Attention deficit hyperactivity disorder (ADHD) is a group of behavioural symptoms that include inattentiveness, hyperactivity and impulsiveness. Attention deficit disorder (ADD) is a subtype of ADHD.

Short for biological diversity, is the term used to describe the variety of life and processes found on Earth and includes ecosystem, genetic and cultural diversity, and the connections between these and all species.

Is one of the most common sexually transmitted infections (STIs) in the UK. It’s passed on from one person to another through unprotected sex (sex without a condom). In 2010, 186,753 people tested positive for chlamydia in England. Most of these- more than 150,000- were 24 years old or younger.

Is a lifelong condition that causes a person’s blood sugar level to become too high. There are two main types of diabetes, referred to as type 1 and type 2. Type 2 diabetes occurs when the body doesn’t produce enough insulin to function properly, or the body’s cells don’t react to insulin. This is known as insulin resistance.

Occurs naturally in fruits, vegetables and their juices, as well as honey. It gives these foods their sweet taste. Fructose in crystalline form has been widely used for the past 20 years as a nutritive sweetener in foods and beverages.

Is a hormone produced by beta cells of the pancreas, and is central to regulating carbohydrate and fat metabolism in the body. Insulin causes cells in the liver, skeletal muscles and fat tissue to absorb glucose from the blood.

Also known as D-glucose, dextrose, or grape sugar is a simple monosaccharide (sugar) found in plants. It is one of the three dietary monosaccharides, along with fructose and galactose, that are absorbed directly into the bloodstream during digestion.

A medical condition in which excess body fat has accumulated to the extent that it may have an adverse effect on health, leading to reduced life expectancy and/or increased health problems.