed what exactly are UV radiations and how are they harmful for us even though I have done many articles on sunscreens. So, for those who are not aware, the UV radiations are the ones emitted by the sun and these are extremely harmful for the skin. These radiations are known to cause various type of skin cancers, affect the immune system and of course, regular skin disorders like sunburns, wrinkles, fine lines and age spots. Now, there are two types of radiations which are most harmful and penetrate the Earth's atmosphere - UVA and UVB. In case  you are thinking that there are no other radiations emitted by sun, they are all (UVC and other radiations from the sun and other stars) absorbed by the ozone. That again is very important reason why we should help reduce global warming otherwise more radiations would penetrate Earth's atmosphere and harm the human beings. Even UVA and UVB do get blocked to a lot of extent but our wearing out the ozone layer is causing some havoc.

UVA is mainly responsible for aging of the skin. It is the dominant of the radiations and penetrates the skin more deeply causing the wrinkling and damaging the skin. It also results in the tanning of the skin. And, may also initiate skin cancers. And, UVB results in the skin reddening and sunburns. It contributes to tanning and aging but mainly plays a key role in development of skin cancer. UVB is intense in the time from 10AM - 4PM all the year round and is more intense on reflective surfaces like snow and ice. It doesn't penetrate the glass much. UVA rays penetrate glass, though, even the tinted ones!!!

Now, one more damage which the UV rays can do is damage to the eyes. So, it is advised to get shades or make your glasses with photo-chromatic lenses so that they are able to deflect the sun rays. And, do not forget to wear sunscreen even if you are staying inside. Both UVA and UVB can penetrate through open windows.

Now, in this post, I mentioned a small point that spf factors block UVB radiations. Well, yes. They do not in general block UVA radiations. There is a star system which determines the sunscreen's efficiency in blocking the UVA rays so basically, you are only protecting yourself from UVB. Currently, I do not think there is any sunscreen in India with star ratings. That's a downside of getting even the best sunscreens.

Thursday, September 8, 2011

How much sunscreen do you apply? {Sunscreen}

I have read so many reviews on other blogs and sites especially on sunscreens. And, I have found out one terrible mistake which people make - amount of sunscreen to be applied for proper protection. Many people apply a drop of the product or equivalent. That got me thinking about the amount of sunscreen which should be applied for optimal protection. And, then, I came across a comment in facebook by Renne Rouleau which said that two finger length amount of sunscreen should be applied to every part of the body. 

So, I tried to find more about what is the ideal amount of sunscreen which should be applied. And, the information I came across was correct. If one applies amount of sunscreen which can be traced along the length of their middle finger, they get adequate protection of 45 minutes and if they apply the amount traced across both their index and middle finger, they get optimal protection of 2 hours and 15 minutes. And, this amount of sunscreen has to be applied to every part of the body. The body is divided into 11 parts - face and neck, upper back, lower back, chest, stomach and waist, both upper thighs and lower thighs including feet. So, you need to apply two finger length amount of sunscreen for every part of the body for optimal protection. And, sunscreen has to be applied every half hour according to the article I am referring to.

PS: The information provided in this post has been taken from this article. Kindly refer to it for more details. The link to this article was shared by Tanveer of Addicted to Blush so very thanks to her!!!

So, how much of this advice do I follow? Ok, no, I do not reapply any sunscreen after going into the sun. Not even during my vacation. And, I apply only a finger length amount to my face and neck. May be it is pretty less but frankly the products is so heavy and makes my skin so oily that there is no scope for reapplication unless I wash off my face and do the whole routine again which is again quite an impossible thing. But, how so ever much one might be diligent with sunscreen application and reapplication, it is always best to stay out of sun. I try to follow that rule most of the times :)

PS: This article is relevant for chemical sunscreens.