Wednesday, August 15, 2012
10 most toxic cosmetics
Tuesday, August 11, 2009
Sunscreen Myths Put to Rest
You do not need sunscreen in winter or on a cloudy day
False. You need sunscreen EVERYDAY. The ozone layer and clouds help screen us from some UV rays but at least 80% of the rays still hit the earth and even if you don’t feel the heat of the sun, UVA rays are still present. Not to mention that whatever UV rays that hit the earth get reflected off surfaces and yes, onto our skin.
This is especially true if you live in the city. UV rays reflect off buildings, windows, cars etc and if you aren’t protected by sunscreen or sunblock, you are just soaking up the rays and generating free radicals within your body. During winter or on cloudy days you can use sunscreen with a lower SPF with a minimum of SPF15 but try not to compromise on your UVA blockers.
You do not need sunscreen if you stay indoors
False. Even if you do not get the sun’s rays UVA rays can still penetrate into our homes. Also, UV rays get generated from lights and television screens and computer monitors so do not abandon your sunscreen even if you are planning to stay indoors the whole day.
I can’t wear sunscreen because I will break out
False. Try to look for a sunscreen with physical blockers like Titanium Dioxide or Zinc Oxide or natural sunscreens. It is common for people to be allergic or to break out from chemical sunscreens but physical blockers will have a lower risk of breaking out sensitive skin. This is not to say that physical blockers will 100% be safe for the skin. I discussed what are chemical and physical sunscreens in a previous post.
The higher the SPF the better the sunscreen
False. SPF is a measure of sun protection and an accepted measure of how the sunscreen performs against blocking UVB rays. However there is no general accepted measure of UVA blocking. Japan uses the PA rating for rating UVA blocks which we are familiar with these days. So, in the tropics try to get a sunscreen with at least SPF30 and PA+++ for better sun protection.
I should stock up on a sunscreen I like during a sale
False. Sunscreens have a shelf life of between 2.5-3 years from the date of manufacture. After that the ingredients may not be as effective anymore and you may in fact be doing your skin a disservice by using old sunscreen because the blockers may no longer be doing their job effectively. Always buy sunscreen that is as close to its manufacturing date as possible. This also means that unless you can get fresh stock at a warehouse sale, that is no place to shop for your sunscreens!
The headline:Antioxidants make better sun protection.
The reality:Antioxidants such as green tea and dark-red fruits may be able to mitigate only a little of the damage that sunscreens miss. For example, green tea offers some UV protection, but studies have mostly looked at 100 percent green tea applied topically, not how well it works incorporated into a cream. The bottom line: "Antioxidants make great supplements to sunscreen," says Dr. Draelos. "But until the FDA puts them on the list of sunscreen actives, don't expect them to replace broad-spectrum UVA/UVB sunscreens."
The headline:You shouldn't wear sunscreen because it filters out good-for-you vitamin D.
The reality:This suggestion makes dermatologists absolutely crazy; many believe it's a notion perpetuated primarily by the indoor-tanning industry, which stands to profit from people using tanning machines to boost their vitamin D. Here are the facts: Sunscreenscanlower vitamin D production, but you can easily make up for this loss with food sources (salmon, fortified milk, etc.), vitamins, or even the most trivial amounts of sunlight, according to dermatologists. "It's still much safer to get your vitamin D from a pill than to stay in the sun without protection," says Dr. Leffell. How much D do you need to reap its benefits? Many experts think current vitamin D recommendations are set too low, so definitely check with your doctor for dosing advice.
The headline:Sunscreens won't prevent skin cancer (and may even cause it).The reality:Some researchers blame sunscreens for encouraging the notion that it's OK to stay in the sun for prolonged periods, provided you're slathered in SPF. They also point to steadily rising skin-cancer rates as proof of sunscreen's relatively poor performance. But dermatologists say it's people's behavior, not their sun protection, that's behind those alarming statistics. "Sunscreens can prevent skin cancer, but they need to be part of an overall protection program," says David J. Leffell, M.D., professor of dermatology and surgery at the Yale School of Medicine. "You also need to stay out of the sun from 10 a.m. to 4 p.m., wear protective clothing, and seek shade whenever possible."
The adverse effects of smoking on your beauty
This is a day in which those who smoke are encouraged to quit for 24 hours in hopes that they will quit permanently.
While it is widely known and accepted that smoking is a contributor to heart and lung disease, to name a few, the adverse effects of smoking and what it does to the skin are less well-known and often ignored.
Dr. Jennifer Linder says, the fact is that smoking is a contributor to many dermatologic conditions and complications, such as poor wound healing, collagen degradation, skin discoloration, the formation of abnormal skin growths, deep wrinkling and premature skin aging.
Linder adds, restriction of oxygen flow to the skin cells is also common, as well as oral cancers of the lips, mouth and gums. It is imperative that we have an understanding of all of the adverse consequences of smoking, including its direct effect on the skin.
Ironically, most people start smoking as teenagers because they think it will make them appear older and more mature.According to Linder, this thought process is not far from the truth: Smoking actually does make you look older by aging your skin prematurely.
She says, the connection between skin aging and cigarette smoking is now so apparent that warning labels such as "smoking makes your skin age" can be seen on cigarette packages in Europe and in other parts of the world.
Linder also says oxygen is imperative for skin cell health.
The vessels within the skin are responsible for transporting oxygen to the skin cells.
One cigarette actually causes vasoconstriction, meaning the vessels to contract and become tighter, for up to 90 minutes.
In addition, the carbon monoxide that is in cigarettes actually bonds with oxygen and keeps it from getting to the skin cells.
The body realizes that there is not enough oxygen being supplied to the skin cells and begins producing more blood vessels.
Linder says, this is the reason why those with a condition known as "smoker's skin" have more visible blood vessels.
