Skin Care Hub

An additional concern arose as FDA prepared its 1996 report on AHA safety: Some people who had reported adverse reactions cited increased sun sensitivity. In addition, one industry-sponsored study found that participants whose skin was exposed to 4 percent glycolic acid twice daily for 12 weeks developed minimal skin redness with 13 percent less ultraviolet (UV) radiation exposure than normal. Three participants developed minimal redness with 50 percent less UV exposure than normal.

Another study that looked at the effects of glycolic acid on production of sunburn cells (markers for UV-induced skin damage) found that people who received the AHA product in the presence of UV radiation experienced twice the cell damage in areas where the AHA had been applied than those who were treated with the non-AHA product.

FDA’s concern is that people who are sensitive to sunlight may be particularly susceptible to UV rays, which can damage the skin and, over a long period, can cause skin cancer.

In 1997, the Cosmetic Ingredient Review Panel–the cosmetic industry’s self-regulatory body for reviewing and addressing safety of cosmetic ingredients–concluded that the AHA’s glycolic acid and lactic acid and their related chemical compounds are safe for use in products intended for consumer use when:

• the AHA concentration is 10 percent or less
• the final product has a pH of 3.5 or greater (lower numbers indicate greater acidity)
• the final product is formulated in such a way that it protects the skin from increased sun sensitivity or its package directions tell consumers to use sunscreen products.

For AHA products used by trained cosmetologists, the Cosmetic Ingredient Review Panel concluded that formulations of glycolic acid and lactic acid at concentrations of 30 percent or less and a pH of 3.0 or greater intended for only “brief” use at one time followed by thorough rinsing and daily use of sun protection are safe.

The panel’s conclusions actually serve as guidelines for cosmetic manufacturers, Bailey says. “This means that each manufacturer of an AHA product should conduct appropriate testing on their products to measure whether or not the product increases the sensitivity of the user to UV radiation and, if so, should add sun protection to their product and warn consumers to take extra steps to protect themselves at all times.”

Meanwhile, FDA continues to study AHA safety. Later this year, scientists with the National Toxicology Program and FDA will use hairless mice to study the effect of AHAs on the risk of cancer associated with sunlight and UV radiation. The study will run for about three years.

Depending on the outcome of FDA’s investigation, Bailey says, the agency may or may not take action against AHA products. “The absence of action by FDA to date doesn’t mean that there won’t be any in the future.”

Source: U. S. Food and Drug Administration

Some in the cosmetic industry have suggested that AHA products are more than simple cosmetics, coining the term “cosmeceutical” to describe them instead.

Under the 1938 Federal Food, Drug, and Cosmetic Act, cosmetics are defined as “articles intended to be rubbed, poured, sprinkled, or sprayed on, introduced into, or otherwise applied to the human body or any part thereof for cleansing, beautifying, promoting attractiveness, or altering the appearance.” Drugs are defined as products intended for treating or preventing disease and affecting the structure or any function of the body. They are subject to premarket review and approval; cosmetics are not.

“The term ‘cosmeceutical’ is not recognized by law,” Bailey says. “These products, depending on their intended use, would be regulated either as cosmetics, drugs, or both as cosmetics and drugs.”

FDA has a particular concern about AHAs because, unlike traditional cosmetics, AHAs seem capable of penetrating the skin barrier. In reviewing the limited data on AHAs, FDA concluded in a 1996 report that certain formulations of AHA products can affect the skin in a manner similar to that of chemical peels–that is, increasing cell turnover rate and decreasing the thickness of the outer skin. The effect depends on the product’s pH level (a measure of its acidity), the AHA concentration, and the AHA vehicle cream, as well as how the product is used (for example, frequency of use and where on the skin it is applied).

Source: U. S. Food and Drug Administration

AHA cosmetics are believed to have derived from the “chemical peels” that dermatologists and plastic surgeons have used for years. The peels, typically trichloroacetic acid, phenol, resorcinol, and salicylic acid, help remove undesirable signs of skin aging, such as discoloration, roughness and wrinkling. The chemicals cause the skin to lose its outer layer, or peel off, revealing a fresher-looking layer of skin. Known as chemical exfoliation, the procedure is done in doctors’ offices so that doctors can control the process and prevent deep skin burns from the highly acidic solutions.

Cosmetic manufacturers began to market similar but milder versions of these chemical peels containing AHAs for salon and at-home use around 1989. They quickly caught on, and by 1992, mass marketing had begun. Today, says Lisa Berger, a cosmetic sales manager for a Hecht Co. department store in Washington, D.C., “every [cosmetic company] has AHA products. There used to be only three product lines; now there are 20.”

The AHAs used most often in cosmetics are glycolic acid and lactic acid, although there are others, and many are used in combination. Increasingly, says Zoe Draelos, M.D., a dermatologist in High Point, N.C., manufacturers are using poly-AHAs, which have larger molecules, and ingredients such as salicylic acid. According to Draelos, who consults for several large U.S. cosmetic companies, these products may produce less skin irritation.

Typically, AHA products sold to consumers have an AHA concentration of 10 percent or less. The concentration of AHA products used by trained cosmetologists may run between 20 and 30 percent, while those used by doctors can range from 50 to 70 percent.

Though sold to consumers mainly in face and body creams and lotions, AHAs also can be found to a lesser degree in other cosmetics, such as shampoos and cuticle softeners. Available everywhere, from discount pharmacies to fine department stores, the products typically range in price from a few dollars to as much as $60 a bottle.

Source: U. S. Food and Drug Administration

Baby boomers and others who once sought the sun’s rays with little thought of skin damage are now paying the price–billions of dollars annually for cosmetics containing alpha hydroxy acids (AHAs). Derived from fruit and milk sugars and served up in creams and lotions, AHAs attract customers with their supposed ability to reduce wrinkles, spots, and other signs of aging, sun-damaged skin. Some scientific evidence suggests they may work.

