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Monthly Archives: October 2009

Products Containing Lavender and Tea Tree Oil May Cause Moobs, Gynecomastia

It is a known fact that excessive estrogen production in men can cause development of breasts, known as gynecomastia, nickname moobs (male boobs).
Researchers have been looking at the possible causes of excessive estrogen production “in  vitro” (an artificial environment outside the human body) and “in vivo” within the human body. And the result is inconclusive as with many studies. Why will the very same conditions effect one man and not another? No one knows. However it is interesting to be aware of what researchers are looking at and then you can make a decision for yourself.Lavender Oil - pic
Hormone treatment in animals has long been believed to cause breast development in men, and therefore have been outlawed in most countries for years, (Australia’s beef however is an exception). The incidence of “moobs” is still on the increase causing researcher’s to continue their quest to find the cause or causes.   �
In the last couple of years, lavender oil and tea tree oil have come under scrutiny. A report in WebMD whose source is The New England Journal of Medicine states:
(WebMD)  Repeated use of products containing lavender oil or tea tree oil may spur breast growth in prepubertal boys, experts report in The New England Journal of Medicine.
“This report raises an issue of concern, since lavender and tea tree oil are sold over the counter in their ‘pure’ form and are present in an increasing number of commercial products, including shampoos, hair gels, soaps, and body lotions,” write researchers Derek Henley, Ph.D., and others. Henley works at the National Institute of Environmental Health Sciences (NIEHS), which is part of the National Institutes of Health (NIH).

“We want to encourage doctors who may be seeing patients with gynecomastia to ask their patients about the products they are using,” says Henley’s colleague, Kenneth Korach, PhD, in a NIEHS news release. “Patients with prepubertal gynecomastia may want to consider reducing the use of products that contain these oils,” says Korach.

Henley and colleagues investigated reports of three healthy boys who hadn’t started puberty and who developed breasts, a condition called gynecomastia, after using products containing lavender or tea tree oils.

It’s rare for prepubertal boys to develop breasts, the researchers note.

One of the boys was 4 years old. His mother had applied “healing balm” containing lavender oil to his skin shortly before the boy’s breasts developed and grew to about an inch in diameter.

Another boy was 10 and had been using a hair-styling gel daily that contained lavender and tea tree oils.

The third boy — nearly 8 — had been using lavender-scented soap and skin lotions. His fraternal twin had used the same products but didn’t develop breasts.

The boys’ breasts receded within months after they stopped using the products.

Henley’s team conducted lab tests on human breast cells exposed to lavender and tea tree oils. The tests showed that lavender and tea tree oils may boost estrogen (a sex hormone that promotes female characteristics and is linked to breast development) and hamper androgens (sex hormones that promote male characteristics and inhibit breast growth).

The researchers call for more observational studies to track prepubertal gynecomastia in boys using such products.

Henley and colleagues don’t mention specific products in their report, and they’re not ruling out the possibility that the boys’ breast growth may have stemmed from other causes.

It’s often hard to pinpoint the exact cause of gynecomastia, the researchers note.

However, “We conclude that repeated topical exposure to lavender and tea tree oils probably caused prepubertal gynecomastia in these boys,” write Henley and colleagues.
“We do not anticipate any long-term effects on hormone levels” in the boys, Henley says in an NIEHS news release.
SOURCES: Henley, D. The New England Journal of Medicine, Feb. 1, 2007; Vol. 356: pp. 479-485. News release, National Institute of Environmental Health Sciences, National Institutes of Health.

And then Wikipedia has this to say about the above report:
Lavender oil has recently been implicated in gynecomastia, the abnormal development of breasts in young boys. Denver endocrinologist Clifford Bloch hypothesized the link after three boys presented with enlarged breasts. Subsequently, Derek Henley and Kenneth Korach of the National Institute of Environmental Health Sciences in Research Triangle Park, N.C., discovered in lavender and tea tree oil the presence of compounds which both suppress male hormones and mimic female hormones.
Because sex hormone levels normally are low prior to puberty, young boys and girls particularly are sensitive to estrogenic and androgenic compounds. The discovery of the gynecomastia link in boys has led some researchers to suspect lavender and tea tree oils, which are present in various personal care products including shampoos and lotions, may also contribute to the increased incidence of early breast development in girls.
Discontinuation of use of these products resulted in rapid reversal of gynecomastia in Bloch’s young patients.[4][5]
However, the conclusion that the gynecomastia actually was caused by the essential oils in the products used by the three boys are currently being disputed by the Natural Artisan Perfumers Guild and Cropwatch on the claimed basis of insufficient evidence.

As you can see the jury is still out on the causes of gynecomastia for the individual man. The best advice is to consult with your doctor and go over your personal medical history in detail to determine your best course of action.

