Healthy diet costs $550 more per year than unhealthy one

A new Harvard analysis of the best evidence available on the price differences between the healthiest and unhealthiest diets finds that on average, individuals need to spend about $1.50 more per day, or around $550 a year, to keep to the healthiest diets.

Scientists find vast new freshwater sources under the sea

Scientists have discovered huge reserves of freshwater kilometres out to the sea, providing new opportunities to stave off a looming global water crisis.A new study, published in the international scientific journal Nature, reveals that an estimated half a million cubic kilometres of low-salinity water are buried beneath the seabed on continental shelves around the world.

Doubts cast over benefits of vitamin D supplements

Low vitamin D levels are a consequence of ill health, not a cause, say researchers from Lyon, France. This casts strong doubts on the benefit of vitamin D supplements as a preventative measure against disease.Lack of vitamin D has been linked to an array of medical conditions, from anemia, depression and pain, to brain damage.