Featured Research

from universities, journals, and other organizations

Common Fragrance Ingredients In Shampoos And Conditioners Are Frequent Causes Of Eczema

Date:
March 29, 2009
Source:
University of Gothenburg
Summary:
Considerably more people than previously believed are allergic to the most common fragrance ingredient used in shampoos, conditioners and soap. New research from Sweden found that over 5 percent of those who underwent patch testing were allergic to the air oxidized form of the fragrance ingredient linalool.

Considerably more people than previously believed are allergic to the most common fragrance ingredient used in shampoos, conditioners and soap. A thesis presented at the Sahlgrenska Academy, University of Gothenburg, Sweden found that over 5% of those who underwent patch testing were allergic to the air oxidized form of the fragrance ingredient linalool.

Related Articles


“I would suspect that about 2% of the complete population of Sweden are allergic to air oxidized linalool. That may not sound very much, but it is serious since linalool is so widely used as a fragrance ingredient. Linalool is found in 60-80 percent of the perfumed hygiene products, washing up liquids and household cleaning agents that can be bought in the nearest supermarket, and it can be difficult for people who are allergic to avoid these products,” says dermatologist Johanna Bråred Christensson, author of the thesis.

Around one person in five in Sweden has some form of contact allergy. Nickel is by far the most common substance that causes eczema, but the thesis shows that oxidized linalool occupies third place in the list, after nickel and cobalt.

In the study, oxidized linalool was added at patch testing for more than 3,000 patients who wanted to find out what was causing their eczema. Between 5% and 7% proved to be allergic to the oxidized form of the fragrance ingredient.

“Linalool is present in many products around us, and this is probably the reason that contact allergy to this material is so common. Some people can shower with shower cream that contains linalool but never develop contact allergy, but we know that the risk increases as the exposure to t! he substance increases,” says Bråred Christensson.

Linalool is a fragrance ingredient found naturally in lavender, mint, and other plants. Linalool breaks down when it comes into contact with oxygen, it becomes oxidized and can cause allergy. Manufacturers do include other substances in the products to delay this oxidation process, but allergenic substances can st! ill be formed from linalool when it is stored.

“One way of trying to minimize exposure to oxidized linalool is to avoid buying large packs of soap and shower cream, and always to replace the top after using a bottle,” says Bråred Christensson.

EU legislation states that manufacturers must specify on the labels of hygiene products whether they contain linalool. Previous studies have shown that oxidized linalool may cause contact allergy in about 1% of patients with eczema.


Story Source:

The above story is based on materials provided by University of Gothenburg. Note: Materials may be edited for content and length.


Journal References:

  1. Bråred Christensson et al. Air oxidation increases skin irritation from fragrance terpenes. Contact Dermatitis, 2009; 60 (1): 32 DOI: 10.1111/j.1600-0536.2008.01471.x
  2. Bråred Christensson et al. Hydroperoxides form specific antigens in contact allergy. Contact Dermatitis, 2006; 55 (4): 230 DOI: 10.1111/j.1600-0536.2006.00913.x
  3. Bråred Christensson et al. Limonene hydroperoxide analogues differ in allergenic activity. Contact Dermatitis, 2008; 59 (6): 344 DOI: 10.1111/j.1600-0536.2008.01442.x

Cite This Page:

University of Gothenburg. "Common Fragrance Ingredients In Shampoos And Conditioners Are Frequent Causes Of Eczema." ScienceDaily. ScienceDaily, 29 March 2009. <www.sciencedaily.com/releases/2009/03/090329205558.htm>.
University of Gothenburg. (2009, March 29). Common Fragrance Ingredients In Shampoos And Conditioners Are Frequent Causes Of Eczema. ScienceDaily. Retrieved November 27, 2014 from www.sciencedaily.com/releases/2009/03/090329205558.htm
University of Gothenburg. "Common Fragrance Ingredients In Shampoos And Conditioners Are Frequent Causes Of Eczema." ScienceDaily. www.sciencedaily.com/releases/2009/03/090329205558.htm (accessed November 27, 2014).

Share This


More From ScienceDaily



More Health & Medicine News

Thursday, November 27, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Ebola Leaves Orphans Alone in Sierra Leone

Ebola Leaves Orphans Alone in Sierra Leone

AFP (Nov. 27, 2014) — The Ebola epidemic sweeping Sierra Leone is having a profound effect on the country's children, many of whom have been left without any family members to support them. Duration: 01:02 Video provided by AFP
Powered by NewsLook.com
Experimental Ebola Vaccine Shows Promise In Human Trial

Experimental Ebola Vaccine Shows Promise In Human Trial

Newsy (Nov. 27, 2014) — A recent test of a prototype Ebola vaccine generated an immune response to the disease in subjects. Video provided by Newsy
Powered by NewsLook.com
Pet Dogs to Be Used in Anti-Ageing Trial

Pet Dogs to Be Used in Anti-Ageing Trial

Reuters - Innovations Video Online (Nov. 26, 2014) — Researchers in the United States are preparing to discover whether a drug commonly used in human organ transplants can extend the lifespan and health quality of pet dogs. Video provided by Reuters
Powered by NewsLook.com
Today's Prostheses Are More Capable Than Ever

Today's Prostheses Are More Capable Than Ever

Newsy (Nov. 26, 2014) — Advances in prosthetics are making replacement body parts stronger and more lifelike than they’ve ever been. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins