Avacor® Hair Regrowth Blog

Exercise and Hair

Exercise and eating the right foods are the keys to a healthy lifestyle. We all know that. But how does exercise affect your hair health, hair loss, or hair regrowth? The answer might surprise you.

In general, exercise can help you maintain a healthy head of hair, and even help your body regrow hair. Regular exercise increases general health and circulation in your body. Increased circulation can stimulate growth in hair follicles. Also, exercise helps reduce stress in your life, and reduced stress helps with overall scalp health, according to Livestrong.com. So, if you exercise regularly, you are doing yourself—and your hair—a favor, right?

The answer might not be so simple.

Too much exercise, or overexertion, is actually bad for your hair. Excessive exercise causes a state of chronic stress in your body, according to author and nutritionist Ann Louise Gittleman. Chronic stress is a leading cause of telogen effluvium (TE), a condition that causes premature resting and shedding in hair follicles, according to the American Hair Loss Association. In addition, eHow.com explains that extreme bodybuilding and other extreme exercise activities can produce more dihydrotestosterone (DHT), which causes baldness in men. Conversely, mild exercise, like regular jogging or cardio, can help reduce DHT.

However, there is one form of mild exercise or cardio to think twice about if you are conscious about your hair health: swimming in pools. Most pools contain chlorine. The chlorine is there to keep the pools clean, but it can cause your hair to become dry and eventually break or shed. If swimming is your favorite form of exercise, you can avoid chlorine damage by wetting your hair with non-chlorinated water before getting in the pool (i.e., a locker room shower), so your hair absorbs the normal water, rather than the chlorinated water. Also, get out every 30 minutes or so and rinse the chlorinated water out of your hair. Wear a swim cap, and wash your hair after swimming with proper hair care products.

Another thing to keep in mind about exercise is that it causes you to sweat. Salty, heavy sweat build up on your head can cause faster shedding or other damage to your hair. The Harvard School of Public Health advises that you can combat this damage by using mild, pH-balanced shampoo and moisturizing protein conditioner at least once a week. Avacor offers both Thickening Shampoo and Volumizing Conditioner to help combat hair loss and stimulate hair regrowth. Avoid using hot hair tools as well, such as blow driers and curling irons.

The bottom line: exercise regularly, but avoid over-exercising or extreme exercise activities, and take good care of your hair with the proper hair care products. If you are eating healthy and exercising regularly, but still experiencing hair loss, consider using Avacor Physician's Formulation, an FDA-Approved hair re-growth product clinically proven to revitalize hair follicles and help you grow back hair.

Photo courtesy of Menscosmo.com


Babies and Baldness

Have you ever wondered why some babies might experience hair loss or thinning hair at such a young age? Some babies are born with little or no hair, while others are born with a thick head of hair. Many babies born with hair lose it within the months following birth, so the baby might have less hair at 6 or 12 months than they did when they were born. Other babies born with little or no hair might have thicker hair when they reach the 6 or 12 month mark, and some babies may appear bald throughout infancy and into early childhood.

The first thing to remember is that your baby's thinning hair (or lack of hair) is rarely a cause for concern, unless the baby's scalp or hair shafts look abnormal. Talk to your pediatrician and ask questions to give you peace of mind, but remember: it is completely normal for babies to lose their hair soon after birth, or to be born bald.

Next, it is important to understand that all human hair naturally goes through a growth cycle, including baby hair. At the end of this growth cycle, old hair sheds to make room for new hair. Sometimes, the shedding occurs before new hair begins to show, while in other cases, the new hair pushes the hair out of the follicle as it grows.

This growth cycle is the primary reason why some babies are born with hair and lose it, as well as why some babies are born with no hair. Simply put, the hair on a newborn's head starts going through the growth cycle before the baby is born. Babies born with a full head of hair have hair that is farther along in the growth cycle. Most of those babies begin to lose that hair soon after birth because the hair sheds to make room for new hair. The new hair may take several months to grow back, which can cause some parents to be concerned over why their new baby, who was born with a lot of hair, is now suddenly bald. Again, this is a common situation, but consult your pediatrician if you are concerned.

Babies born bald might have hair follicles that have not yet entered the phase of the hair growth cycle when hair appears on top of the head. Or, they might have already shed some hair while still in the womb.

