Psychology & Psychiatry

High potency pot 'strongly linked' to psychosis: study

High potency cannabis, especially when used daily, is "strongly linked" to the risk of developing psychotic disorders such as schizophrenia and paranoia, scientists said Wednesday.

Genetics

Tea consumption leads to epigenetic changes in women

Epigenetic changes are chemical modifications that turn our genes off or on. In a new study from Uppsala University, researchers show that tea consumption in women leads to epigenetic changes in genes that are known to interact ...

Neuroscience

How social isolation transforms the brain

Chronic social isolation has debilitating effects on mental health in mammals—for example, it is often associated with depression and post-traumatic stress disorder in humans. Now, a team of Caltech researchers has discovered ...

Psychology & Psychiatry

Researchers discover brain inflammation in people with OCD

A new brain imaging study by the Centre for Addiction and Mental Health (CAMH) shows for the first time that brain inflammation is significantly elevated - more than 30 per cent higher - in people with obsessive-compulsive ...

Health

JUUL electronic cigarette products linked to cellular damage

Little is known about the potential health effects of JUUL e-cigarette products that have recently risen in popularity, especially among adolescents. The Food and Drug Administration, or FDA, has a growing concern about this ...

Health

'Safe' herbicide in Australian water affects male fertility

The last 50 years has seen a rapid decline in male reproductive health. Decreased sperm counts, increased rates of testicular cancer and a range of malformations in male genitalia have been reported in industrialised countries ...

Health

How cannabis and cannabis-based drugs harm your brain

Long-term use of either cannabis or cannabis-based drugs impairs memory say researchers. The study has implications for both recreational users and people who use the drug to combat epilepsy, multiple sclerosis and chronic ...

Neuroscience

Resilience may be neurobiological

Neighborhood violence has been associated with adverse health effects on youth, including sleep loss, asthma and metabolic syndrome. Yet some youth living in high-crime neighborhoods manage to avoid these effects.

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Health effect

Health effects (or health impacts) are changes in health resulting from exposure to a source. Health effects are an important consideration in many areas, such as hygiene, pollution studies, workplace safety, nutrition and health sciences in general. Some of the major environmental sources of health effects are air pollution, water pollution, soil contamination, noise pollution and over-illumination.

A non-stochastic or deterministic health effect has a severity that is dependent on dose and is believed to have a threshold level for which no effect is seen. Stochastic health effects occur by chance, generally occurring without a threshold level of dose, whose probability is proportional to the dose and whose severity is independent of the dose, such as cancer and genetic effects.

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