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Featured
What To Know Before You Dye Your Hair
What To Know Before You Dye Your Hair

I know you’ve dyed your hair. Most of us do! In fact, it’s estimated that up to 75% of woman and 10% of men use hair-coloring products. However, a recent article in The Journal of Clinical and Aesthetic Dermatology “reviews the evidence relating personal hair-dye use to the risk of developing several type of malignancies.” In other words, those scientists asked: Is there any evidence out there that using hair dye can cause cancer?

Several studies have demonstrated that direct application of some of the chemicals found in hair dye can cause cancer in lab animals, but does this translate to humans? In the 1980′s some of these cancer-causing chemicals were banned from hair dye in the US. However, similar compounds can still be found in certain hair dyes currently on the market.

The authors reviewed 60+ studies on the topic. For most of the cancers examined, studies did not demonstrate an increased risk from hair dye use.

However, a couple of associations were seen. First, there was an increased risk of non-hodgkin’s lymphoma (NHL), among women who used hair dye prior to the 1980s, and who used permanent, dark colored dyes for more than 15 years. One study showed increased risk of the follicular type of NHL in women who used dark colored dyes regardless of the year of use.

Second, the authors also reviewed articles that demonstrated a statistically significantly increased risk of certain tumors in children whose mothers used hair dye during pregnancy.

The writers concluded there may be an increased risk of NHL from hair dyes made of darker colors and increased number of exposures to such dyes and there may be an increased risk of childhood malignancy from hair-dye use in pregnancy.

The authors suggested a couple of anecdotal tips to decrease risk: before dying your hair “apply a petroleum-based ointment to the scalp” so as to minimize the dye’s contact with that skin. Also, “reduce the time of dye application by 25% for each dying session.” And finally, if you are pregnant, play it safe and avoid hair dye all together!

Reference:
Saitta P, Cook CE, Messina JL, Brancaccio R, Wu BC, Grekin SK, Holland J. Is there a true concern regarding the use of hair dye and malignancy development? A review of the epidemiological evidence relating personal hair dye use to the risk of malignancy. The Journal of Clinical and Aethetic Dermatology. 6(1):39-46, 2013

photo by: Nathan O'Nions

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Fight Dandruff!
Fight Dandruff!

It happens to most of us at some time or another and, in winter,  it is more common: dandruff! There are a multitude of anti-dandruff products on the market and here are some tips to make the most of those over-the-counter shampoos: 1) Don’t rush the process. It’s important to lather and leave shampoos on for five minutes before rinsing. 2) Remember that anti-dandruff shampoos are treatments for the scalp, not your hair, so make sure you are getting the lather directly on the scalp skin.  If you don’t like how your hair smells or feels after using one of these shampoos, you can follow with your preferred shampoo or conditioner. 3) It can help to get two or three different anti-dandruff shampoos (with different main ingredients) and alternate between them (e.g. use two or three different shampoos in a given week). The reason this strategy can work is because the various ingredients target different aspects of dandruff:

 

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What’s The Best Way To Treat Dry Skin?
What’s The Best Way To Treat Dry Skin?

It’s that time of the year! Snowing and Minnesota-cold! Check out Dr. Ahmed’s skin tips for Jason DeRusha on how to treat dry skin. Are you using the right moisturizer? You’d be surprised!

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The ABC’s Of Aging Gracefully
The ABC’s Of Aging Gracefully