Pediatrician Dr. Alan Greene indicates that most babies go through two hair cycles during the first year. For some babies, the old hair sheds at the same time the new hair begins to grow, so it appears as though they never lose any hair. When the cycles are spread out longer over time, the baby appears bald in between the two cycles. However, some baby hair takes longer to enter the second cycle—sometimes as long as 18 months—meaning the baby might not grow visible hair until he or she is a toddler.

Genetics and ethnicity also play a role in a baby's head of hair. They affect the amount of hair a baby has when born and during infancy, the timing of the hair growth cycles, and the texture of the baby's hair. The bottom line is, hair cycles in babies vary significantly, and periodic baldness throughout the first few years of life are rarely a cause for concern.

Photo Courtesy of Infantcrisis.org


Food and Hair Health

You are what you eat. We all know that eating healthy is good for your body. But what about your hair? You may be surprised that what you eat also impacts the health of your hair. Food provides nutrients to our bodies, which are used to help grow fingernails, toenails, new skin, and hair.

Specifically, foods that have high levels of protein and iron can impact how thick and healthy your hair is. Here are some great foods to incorporate into your diet to promote a healthy head of hair, according to WebMD:

Salmon contains a lot of omega-3 fatty acids, which promote strong scalp health and help avoid a dry scalp. It also contains protein, iron, and vitamin B-12. If you don't like salmon, or don't eat fish, try 1-2 tablespoons a day of ground flaxseed.

Dark green veggies like spinach, broccoli, and Swiss chard provide a natural hair conditioner called sebum, produced from the high levels of vitamins A and C found in these foods. They also contain iron and calcium.

Beans provide ample amounts of protein for hair growth, as well as iron, zinc, and biotin. Mix it up with kidney beans, lentils, and other types of beans.

Nuts should also be on your regular menu. Brazil nuts provide selenium, a mineral that helps create a healthy scalp, while walnuts  create natural hair conditioners from fatty acids. Reach for the cashews, pecans, and almonds as well, which all have zinc (zinc helps you avoid hair shedding).

Poultry, like chicken and turkey, provides a high quality protein, which helps maintain a healthy head of hair. A lack of protein, or a low quality protein, can lead to thinner hair, or a loss of hair color.

Eggs are also a great source of protein, as well as biotin and vitamin B-12. They are also versatile; you can cook them in a variety of ways and incorporate them into many different meals (not just breakfast).

Whole grains supply your body and hair with zinc, iron, and B vitamins. Opt for whole-wheat bread and whole-grain cereals.

Oysters have a high level of zinc. They also have a reputation for being a strong aphrodisiac, so give them a try! If oysters just aren't your thing, try beef or lamb instead.

Low-fat dairy products, including skim milk, cottage cheese, and yogurt, contain a lot of calcium, which is a vital mineral for hair growth. They also contain whey and casein, both of which are great natural proteins.

Carrots are delicious, and provide a great source of vitamin A, which helps create a healthy scalp.

AskMen mentions a few other great foods that promote healthy hair. For example, raisins contain iron, which helps manufacture hemoglobin, which in turn ensures your scalp receives enough blood to stimulate hair growth. Potatoes, when baked or boiled (with the skin on), are a much better alternative to greasy fried potatoes, which contribute to hair loss.

Lastly, it is worth mentioning that while all of these products can help stimulate hair growth and create healthy hair, they are not cures or treatments for baldness or thinning hair. Avacor Physician's Formulation is an FDA-Approved hair restoration treatment clinically proven to revitalize hair follicles and help you grow back hair. Use as directed, and for best results, combine the treatment with healthy, balanced meals. Who knew you could eat your way to healthy hair?


Shedding Hair

Shedding is a natural process for all living things. People and animals physically shed hair and skin. People trying (successfully) to lose weight shed pounds. Those hoping to make life changes shed unwanted aspects of their lives, such as unnecessary personal belongings, bad influences, or relationships with other people. Shedding, whether physical, emotional, or otherwise, is essentially a process in which you get rid of something that has served its purpose and is no longer useful to you.

When it comes to your hair, shedding naturally occurs at the end of the hair follicle growth cycle. Hairs on your head go through this cycle and naturally fall out, or shed, to make room for new hair. All people shed their hair, even those who are not experiencing male pattern baldness or female pattern baldness. However, shedding can still be alarming or frustrating, especially if the hair you shed does not grow back.

Baldness is caused by hair follicles that do not produce new hair after old hair is shed. However, according to MedicinePlus, the hair follicle remains alive, even when it stops producing hair. In other words, it is possible for an inactive hair follicle to produce hair again, even after baldness.

