[Home]  [Headlines]  [Latest Articles]  [Latest Comments]  [Post]  [Sign-in]  [Mail]  [Setup]  [Help] 

Status: Not Logged In; Sign In

“The government wants to make sure that that does not come out. A huge part of our political system is predicated on blackmail,”

You Know What Happens Next

Cash Jordan: Half-Built Tower Abandoned… as ICE Deports Entire ‘Migrant Workforce’

Heavy rainfall causes flash flooding Tuesday night, some cars stuck in high water on Chicago's West

Biden Doctor PLEADS THE FIFTH, Refuses To Testify To Congress, Biden Pardons ARE VOID

Joe Rogan says FBI director Kash Patel played him for a fool and maga for fools with the Jeff Epstein files

Elon's AI System "Grok" Went Rogue And Has Been SHUT DOWN in an Emergency!

Earthquake Swarms at One of the MOST DANGEROUS Volcanoes in the USA

Ben Shapiro Declares Epstein Case CLOSED: ‘Facts on the Ground Have Changed’

Iran receives 40 Chinese J10-C Fighter Jets

China’s Railgun Is Now Battle-Ready, Thanks to Nuclear Power

Chinese Hypersonic Advancements! Deadly new missile could decimate entire US fleet in 20 minutes

Iran Confirms Massive Chinese HQ 9 B Missile Deal

Why Is Europe Hitting 114°F And Still Rising?

The INCREDIBLE Impacts of Methylene Blue

The LARGEST Eruptions since the Merapi Disaster in 2010 at Lewotobi Laki Laki in Indonesia

Feds ARREST 11 Leftists For AMBUSH On ICE, 2 Cops Shot, Organized Terror Cell Targeted ICE In Texas

What is quantum computing?

12 Important Questions We Should Be Asking About The Cover Up The Truth About Jeffrey Epstein

TSA quietly scraps security check that every passenger dreads

Iran Receives Emergency Airlift of Chinese Air Defence Systems as Israel Considers New Attacks

Russia reportedly used its new, inexpensive Chernika kamikaze drone in the Ukraine

Iran's President Says the US Pledged Israel Wouldn't Attack During Previous Nuclear Negotiations

Will Japan's Rice Price Shock Lead To Government Collapse And Spark A Global Bond Crisis

Beware The 'Omniwar': Catherine Austin Fitts Fears 'Weaponization Of Everything'

Roger Stone: AG Pam Bondi Must Answer For 14 Terabytes Claim Of Child Torture Videos!

'Hit Us, Please' - America's Left Issues A 'Broken Arrow' Signal To Europe

Cash Jordan Trump Deports ‘Thousands of Migrants’ to Africa… on Purpose

Gunman Ambushes Border Patrol Agents In Texas Amid Anti-ICE Rhetoric From Democrats

Texas Flood


Miscellaneous
See other Miscellaneous Articles

Title: Special Scent of Age: Body Odor Gives Away Age
Source: [None]
URL Source: http://www.sciencedaily.com/releases/2012/05/120530172426.htm
Published: May 30, 2012
Author: staff
Post Date: 2012-05-31 04:25:59 by Tatarewicz
Keywords: None
Views: 213
Comments: 4

ScienceDaily (May 30, 2012) — New findings from the Monell Center reveal that humans can identify the age of other humans based on differences in body odor. Much of this ability is based on the capacity to identify odors of elderly individuals, and contrary to popular supposition, the so-called 'old-person smell' is rated as less intense and less unpleasant than body odors of middle-aged and young individuals.

"Similar to other animals, humans can extract signals from body odors that allow us to identify biological age, avoid sick individuals, pick a suitable partner, and distinguish kin from non-kin," said senior author Johan Lundström, a sensory neuroscientist at Monell.

Like non-human animals, human body odors contain a rich array of chemical components that can transmit various types of social information. The perceptual characteristics of these odors are reported to change across the lifespan, as are concentrations of the underlying chemicals.

Scientists theorize that age-related odors may help animals select suitable mates: older males might be desirable because they contribute genes that enable offspring to live longer, while older females might be avoided because their reproductive systems are more fragile.

In humans, a unique 'old person smell' is recognized across cultures. This phenomenon is so acknowledged in Japan that there is a special word to describe this odor, kareishk.

Because studies with non-human animals at Monell and other institutions have demonstrated the ability to identify age via body odor, Lundström's team examined whether humans are able to do the same.

In the study, published in the journal PLoS ONE, body odors were collected from three age groups, with 12-16 individuals in each group: Young (20-30 years old), Middle-age (45-55), and Old-age (75-95). Each donor slept for five nights in unscented t-shirts containing underarm pads, which were then cut into quadrants and placed in glass jars.

Odors were assessed by 41 young (20-30 years old) evaluators, who were given two body odor glass jars in nine combinations and asked to identify which came from the older donors. Evaluators also rated the intensity and pleasantness of each odor. Finally evaluators were asked to estimate the donor's age for each odor sample.

Evaluators were able to discriminate the three donor age categories based on odor cues. Statistical analyses revealed that odors from the old-age group were driving the ability to differentiate age. Interestingly, evaluators rated body odors from the old-age group as less intense and less unpleasant than odors from the other two age groups.

"Elderly people have a discernible underarm odor that younger people consider to be fairly neutral and not very unpleasant," said Lundström. "This was surprising given the popular conception of old age odor as disagreeable. However, it is possible that other sources of body odors, such as skin or breath, may have different qualities."

Future studies will both attempt to identify the underlying biomarkers that evaluators use to identify age-related odors and also determine how the brain is able to identify and evaluate this information.


Poster Comment:

Why the same sweaty man smells sweet like vanilla to one person and repellent like urine to another comes down to the smeller's genes. http://www.sciencedaily.com/releases/2007/09/070916143523.htm

Post Comment   Private Reply   Ignore Thread  


TopPage UpFull ThreadPage DownBottom/Latest

Begin Trace Mode for Comment # 1.

#1. To: Tatarewicz (#0)

deleted

Eric Stratton  posted on  2012-05-31   8:50:28 ET  Reply   Untrace   Trace   Private Reply  


Replies to Comment # 1.

#3. To: Eric Stratton (#1)

Embedding disallowed

TooConservative  posted on  2012-05-31 16:10:49 ET  Reply   Untrace   Trace   Private Reply  


End Trace Mode for Comment # 1.

TopPage UpFull ThreadPage DownBottom/Latest


[Home]  [Headlines]  [Latest Articles]  [Latest Comments]  [Post]  [Sign-in]  [Mail]  [Setup]  [Help]