People who are sensitive to sugar almost always have low levels of the neurotransmitters seretonin and beta endorphins. Serotonin helps to regulate mood, impulse control and appetite and so low levels can lead to compulsive tendencies, depression and irritability and creates a biochemical disposition towards sugar addiction.
The consumption of sugar evokes beta-endorphins, which are natural painkillers and that can create a sense of euphoria. They also determine pain tolerance, self esteem and confidence in individuals. So the sugar sensitive person gets an actual high when they ave something sweet and will often find it impossible to stop at one biscuit; they have to have the whole packet.
A lack of sugar causes the body to go into withdrawal and they will become tired, lethagetic, irrtable and depressed and experience an overwhelming physical craing for somthing sweet. Relief only comes when they fulfil that need.(written by Amanda Grigg and Michelle Laud)