Hormones

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What are the hormones that cause cravings during pregnancy? from www.shutterstock.com.au

Chemical messengers: how pregnancy hormones affect the body

Multiple hormones produced by the mother, placenta and the foetus drive and coordinate the amazing biological changes and development of the baby that occur with conception, foetal growth and birth.
The activities we do during the day – from having a fight with a partner to using our iPhones at night – also affect our hormone levels and, in turn, our quality of sleep. Jan Faukner/Shutterstock

Chemical messengers: how hormones help us sleep

Sleep allows many of our hormones to replenish so we have the optimal energy, immunity, appetite and coping ability to face the day’s highs and lows.
The hormone irisin is one of the things that makes exercise good for us. will ockenden/Flickr

The verdict is in: feel-good exercise hormone irisin is real

Scientists in the US have found that a feel-good exercise hormone called irisin does indeed exist in humans, putting to bed long-disputed claims that it is a myth.
Light from electronic devices can alter the quality of sleep our quality. Alexander Rentsch/Flickr

Booting up or powering down: how e-readers affect your sleep

While many of these devices, especially e-readers, seem harmless enough, the light they emit may affect our sleep patterns and leave us feeling tired the next day.
Menopausal women have been driven towards the false promises of bioidentical hormone therapy. Lisa F. Young/Shutterstock

‘Natural’ hormone therapy no panacea for menopause symptoms

Natural or bioidentical hormones are plant-derived products closely resembling the oestrogen, progesterone and testosterone produced in the body. The hormones are made up (compounded) in pharmacies to…
Beginning in middle age, blood levels of testosterone progressively decrease in some men. "El Gabo" - Davide Gabino/Flickr

Testosterone supplements: why the fuss?

A whole industry has grown around testosterone supplementation for ageing men. But neither the benefits nor risks of the practice are clear yet, and they remain the subject of ongoing research. Beginning…
Fight or flight? Bankers likely to opt for the second. BK and EP

Fear of risk linked to high stress hormone in bankers

In times of financial uncertainty and crisis, high stress reactions lead to traders becoming more risk averse, which drives pessimism and further falls in finance, according to a new study. This is because…
Medicine residues that we flush down the toilet can affect fish and other wildlife. Chris Ison/PA

Popping pills can harm wildlife via a trip to the loo

It’s not a thought that occurs to most of us, but flushing the toilet doesn’t just mean disposing of our bodily waste. We’re also flushing away some of the medicine we take down with it. Our contraceptive…

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