But are these products safe? Since 1989, the Food and Drug Administration has received more than 100 reports of adverse reactions in people using AHA products. Their complaints included severe redness, swelling (especially in the area of the eyes), burning, blistering, bleeding, rash, itching, and skin discoloration.

FDA believes reactions from AHAs are probably even more widespread. Past experience suggests that for every adverse reaction report the agency receives, the manufacturer receives 50 to 100. “This would translate into approximately 10,000 adverse reactions being received for AHA-containing products,” says John Bailey, Ph.D., acting director of FDA’s Office of Cosmetics and Colors.

Also, their relative newness (they’ve been widely available only since about 1992) means that their long-term effects are unknown. An industry-sponsored study found that people who use AHA products have greater sensitivity to sun, raising the specter of greater risk of photoaging and skin cancer.

“There are many unanswered questions in front of us,” Bailey says. “AHAs are unlike anything else ever introduced onto the cosmetic market on such a wide scale. They are not your traditional cosmetics.”

In spring 1997, the National Toxicology Program of the National Institute of Environmental Science accepted FDA’s proposal to study AHA safety. While FDA awaits the results, expected by the year 2000, the agency is cautioning consumers to take extra care with AHA products: for example, avoiding the sun when possible, otherwise using adequate sun protection, and reporting adverse reactions immediately to doctors or FDA directly.

“These are very, very popular products,” Bailey says. “Very little about the process restricts their sale. And it’s a somewhat alarming idea to put acids on the skin. It raises obvious safety questions.”

Skin cancer is the most common type of cancer in the United States. The main cause of skin cancer is the sun. Sunlamps and tanning booths can also cause skin cancer. Anyone can get cancer, but people with fair skin that freckles easily are at greatest risk. Skin cancer may be cured if it is found before it spreads to other parts of the body.

There are three types of skin cancers. Two types, basal cell carcinoma and squamous cell carcinoma, grow slowly and rarely spread to other parts of the body. These types of cancer are found mostly on parts of the skin exposed to the sun, like the head, face, neck, hands, and arms, but can happen anywhere on your body. The third and most dangerous type of skin cancer is melanoma. It is rarer than the other types, but can spread to other organs and be deadly.

Check your skin regularly, like once a month, for things that may be cancer. Look for changes such as a new growth, a sore that doesn’t heal, or a bleeding mole. Also, check moles, birthmarks, or other parts of the skin for the “ABCDE’s.” ABCDE stands for:

A = asymmetry (one half of the growth looks different from the other half)

B = borders that are irregular

C = color changes or more than one color

D = diameter greater than the size of a pencil eraser

E = evolving, meaning changes in size, shape, symptoms (itching, tenderness), surface (especially bleeding), or shades of color

Don’t wait for the area to hurt—skin cancer isn’t usually painful. See your doctor right away if you have any of these signs.

Age spots are sometimes called “liver spots,” but they have nothing to do with the liver. These flat, brown spots are often caused by years in the sun. They are bigger than freckles, flat, and many times show up on areas like the face, hands, arms, back, and feet. Age spots are harmless, but if they bother you, talk to a dermatologist about removing them. Also, a sunscreen or sunblock may prevent more sun damage.

Skin tags are small, usually flesh-colored growths of skin that have a raised surface. They are a common problem as people age, especially for women. They are most often found on the eyelids, neck, and body folds such as the arm pit, chest, and groin. Skin tags are harmless, but they can become irritated. A doctor can remove them if they bother you.

Bruises

Older people may bruise more easily than younger people. And, it can take longer for the bruises to heal. Some medicines or illnesses cause easier bruising. If you see bruises and you don’t know how you got them, especially on parts of your body usually covered by clothing, see your doctor.

Wrinkles

Over time, skin begins to wrinkle. Things in the environment, like ultraviolet (UV) light from the sun, make the skin less elastic. Gravity can cause skin to sag and wrinkle.

Certain habits like frowning also wrinkle the skin. Some of these habits are easier to change than others. You may not be able to change how you lie when you sleep, but you can quit smoking. Not smoking is a great way to prevent wrinkles.

A lot of claims are made about how to make wrinkles go away. Not all of them work. Some can be painful or even dangerous and many must be done by the doctor. Talk with a doctor specially trained in skin problems (a dermatologist) or your regular doctor if you are worried about wrinkles.

Many older people suffer from dry skin, often on their lower legs, elbows, and lower arms. Dry skin feels rough and scaly. There are many possible reasons for dry skin, such as:

• Not drinking enough liquids
• Staying out in the sun
• Being in very dry air
• Smoking
• Having stress
• Losing sweat and oil glands (common with age)

Dry skin also can be caused by health problems, such as diabetes or kidney disease. Using too much soap, antiperspirant, or perfume and taking hot baths will make dry skin worse.

Because older people have thinner skin, scratching itches can cause bleeding that can lead to infection. Some medicines make the skin itchier. Itching can cause sleep problems. If your skin is very dry and itchy, see your doctor.

Moisturizers like lotions, creams, or ointments can soothe dry, itchy skin. They should be used everyday. Try taking fewer baths and using milder soap to help your dry skin. Warm water is better than hot water for your skin. Some people find that a humidifier (an appliance that adds moisture to a room) helps.

Your skin changes with age. It becomes thinner, loses fat, and no longer looks as plump and smooth as it once did. Your veins and bones can be seen more easily. Scratches, cuts, or bumps can take longer to heal. Years of sun tanning or being out in the sunlight for a long time can lead to wrinkles, dryness, age spots, and even cancer. But there are things you can do to help your skin.