Enter FDA-approved hair regrowth treatment Avacor Physician's Formulation®, which is clinically proven to revitalize hair follicles in as little as two months. Once a hair follicle is revitalized, it can begin naturally producing hair again.

However, you still might experience shedding when you begin using Avacor Physician's Formulation. Do not be alarmed, as shedding is quite common, especially at the beginning of treatment. In fact, shedding after you start to use the product is a positive sign that the product is beginning to work.

The reason? At the beginning of the hair follicle growth cycle, new hairs need room to grow, so they push dead hairs out of the way as they sprout upwards. However, older hairs can still remain on your head if new ones do not begin to grow. The older hair might not naturally shed, and is not pushed out by new hair, because the hair growth cycle is essentially paused. When you revitalize the hair follicle using Avacor Physician's Formulation, the growth cycle resumes, shedding all dead hairs that have not yet fallen off on their own. If you notice shedding at the beginning of your treatment, just continue to use the product as directed.

You might also notice occasional shedding throughout your treatment. This is because shedding happens naturally, to everyone. Shedding is, in fact, a sign that hair follicles are actively eliminating old hairs as they produce new ones. Do not be concerned with the shedding; instead, pay attention to whether your hair follicles are producing new hairs to replace the ones that have been shed.

Lastly, it is important to be patient, especially at the beginning of treatment. Avacor Physician's Formulation is clinically proven to revitalize hair growth, but growing a full head of hair takes time. You will not wake up the next morning with a full head of hair, but if you stay the course and use the product as directed, you will be rewarded with rejuvenated hair follicles, and natural, new hair on your head.


Healthy Hair: Biotin and Vitamin B12

When people hear the word “nutrition,” they usually think about keeping their body healthy and staying in shape, but you may not realize that nutrition also affects your hair. Micronutrients like vitamins and minerals are especially important for keeping hair healthy.1

The micronutrients Biotin and Vitamin B12 are two of the most recent additions to our Avacor® All Natural Nutricap, a dietary supplement specially formulated to improve the health of your hair and scalp.*

In this post we have collected a few pieces of information about Biotin and Vitamin B12 that we thought were particularly relevant to healthy hair.

Biotin May Improve Hair Quality/Thickness

Biotin, also known as Vitamin H is a micronutrient that is known to be essential for maintaining healthy hair and skin.1 (According to some sources the H actually stands for "haar und haut", German for "hair and skin".)

Biotin is absorbed into the shafts of hair, where it “moderates the damage environmental or other factors may have caused, and increases the diameter of the hair shafts.” 2

“It is well documented that biotin deficiency in humans and animals causes pathological changes in the skin and its appendages such as desquamative dermatitis and alopecia,” 3 and in animal studies, a biotin-poor diet leads to dandruff-like skin irritation and causes hair loss.4

But biotin supplementation may also be beneficial for people who do not suffer from a known biotin deficiency:

pharmacological doses of biotin have been shown to improve… the quality of nails and hair in humans in the absence of apparent biotin deficiency.” 3

Our All Natural Nutricap now contains 300 micrograms of Biotin to make sure you are getting enough of this important micronutrient.

Vitamin B12 for “Optimal Hair Growth Potential”

Vitamin B12, a water-soluble vitamin containing the element cobalt, is involved in cell metabolism and macromolecular synthesis in all cells throughout the body.

According to the scientific literature, “optimal hair growth potential” requires adequate levels of Vitamin B12 in the body.5 An article from WebMD quotes one doctor, a clinical professor of dermatology, as saying “it's not uncommon to find a B12 deficiency in women who come in seeking treatment for hair loss.”

Since Vitamin B12 is only found in certain foods, our All Natural Nutricap is now supplemented with 6 micrograms of Vitamin B12 to ensure that your body is equipped with the proper nutrition it needs to keep your hair healthy.*

Thanks for reading, we hope you've learned something new about hair and nutrition and that you enjoy the benefits of these improvements we've made to the Avacor® All Natural Nutricap!


