Potent cannabis increases risk of serious mental illness, says study

Smoking potent 'skunk-like' cannabis increases your risk of serious mental illness, say researchers.
They estimate around one in 10 new cases of psychosis may be associated with strong cannabis, based on their study of European cities and towns.
In London and Amsterdam, where most of the cannabis that is sold is very strong, the risk could be much more, they say in The Lancet Psychiatry, according to BBC.
Daily use of any cannabis also makes psychosis more likely, they found.
Experts say people should be aware of the potential risks to health, even though the study is not definitive proof of harm.

Cancer's 'internal wiring' predicts relapse risk

The "internal wiring" of breast cancer can predict which women are more likely to survive or relapse, say researchers.
The study shows that breast cancer is 11 separate diseases that each has a different risk of coming back.
The hope is that the findings, in the journal Nature, could identify people needing closer monitoring and reassure others at low risk of recurrence, according to BBC.
Cancer Research UK said that the work was "incredibly encouraging" but was not yet ready for widespread use.

What are LASIK surgery complications and how often do they happen?

LASIK eye surgery is a surgical procedure done on a person’s eyes to improve their vision. The surgery is done with a laser and permanently changes the shape of a person’s cornea (the clear front part of your eye). The hope is that after having surgery, a person will be able to stop wearing glasses or contacts, or to reduce their use of them.

As with any surgery, there are risks to having this procedure. Dry eyes can be an issue for the first six months or so after surgery, and that can reduce your quality of vision. Patients may also see glares or halos, experience double vision, develop an infection or problem with excess tears, or, in rare cases, even lose their vision.

Mushrooms may 'reduce the risk of mild brain decline'

Eating mushrooms more than twice a week could prevent memory and language problems occurring in the over-60s, research from Singapore suggests.

A unique antioxidant present in mushrooms could have a protective effect on the brain, the study found.
The more mushrooms people ate, the better they performed in tests of thinking and processing, according to BBC.
But researchers said it was not possible to prove a direct link between the fungi and brain function.

More vitamin D may improve memory but too much may slow reaction time

How much vitamin D can boost memory, learning and decision-making in older adults, and how much is too much?

A unique Rutgers-led study found that overweight and obese older women who took more than three times the recommended daily dose of vitamin D showed improvements in memory and learning -- but also had slower reaction times. The researchers hypothesize that slower reaction times may increase the risk of falling among older people, according to Science Daily.