Skin discoloration is also common with this condition.
A grey or yellow tone will be present, rather than the pink color of healthy, oxygenated skin.
Linder says evidence shows that smoking also induces something called metallo-proteinase activity, which is a function in our skin specifically responsible for the breakdown of collagen.
Collagen production is important for retaining the elasticity in our skin, and as we age, this production decreases.
This accelerated degradation of collagen caused by smoking, combined with the repeated pursing of the lips and squinting of the eyes when inhaling a cigarette, ultimately increases the depth, size and severity of facial wrinkling and is often more evident on the faces of female smokers.
Other signs according to Dr. Linder, slow wound healing is another serious and sometimes deadly effect of smoking.
It is recommended that anyone who smokes should discontinue this practice before undergoing any type of surgery, whether elective or mandatory.
The increased vasoconstriction and decreased collagen production associated with smoking are significant concerns, as the main determining factor of the strength of an operative incision is mature collagen.
Linder says smoking also increases the formation of numerous types of neoplasms. Neoplasms are abnormal growths of tissue whose cells proliferate, or grow, more rapidly than normal. The end result is a distinct mass which is foreign to normal tissue. Neoplasms can either be benign or malignant.
Besides the many devastating effects smoking has on the skin, it is also important to consider the other unsightly cutaneous effects of smoking, such as yellow fingers and fingernails, increased wrinkle depth and severity, as well as a dull, sallow appearance to the skin.
It is also important to note that smoking for only five years causes enough damage to the skin to cause "smoker's skin," which may appear many years later.
Kaali Mehndi - an alarming report from the U.S
To say "black henna" products are a blatant not to mention disgusting example of henna at its most adulterated is a vast understatement. Originally used because women were unable to buy natural henna for body art (black henna hair color was only at hand at times due to the import markets created in Europe, Australia, etc., which depleted domestic supply), denatured black henna created its unhealthy niche amoung some. This inturn led to numerous, well known, adverse health conditions to be reported amoung women in the Old World. Due to a lack of understanding concerning the dangers of using these products and an illigal neglect of providing proper ingredient labels, many people in the US now have become injured or effected by black henna.
A number of products now sport the claim that their is no PPD in their product. Since many of these products are imported "as is" with no spot checking, such claims must be taken with a grain of salt. What if the claim is true however? Does this mean the black henna product is safe, non-toxic and legal (in the US)? The answer is of course a resounding no. People have reportedly suffered the exact same skin reactions from black powders later tested and found not to have traces of PPD. Why? The reason is there are a whole host of other synthetic dyes and oxidizing chemicals which are not safe and not disclosed in these black henna products. In addition, many of these products are comprised of only 50% henna, with chemicals and fillers being the other half. Some of these include silver nitrate, carmine, titanium dioxide, ethyl cellulose, barium peroxide, tartaric acid, pyrogallol, etc. Carmine is extremly hazardous and can cause swelling and other PPD mimicking symptoms. The silver nitrate also causes chemical burns which may not show for days. The FDA states products called henna or that use henna on the lable may not have such adulterations. Thus they are not to be sold in the US.
The reason henna has so many problems today is complicated. Greed is of course at the root of the problem but there are many other contributing factors. In the US, the main problem comes with the companies selling henna for body art. Many do not take into consideration the henna they are buying in bulk has not been tested for Lawsone levels or simple things like lead and/or bacteria which can cause people to become extremly ill. This is because henna purchased by the ton is extremly cheap and many times does not catch the eye of the FDA in bulk. Questions to ask youself and/or anyone selling henna is, what kind of quality control is done? Is each batch of henna received lab tested for adulterants? Are whole leaves ground here in the US or where they were exported from? What are the product standards in the country where it is exported from? India and Pakistan are major exporters but also frequently have contamination problems. Does the box and company conform to FDA standards? Does the company understand how the FDA views henna and its uses? Has the company had complaints lodged against them?
The reason why it is important not to buy adulterated henna products is because of the time most Mehndi designs are left on the skin or color on the hair. This can span from 1 hour to overnight. Many of the advser chemicals used to adulterate henna are ones traditionally used in hair color. These chemicals are never intended to be left on the skin but instead the dead shaft of the hair. Unlike safer bodypaints and non-toxic pen ink, these chemicals can enter the blood and be circulated about your body causing all sorts of health problems. This is likely one of the main reasons the FDA states henna should only be sold in a pure state, if henna is mentioned on the label..
Adverse Reactions to Herbal Therapy in Dermatology
Many of these therapies are considered "natural" and therefore harmless. However, because of the poor regulations that exist in monitoring these drugs, adverse reactions do occur. Herbal therapy, therefore, should be avoided in pregnancy, infants and children because of the uncertainty of adverse reactions that could occur. There is little incentive for pharmaceutical companies to investigate or standardize these preparations because it is unlikely patents would be applicable.
Because of the assumed safety of natural products, many patients believe these products have "fewer" side-effects. Herbal therapies should be regarded as drugs. Since drugs have side-effects, such events can be seen with herbals. Drug interactions although infrequent, can also occur with herbal therapies and conventional medications.
The most common dermatologic reaction from herbal therapies is allergic contact dermatitis. Herbs that are known for causing this condition include: aloe, arnica, bromelain, calendula, chamomile, goldenseal, tea tree oil and yarrow. However, more serious events have occurred including erythroderma and Stevens-Johnson syndrome from combination herbal preparations. Serious systemic adverse events have been reported with herbal therapies for the treatment of dermatological diseases as well. Most are hepatotoxic effects and some have been fatal although this is rare.Herbals that are recommended for topical use should not be ingested and vice-versa. Drug interactions that most commonly occur are due to immunomodulatory reactions, however effects on anticonvulsants and anticoagulants can occur.