1. Daniells S, Hardy G. Hair loss in long-term or home parenteral nutrition: are micronutrient deficiencies to blame? Curr Opin Clin Nutr Metab Care. 2010 Nov;13(6):690-7. Link

2. Goldberg, M.E. Hair enrichment composition and method of use. US Patent No. 5,069,898. December 3, 1991. Link

3. Limat A, Suormala T, Hunziker T, Waelti ER, Braathen LR, Baumgartner R. Proliferation and differentiation of cultured human follicular keratinocytes are not influenced by biotin. Arch Dermatol Res. 1996;288(1):31-8. Link

4. Morganti, P. Medicinal formulation for promoting keratinogenesis and reducing seborrhea of the face and scalp. US Patent No. 4,863,950. September 5, 1989. Link

5. Rushton DH. Management of hair loss in women. Dermatol Clin. 1993 Jan;11(1):47-53. Link

6. Photo above form Properhealthtips.com

*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease.


Free Radicals and Hair Follicle Health

With all the buzz about genetics and DHT causing hair loss, it can be easy to overlook another important aspect of hair care: maintaining the health of your hair follicles and scalp.

Reactive oxygen species (ROS), also called free radicals, damage healthy tissue by oxidizing cellular molecules such as DNA, proteins, and membrane lipids. This phenomenon is known as “oxidative stress” or “oxidative damage.” Antioxidants, or free radical scavengers, are compounds that neutralize the harmful effects of reactive oxygen species.1

Oxygen radicals are produced at low levels in the skin under normal conditions, but certain triggers can lead to much higher levels that can potentially damage skin and hair follicles.

Ultraviolet (UV) radiation from the sun is a well known cause of ROS production, “leading to injury of the putative site of follicular stem cells in the superficial portion of the hair follicle,” and has even been reported to cause hair loss in the form of acute telogen effluvium.2 Oxidative stress is also known to occur in follicular units during hair transplantation.3

In addition to the Avacor Physicians Formulation® with minoxidil, Avacor Laboratories offers two products that are specially formulated to detoxify your scalp and promote a healthy hair follicle: the All Natural Nutricap and the Scalp Detoxifying Shampoo.*

One ingredient in the Avacor® Scalp Detoxifying Shampoo is an extract Silybum Marianum (milk thistle), a plant that naturally produces flavonoid phytochemicals with antioxidant properties.4 A study on the antioxidant effects of silymarin, a polyphenolic component of Silybum Marianum extract, found that it helped preserve the health of hair follicles in rats during oxidative stress associated with burn injuries.5

The Avacor® All Natural Nutricap, a dietary supplement, contains other natural ingredients with antioxidant properties, including resveratrol and bilberry (Vaccinium myrtillus; European blueberry). In vitro studies have shown that both resveratrol and bilberry extract are able to protect cultured skin cells from oxidative stress caused by UV radiation.6,7

Whether you are pursuing a hair regrowth regimen or just want your hair to look its best this summer, make sure you're doing everything you can to take care of your scalp and hair follicles.


1. Knight JA. Free radicals: their history and current status in aging and disease. Ann Clin Lab Sci. 1998 Nov-Dec;28(6):331-46. Link to Pubmed

2. Trüeb RM. Is androgenetic alopecia a photoaggravated dermatosis? Dermatology. 2003;207(4):343-8. Link to Pubmed

3. Crisóstomo MR, Guimarães SB, de Vasconcelos PR, Crisóstomo MG, Benevides AN. Oxidative stress in follicular units during hair transplantation surgery. Aesthetic Plast Surg. 2011 Feb;35(1):19-23. Link to Pubmed

4. Wagner H, Hörhammer L, Münster R. [On the chemistry of silymarin (silybin), the active principle of the fruits from Silybum marianum (L.) Gaertn. (Carduus marianus L.)]. Arzneimittelforschung. 1968 Jun;18(6):688-96. Link to Pubmed

5. Toklu HZ, Tunali-Akbay T, Erkanli G, Yüksel M, Ercan F, Sener G. Silymarin, the antioxidant component of Silybum marianum, protects against burn-induced oxidative skin injury. Burns. 2007 Nov;33(7):908-16. Link to Pubmed

6. Ndiaye M, Philippe C, Mukhtar H, Ahmad N. The grape antioxidant resveratrol for skin disorders: promise, prospects, and challenges. Arch Biochem Biophys. 2011 Apr 15;508(2):164-70. Link to Pubmed

7. Svobodová A, Zdarilová A, Vostálová J. Lonicera caerulea and Vaccinium myrtillus fruit polyphenols protect HaCaT keratinocytes against UVB-induced phototoxic stress and DNA damage. J Dermatol Sci. 2009 Dec;56(3):196-204. Link to Pubmed

*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease.


