After several highly publicised alleged murders of women in Australia, the Albanese government this week pledged more than A$925 million over five years to address men’s violence towards women. This includes up to $5,000 to support those escaping violent relationships.

However, to reduce and prevent gender-based and intimate partner violence we also need to address the root causes and contributors. These include alcohol and other drugs, trauma and mental health issues.

Why is this crucial?

The World Health Organization estimates 30% of women globally have experienced intimate partner violence, gender-based violence or both. In Australia, 27% of women have experienced intimate partner violence by a co-habiting partner; almost 40% of Australian children are exposed to domestic violence.

By gender-based violence we mean violence or intentionally harmful behaviour directed at someone due to their gender. But intimate partner violence specifically refers to violence and abuse occurring between current (or former) romantic partners. Domestic violence can extend beyond intimate partners, to include other family members.

These statistics highlight the urgent need to address not just the aftermath of such violence, but also its roots, including the experiences and behaviours of perpetrators.

What’s the link with mental health, trauma and drugs?

The relationships between mental illness, drug use, traumatic experiences and violence are complex.

When we look specifically at the link between mental illness and violence, most people with mental illness will not become violent. But there is evidence people with serious mental illness can be more likely to become violent.

The use of alcohol and other drugs also increases the risk of domestic violence, including intimate partner violence.

About one in three intimate partner violence incidents involve alcohol. These are more likely to result in physical injury and hospitalisation. The risk of perpetrating violence is even higher for people with mental ill health who are also using alcohol or other drugs.

It’s also important to consider traumatic experiences. Most people who experience trauma do not commit violent acts, but there are high rates of trauma among people who become violent.

For example, experiences of childhood trauma (such as witnessing physical abuse) can increase the risk of perpetrating domestic violence as an adult.

Early traumatic experiences can affect the brain and body’s stress response, leading to heightened fear and perception of threat, and difficulty regulating emotions. This can result in aggressive responses when faced with conflict or stress.

This response to stress increases the risk of alcohol and drug problems, developing PTSD (post-traumatic stress disorder), and increases the risk of perpetrating intimate partner violence.

How can we address these overlapping issues?

We can reduce intimate partner violence by addressing these overlapping issues and tackling the root causes and contributors.

The early intervention and treatment of mental illness, trauma (including PTSD), and alcohol and other drug use, could help reduce violence. So extra investment for these are needed. We also need more investment to prevent mental health issues, and preventing alcohol and drug use disorders from developing in the first place.

Preventing trauma from occuring and supporting those exposed is crucial to end what can often become a vicious cycle of intergenerational trauma and violence. Safe and supportive environments and relationships can protect children against mental health problems or further violence as they grow up and engage in their own intimate relationships.

We also need to acknowledge the widespread impact of trauma and its effects on mental health, drug use and violence. This needs to be integrated into policies and practices to reduce re-traumatising individuals.

How about programs for perpetrators?

Most existing standard intervention programs for perpetrators do not consider the links between trauma, mental health and perpetrating intimate partner violence. Such programs tend to have little or mixed effects on the behaviour of perpetrators.

But we could improve these programs with a coordinated approach including treating mental illness, drug use and trauma at the same time.

Such “multicomponent” programs show promise in meaningfully reducing violent behaviour. However, we need more rigorous and large-scale evaluations of how well they work.

What needs to happen next?

Supporting victim-survivors and improving interventions for perpetrators are both needed. However, intervening once violence has occurred is arguably too late.

We need to direct our efforts towards broader, holistic approaches to prevent and reduce intimate partner violence, including addressing the underlying contributors to violence we’ve outlined.

We also need to look more widely at preventing intimate partner violence and gendered violence.

We need developmentally appropriate education and skills-based programs for adolescents to prevent the emergence of unhealthy relationship patterns before they become established.

We also need to address the social determinants of health that contribute to violence. This includes improving access to affordable housing, employment opportunities and accessible health-care support and treatment options.

All these will be critical if we are to break the cycle of intimate partner violence and improve outcomes for victim-survivors.

The National Sexual Assault, Family and Domestic Violence Counselling Line – 1800 RESPECT (1800 737 732) – is available 24 hours a day, seven days a week for any Australian who has experienced, or is at risk of, family and domestic violence and/or sexual assault.

If this article has raised issues for you, or if you’re concerned about someone you know, call Lifeline on 13 11 14. In an emergency, call 000.

Siobhan O’Dean, Postdoctoral Research Associate, The Matilda Centre for Research in Mental Health and Substance Use, University of Sydney; Lucinda Grummitt, Postdoctoral Research Fellow, The Matilda Centre for Research in Mental Health and Substance Use, University of Sydney, and Steph Kershaw, Research Fellow, The Matilda Centre for Research in Mental Health and Substance Use, University of Sydney

This article is republished from The Conversation under a Creative Commons license. Read the original article.

When we start to go grey depends a lot on genetics.