Traveling to San Francisco for Gynecomastia Surgery


The hardest part is making the decision to move forward with gynecomastia surgery, hopefully after speaking with your surgeon, your questions have been answered and you feel a huge relief knowing someone out there is able to Fly in to San Francisco for Gynecomastia Surgeryhelp you. But your surgeon is not geographically close to you, in fact perhaps in a city or state you have never even been to. After your phone consultation with Miguel A. Delgado, Jr., M.D., he will put you in touch with his patient coordinator who will help you every step of the way. Dr. Delgado does surgery on Mondays and Thursdays. Most guys want to return home as soon as possible. We have found that for our out of town patients that Thursdays work the best so that you may be seen Wednesday, the day before surgery, at our San Francisco office for your pre operative visit. Usually with a Thursday surgery it is possible to leave for home the following Tuesday after your post operative appointment. Once your surgery date has been determined, Dr. Delgado will want you to have a blood test to make sure you are healthy and can proceed with surgery. This should be done prior to making your travel plans! We can mail the lab request to you or your own doctor can order it. The tests results needed are for a CBC (complete blood count) and a PT/PTT (which determines blood clotting time). Dr. Delgado wants to be sure that there will not be any bleeding issues during surgery. After Dr. Delgado evaluates the results of your blood test and approves you for surgery, you can proceed with your travel arrangements. Let us know if you are coming by car or plane so that we can help you with directions. Ideally you will have a family member or friend traveling with you as you do need someone to stay with you at your hotel the first night of your surgery. We know that sometimes it is not possible to have someone come with you; in that case we have well trained care givers that we can help make arrangements to stay Novato Oaks Innwith you. There are several hotels nearby our Novato location which is where our surgery center is. We recommend The Novato Oaks Inn, which is only a mile or two from the office. If you mention that you are a patient of Dr. Delgado’s they will give you the corporate rate. They have a very nice restaurant on the premises, and also room service. If you do not have a car or wish to rent one, the hotel has a free shuttle service to our office. To see additional services and make reservations you may go to their website www.novatooaksinn.com or call their toll free number…..After you have returned home, Dr. Delgado will want to monitor your healing progress and has found that if patients email photos, he is able to do this very well. If you have any concerns or issues you will be relieved to find how easy it is to reach him by phone.

Gynecomastia Surgeon for Male Breast Reduction


It is quite a journey to find out all you can about “moobs”, man boobs, male breasts, or technically known as “gynecomastia”. Not long ago you couldn’t even find gynecomastia in the dictionary, 1995 edition of Webster’s (not there, I checked).
Men rarely discuss such issues with each other. Women on the other hand can discuss their latest trip to their plastic surgeon in the same conversation and ease that they discuss their last hair appointment. Now with the vast amount of information available on the internet men can and do research this sensitive condition in the privacy of their own home. Some sites such as www.gynecomastia.org even have chat rooms and message boards where men can ask questions of each other and share their experiences.
After many hours of research, one may decide to go to the next step for scheduling surgery. What might that be?GynecomastiaSpecialist.com Finding the right surgeon. Back to the internet, read as much as you can about surgeons that specialize in male breast reduction. We see too many patients that have spent thousands of dollars, and are unhappy with their result. Secondary surgery is more complicated because there is scar tissue involved and sometimes too much breast tissue was removed that can cause unnatural chest contouring.
So now you have narrowed your search down to maybe 2 or 3 surgeons in all of the United States that have excellent reputations for performing gynecomastia surgery. You have found a surgeon that does at least 100 cases a year, you have seen before and after photos of many of his/her patients and you have had a complimentary personal phone consultation with the doctor and now you have picked your surgeon….but your surgeon is a thousand, maybe two thousand miles away, now what?
This is not a new situation at the office of Miguel A. Delgado, Jr., M.D. For years patients have been seeking out Dr. Delgado for his expertise in male breast reduction, now popularly known as moobs. Patients have come to our offices in San Francisco and Novato from all over the world; Afghanistan, Australia, England, Italy, China and Hawaii to name just a few.….if they can do it, so can you. We will help you every step of the way. In our next blog we will give you more specific information on how we do this. However, if you want information now, please contact us at (415) 898-4161 or email info@dr-delgado.com. Also, you might want to check out Dr. Delgado’s new website dedicated solely to gynecomastia.

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__ Contact Us For a Consultation

To schedule a consultation with Dr. Delgado in San Francisco, California or Novato in Marin County call 415-830-8883. You may also send us a e-mail at info@DR-Delgado.com or fill out our quick contact form. Send photos of your chest for a complimentary virtual consultation TODAY. We have a complimentary travel package for out of town patients that include travel to and from the airport, four nights stay at the Novato Oaks Inn and travel from the hotel to the office.

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Dr. Delgado has offices in Marin and San Francisco for your convenience


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450 Sutter Street Suite 2433
San Francisco, California 94108
(415) 989-2221



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165 Rowland Way Suite 300
Novato, CA 94945
(415) 898-4161


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