Brazilian Hair Straightening – FDA Action

An Associated Press article1 published today on numerous news sites is further raising public awareness about the potential problems with formaldehyde (methylene glycol) in keratin hair smoothing treatments.

Many government agencies in the U.S. and abroad have received adverse event reports from consumers about health issues with these products, notably including hair loss.2,3

Just two days ago, an Oregon woman who broke out in boils and lost her hair after receiving a Brazilian Blowout treatment filed a lawsuit against both the product's manufacturer and the owner of the salon where the treatment was performed.4

In response to these reports, several Members of Congress have signed a letter5 to the Commissioner of Food and Drugs expressing their concern about the safety of workers and consumers.

Citing reports to the FDA of “adverse reactions and injuries (including hair loss...),” the letter urged the administration to regulate the formaldehyde content and labeling of keratin hair treatments and to take action against manufacturers who misbrand their products as “Formaldehyde Free.”

The article quotes the letter's author, Rep. Jan Schakowsky, D-Ill., as saying: “It came to my attention that people were getting very sick, that there was hair fall, there were respiratory issues, there were all kinds of problems with Brazilian Blowout.”

The FDA is currently “still evaluating the data” on methylene glycol-containing hair straightening products.

Despite formaldehyde being classified as a known carcinogen by the U.S. Department of Health and Human Services,6 an FDA spokeswoman told the article’s author:

“The use of formaldehyde in hair straighteners is not prohibited, and there are no limits on the level in our regulations.”

Keep checking back here on the Avacor® Hair Regrowth Blog for follow-up on the reports of hair loss, updates on the FDA's response, and any actions the administration takes to regulate formaldehyde exposure from keratin-based hair straightening products.


1. “Call for Regulation of Hair-Smoothing Products.” Associated Press, via NY Times website. July 8, 2011. (Accessed July 8, 2011)

2. “Several Professional Hair Smoothing Solutions Contain Excess Levels of Formaldehyde.” Health Canada. April 12, 2011. (Accessed July 8, 2011)

3. “‘Keratin-Based’ Hair Smoothing Products and the Presence of Formaldehyde.” Oregon OSHA and CROET/OHSU. October 29, 2010. (Accessed July 8, 2011)

4. Terry, Lynne. “Bend woman files lawsuit against manufacturer of Brazilian Blowout.” The Oregonian. July 6, 2011. (Accessed July 8, 2011)

5. Reps. Jan Schakowsky, Ed Markey, Tammy Baldwin, Earl Blumenauer, John Conyers, Nita Lowey, Jim Moran, Barbara Lee, Judy Chu, Ted Deutch. “Letter to FDA on Dangerous Chemicals in Brazilian Blowout Hair Treatments.” May 6, 2011. (Accessed July 8, 2011)

6. “Formaldehyde - Substance Profile” from the 12th Report on Carcinogens, National Toxicology Program, U.S. Department of Health and Human Services. June 10, 2011.


Brazilian Hair Straightening

Brazilian Hair Straightening: Could It “Blow Out” Your Hair?

The news of potential exposure to formaldehyde (a known human carcinogen1) from Brazilian hair straightening treatments began to surface almost four years ago, but adverse event reports recently released by the FDA reveal that some users have experienced hair loss after receiving these treatments.

Brazilian Background

In case you aren’t familiar with keratin straightening treatments (marketed under such names as Brazilian Blowout, Brazilian Keratin Treatment, and Keratin Complex), here is a brief description of the procedure.

Brazilian Blowout states on their product website that their original formula “improves the condition of the hair by creating a protective protein layer around the hair shaft to eliminate frizz and smooth the cuticle.”

According to an Associated Press article2 keratin straightening treatments “surfaced around 2005 in Brazil,” while an article3 on the Modern Salon website claims the procedure arose in the late 1990s in rural Brazil.

These treatments contain two critical ingredients: keratin, a protein found in hair and skin; and chemicals that bond the keratin onto the recipients own hair. The most common bonding chemical is formaldehyde dissolved in water (a.k.a. formalin, methylene glycol), a preservative used in embalming fluid.

In a standard treatment, the keratin/formalin solution is applied to the hair, followed by blow-drying and flat ironing at almost 450o F. The high temperatures used to lock in the treatment result in the production of “clouds of acrid-smelling smoke that stings the eyes.”2

Warnings from Public Agencies

The growing list of government health agencies that have issued warnings about formaldehyde exposure from these procedures already includes the U.S. Occupational Safety & Health Administration (OSHA),4 Health Canada,5 and the Irish Medicines Board.6

Oregon OSHA issued a final report7 on hair smoothing treatments and formaldehyde on October 29, 2010. Tests on 37 samples of Brazilian Blowout Acai Professional Smoothing Solution “Formaldehyde Free” found an average of 8.8% formaldehyde in the product.