Your first grey hairs usually appear anywhere between your twenties and fifties. For men, grey hairs normally start at the temples and sideburns. Women tend to start greying on the hairline, especially at the front.

The most rapid greying usually happens between ages 50 and 60. But does anything we do speed up the process? And is there anything we can do to slow it down?

You’ve probably heard that plucking, dyeing and stress can make your hair go grey – and that redheads don’t. Here’s what the science says.

What gives hair its colour?

Each strand of hair is produced by a hair follicle, a tunnel-like opening in your skin. Follicles contain two different kinds of stem cells:

• keratinocytes, which produce keratin, the protein that makes and regenerates hair strands
• melanocytes, which produce melanin, the pigment that colours your hair and skin.

There are two main types of melanin that determine hair colour. Eumelanin is a black-brown pigment and pheomelanin is a red-yellow pigment.

The amount of the different pigments determines hair colour. Black and brown hair has mostly eumelanin, red hair has the most pheomelanin, and blonde hair has just a small amount of both.

So what makes our hair turn grey?

As we age, it’s normal for cells to become less active. In the hair follicle, this means stem cells produce less melanin – turning our hair grey – and less keratin, causing hair thinning and loss.

As less melanin is produced, there is less pigment to give the hair its colour. Grey hair has very little melanin, while white hair has none left.

Unpigmented hair looks grey, white or silver because light reflects off the keratin, which is pale yellow.

Grey hair is thicker, coarser and stiffer than hair with pigment. This is because the shape of the hair follicle becomes irregular as the stem cells change with age.

Interestingly, grey hair also grows faster than pigmented hair, but it uses more energy in the process.

Can stress turn our hair grey?

Yes, stress can cause your hair to turn grey. This happens when oxidative stress damages hair follicles and stem cells and stops them producing melanin.

Oxidative stress is an imbalance of too many damaging free radical chemicals and not enough protective antioxidant chemicals in the body. It can be caused by psychological or emotional stress as well as autoimmune diseases.

Environmental factors such as exposure to UV and pollution, as well as smoking and some drugs, can also play a role.

Melanocytes are more susceptible to damage than keratinocytes because of the complex steps in melanin production. This explains why ageing and stress usually cause hair greying before hair loss.

Scientists have been able to link less pigmented sections of a hair strand to stressful events in a person’s life. In younger people, whose stems cells still produced melanin, colour returned to the hair after the stressful event passed.

4 popular ideas about grey hair – and what science says

1. Does plucking a grey hair make more grow back in its place?

No. When you pluck a hair, you might notice a small bulb at the end that was attached to your scalp. This is the root. It grows from the hair follicle.

Plucking a hair pulls the root out of the follicle. But the follicle itself is the opening in your skin and can’t be plucked out. Each hair follicle can only grow a single hair.

It’s possible frequent plucking could make your hair grey earlier, if the cells that produce melanin are damaged or exhausted from too much regrowth.

2. Can my hair can turn grey overnight?

Legend says Marie Antoinette’s hair went completely white the night before the French queen faced the guillotine – but this is a myth.

Melanin in hair strands is chemically stable, meaning it can’t transform instantly.

Acute psychological stress does rapidly deplete melanocyte stem cells in mice. But the effect doesn’t show up immediately. Instead, grey hair becomes visible as the strand grows – at a rate of about 1 cm per month.

Not all hair is in the growing phase at any one time, meaning it can’t all go grey at the same time.

3. Will dyeing make my hair go grey faster?

This depends on the dye.

Temporary and semi-permanent dyes should not cause early greying because they just coat the hair strand without changing its structure. But permanent products cause a chemical reaction with the hair, using an oxidising agent such as hydrogen peroxide.

Accumulation of hydrogen peroxide and other hair dye chemicals in the hair follicle can damage melanocytes and keratinocytes, which can cause greying and hair loss.

4. Is it true redheads don’t go grey?

People with red hair also lose melanin as they age, but differently to those with black or brown hair.

This is because the red-yellow and black-brown pigments are chemically different.

Producing the brown-black pigment eumelanin is more complex and takes more energy, making it more susceptible to damage.

Producing the red-yellow pigment (pheomelanin) causes less oxidative stress, and is more simple. This means it is easier for stem cells to continue to produce pheomelanin, even as they reduce their activity with ageing.

With ageing, red hair tends to fade into strawberry blonde and silvery-white. Grey colour is due to less eumelanin activity, so is more common in those with black and brown hair.

Your genetics determine when you’ll start going grey. But you may be able to avoid premature greying by staying healthy, reducing stress and avoiding smoking, too much alcohol and UV exposure.

Eating a healthy diet may also help because vitamin B12, copper, iron, calcium and zinc all influence melanin production and hair pigmentation.

Theresa Larkin, Associate Professor of Medical Sciences, University of Wollongong

This article is republished from The Conversation under a Creative Commons license. Read the original article.