Gifts of time… The birthday present you didn’t ask for… Any way you put it, there are tell-tale signs that skin is aging. These include the development of wrinkles, discoloration, mottling or patchy skin, broken blood vessels (red spots), decreased radiance and loss of firmness. Below the surface, we also see loss of the deeper tissue (skin, fat and bone). To our eyes, it appears that everything’s moving down — the effect of gravity — or the dreaded word, “sagging”. Why do these changes occur? A lot of the damage, both on the surface, as well as deeper within, comes from sun exposure. Free radical damage occurs throughout our body with age and from various exposures, including the sun and other toxins (pollution, cigarette smoking, and other damaging environmental elements). Free radicals are unstable molecules that form from these toxic exposures. When they develop, free radicals set in place a series of reactions that ultimately lead to the breakdown of healthy tissues. In the skin, they destroy the structure and accelerate premature aging, resulting in fine lines, wrinkles and hyperpigmentation – the changes that we see on the surface. They also accelerate the loss of the deeper tissues in the skin. Antioxidants help protect against free radicals by stabilizing them. There are ways to slow these changes so that we age gracefully. Protect your skin from the sun. Exposure to ultraviolet (UV) light speeds up the natural aging process of your skin, causing wrinkles and rough, blotchy skin. In fact, sun exposure is the No. 1 reason for signs of aging in the skin, including uneven pigmentation. Protect your skin — and prevent future wrinkles — by limiting the time you spend in the sun, never using tanning beds, and always wearing protective clothing and hats. Also, use sunscreen on exposed skin when outdoors, even in winter. Choose products with built-in sunscreen. When selecting skin care products, choose those with a built-in sun protection factor (SPF) of at least 15. Also, be sure to select products that are broad spectrum, meaning they block both UVA and UVB rays.

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Whey Protein, Milk And Acne
Whey Protein, Milk And Acne

Recently a case series was published describing five teenagers who had all experienced sudden onset of moderate to severe acne. On further questioning, the dermatologist learned that these teenagers had all independently started using whey protein as a supplement for body building prior to the acne. When these young men discontinued the whey protein supplement, their acne improved; for those who then restarted taking whey protein, their acne flared. Why would whey protein lead to acne? Whey protein in nutritional supplements is generally derived from cow’s milk. Whey makes up approximately 20% of the protein in milk (the other 80% is casein). Two larger well-designed studies have examined whether or not cow’s milk consumption is associated with acne in teenage girls and separately in teenage boys. (i.e. does drinking milk or eating cow-milk products cause acne?). Both studies showed a mild, but statistically significant, increase in acne in teenagers who drank more than two glasses of cow’s milk daily compared to teenagers who had less than one serving per week. Associations were slightly stronger for skim milk (compared to whole milk) consumption, which is interesting because there is a higher relative percentage of whey protein in skim milk. What does this mean?

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Razor Bumps Away
Razor Bumps Away

Ingrown hairs are frustrating. Instead of a smooth shave, ingrown hairs look like skin-colored or pink bumps. Ingrown hairs occur when hair curls back or grows sideways into the skin. While they generally occur after shaving or waxing, they can occur anywhere–even without hair removal. Other causes include tight clothes that rub against the skin or keratosis pilaris. People with curly or course hair are more likely to get ingrown hairs. Unfortunately, ingrown hairs can lead to pseudofolliculitis barbae (razor bumps) and  folliculitis, which is inflammation around the hair follicle. The dreaded red bumps. There are factors that increase your risk of developing razor bumps. Increased pressure or friction during shaving damages the skin where the hair grows out–called the ostia of the hair follicle. You can see your ostia more prominently when you get goose bumps – take a look! With increased pressure from shaving, you can make micro-cuts in your skin, which then increase the tendency for the hair to become ingrown as it grows back.

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  Dr. Rehana

Dr. Rehana

Rehana Ahmed specializes in Medical, Surgical, Pediatric, and Cosmetic Dermatology. Additionally, she comes to Dermatology with a background in clinical research. Her work has been published in the New England Journal of Medicine and the Journal of the American Medical Association and reported on in The New York Times and Prevention magazine. She is a diplomate of the American Board of Dermatology and a member of the American Academy of Dermatology as well as Assistant Professor of Dermatology at the University of Minnesota.

January 28, 2013

What’s The Best Way To Treat Dry Skin?

January 28, 2013/ Dr. Ahmed

It’s that time of the year! Snowing and Minnesota-cold! Check out Dr. Ahmed’s skin tips for Jason DeRusha on how to treat dry skin. Are you using the right moisturizer? You’d be surprised!

photo by: kaibara87

January 28, 2013/ Dr. Ahmed/ Comment
Featured, Simple Skin Care Steps, Protect Your Skin

Dr. Ahmed

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Dr. Ahmed sees patients at Lakes Dermatology, conveniently located at: 14305 SouthCross Drive, Suite 110 Burnsville, MN 55306

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