Our bodies need cholesterol to function properly, but not too much. The waxy, pale yellow fat is found in our blood, and is crucial to the production of cell membranes, vitamin D, hormones (including testosterone and oestrogen), and fat-dissolving bile acids.

Unfortunately, around half the adult population in most developed countries do have too much cholesterol, usually as a consequence of consuming excessive amounts of saturated fat in the form of meat, dairy, and processed foods such as pies, burgers, cakes, and ready meals.

Sleep should be a natural human activity, done without thought and without difficulty. However, many people have problems with their sleep patterns that affect their overall wellbeing and their ability to function effectively during the day. Scientists are beginning to study these problems closely to determine ways to correct them, and this is leading to increased interest in circadian rhythms.

Like many problems, gambling addiction (also known as pathological gambling, compulsive gambling or gambling disorder) may result from a combination of biological, genetic and environmental factors, and can affect people from all walks of life.

What starts as an occasional leisure-time activity, or a way to solve their problems by turning what little money they have into a larger sum… gambling can soon become an unhealthy obsession for some people.