Air monitoring tests in seven salons showed that performing a single treatment during one day did not result in actionable levels of formaldehyde in the air, but the report suggested that three comparable treatments by one stylist in the same day could result in levels exceeding the permissible exposure limit. Oregon OSHA “concluded that there are meaningful risks to salon workers when they are confronted with these hair smoothing products.”

Responses from Manufacturers

Some companies insisted their products were “formaldehyde free” because they were made with methylene glycol. Although methylene glycol is made from formaldehyde, known as “formaldehyde in solution” or formaldehyde monohydrate, and capable of releasing formaldehyde into the air, a scientist with ties to the cosmetics industry argued that the chemical formula of methylene glycol is distinct from that of formaldehyde (one ends in -ol and the other in -aldehyde) and therefore products containing methylene glycol should not be considered to contain formaldehyde as an ingredient.

(For more on the controversy over methylene glycol vs. formaldehyde, check out two posts here and here on the blog I Can Has Science, or the industry-supported position here and here.)

After Oregon OSHA publicized its test results, several manufacturers released statements regarding the “formaldehyde free” label and whether formaldehyde was an ingredient in their products (see examples here and here).

Brazilian Blowout subsequently removed the “formaldehyde free” claim from their original formula and released a new product called Brazilian Blowout Zero that does not contain methylene glycol.

Reports of Hair Loss and a Petition to the FDA

An organization called the Environmental Working Group (EWG) petitioned the FDA this April to take regulatory action regarding hair smoothing treatments that contain methylene glycol. In the document8 available on their website, EWG cites numerous adverse events reported to the FDA.

“In fact, FDA has received at least 47 adverse event reports about these products since 2008, according to records obtained in response to several Freedom of Information Act (FOIA) requests.”

Beyond the concerns about cancer, the headaches, itching, burning eyes, and respiratory irritation, some of the adverse event reports involve hair loss:

“Within five days of the treatment I began losing large amounts of hair… experienced about a 40% volume loss in my hair and it continues to fall out at the same alarming pace[.]”

“After washing/rinsing [the] product out of her hair complainant immediately noted hair loss... Over time [her] hair became thin and she experienced more hair los[s][.]”

“My hair started falling out and continues to do so[.] I have been to my dermatologist and he confirms that my hair follicles have been damaged[.]”

“within a week had extreme hair loss which has not stopped

Although reports of hair loss following keratin straightening treatments appear to be few in number at this point, and there is no proof that the hair loss experienced by users was a direct result of the treatments they received, they may be worth keeping in mind when you’re choosing a solution for managing frizzy hair.

Keep checking back here on the Avacor® hair regrowth blog for updates on the safety issues surrounding keratin treatments and future regulatory actions taken by government agencies.


1. “Formaldehyde - Substance Profile” from the 12th Report on Carcinogens, National Toxicology Program, U.S. Department of Health and Human Services. June 10, 2011.

2. “Hazardous for Health? Roots of Brazilian Blowout.” Associated Press, via ABC News website. February 24, 2011. (accessed June 29, 2011)

3. “Salon Today Investigates Brazilian Keratin Services.” Modern Salon website. March 11, 2009. (accessed June 29, 2011)

4. “Hazard Alert - Hair Smoothing Products That Could Release Formaldehyde” Occupational Safety & Health Administration, U.S. Department of Labor. Updated June 9, 2011. (accessed June 29, 2011)

5. “Brazilian Blowout Solution Contains Formaldehyde: Update” Health Canada Advisory 2010-182. October 26, 2010.

6. “Concerns Relating to use of Certain Hair Straightening Products – Update.” Irish Medicines Board. November 29, 2010.

7. “‘Keratin-Based’ Hair Smoothing Products And the Presence of Formaldehyde.” Oregon OSHA and CROET at Oregon Health & Sciences University. October 29, 2010.

8. “Citizen Petition for Regulatory Action to Address Safety Concerns Surrounding Keratin Hair-Straighteners that Contain Formaldehyde and Formaldehyde Releasing Chemicals as Ingredients.” Environmental Working Group. April 12, 2011.