Why hair turns grey

Scientists researching into skin cancer have stumbled on an explanation as to why hair follicles turn grey, although a magic cure is still a long way off.

A report posted in the journal Science by the Boston-based Dana-Farber Cancer Institute traces the loss of hair colour to the gradual dying off of adult stem cells, called melanocytes, that provide a reservoir for the renewal of pigment-manufacturing cells.

The discovery was made while scientists were researching the origins of malignant melanoma, a potentially deadly form of skin cancer if it is not detected early enough.

Also diminishes shine
The scientific team said that its research showed that the loss of melanocytes not only leads to a greying of the hair, but it also diminishes hues that give the hair shaft a shiny, healthier and more youthful looking appearance.

Melanocytes, which manufacture and store the pigment that combines with hair-making cells called keratinocytes to colour the hair, are specialised cells spawned by colourless melanocyte stem cells.

What actually happens during the greying process is that the melanocyte cells not only become depleted, they also make errors as they age, turning into 'fully committed' pigment cells that position themselves in the wrong part of the hair follicle, thus leading to a loss of pigmentation.

However, although the findings have helped crack the reason why hair follicles actually go through the greying process, the scientific team claims that its research is concentrated on finding how melanocytes proliferate uncontrollably in skin cells to form tumours, rather than pursuing the greying process.

It is not our goal
''Preventing the greying of hair is not our goal,'' emphasises David Fisher, MD, PhD, director of the Dana-Farber Program in Melanoma, and senior author of the Science paper.

''Our goal is to prevent or treat melanoma, and to the extent that this research is revealing the life cycles of melanocytes, which are the cells that become cancerous in melanoma, we would love to identify a signal that would make a melanoma cell stop growing.''

The discovery and the fact that the team will not be pursuing the reasons behind the greying process any further, suggests there might be significant opportunities for cosmetic and personal care researchers to take up where the research has left off, in an effort to make further progress in the field.

This could in turn lead to more effective dyes to cover grey hair, or possibly the discovery of treatments to either reverse or prevent the greying process, although this kind of treatment is still thought to be some way off.

Hair care is rapidly becoming a part of the growing anti-ageing phenomenon as formulators race to include SPFs and a host of restorative ingredients in shampoos, conditioner and styling products. – (Decision News Media, March 2007)

Read more:
Anti-ageing Centre
Grey hair may have value afterall

March 2007

We live in a world where facts and fiction get blurred
In times of uncertainty you need journalism you can trust. For 14 free days, you can have access to a world of in-depth analyses, investigative journalism, top opinions and a range of features. Journalism strengthens democracy. Invest in the future today. Thereafter you will be billed R75 per month. You can cancel anytime and if you cancel within 14 days you won't be billed. 
Subscribe to News24
Voting Booth
The ANC's leadership race is heating up. Who do you think will be elected party president at Nasrec in December?
Please select an option Oops! Something went wrong, please try again later.
Results
Nkosazana Dlamini-Zuma has got it in the bag
7% - 460 votes
I foresee a second term for Cyril Ramaphosa
82% - 5745 votes
Don’t discount a Zweli Mkhize win
11% - 761 votes
Vote
Rand - Dollar
18.01
+0.3%
Rand - Pound
20.18
-0.1%
Rand - Euro
17.59
+0.5%
Rand - Aus dollar
11.63
-0.4%
Rand - Yen
0.12
+0.5%
Gold
1,666.29
+0.3%
Silver
19.43
+2.1%
Palladium
2,187.00
+1.0%
Platinum
869.00
+0.5%
Brent Crude
85.14
-2.4%
Top 40
57,387
0.0%
All Share
63,698
-0.1%
Resource 10
60,697
+0.8%
Industrial 25
77,071
-0.4%
Financial 15
13,769
-0.2%
All JSE data delayed by at least 15 minutes Iress logo
Editorial feedback and complaints

Contact the public editor with feedback for our journalists, complaints, queries or suggestions about articles on News24.

LEARN MORE