Carbohydrates are chains, consisting of linked molecules of sugar.
Different length chains are known by different names and can be found
in different foods (as shown by the index inside this leaflet). The
body must split the chains to digest the carbohydrates. The speed of
digestion and absorption differs depending on numbers of links, short
chains are digested more quickly.
Carbohydrates and their effect on blood sugar:
- Glucose is absorbed quickly, causing a rapid rise in blood sugar,
the subsequent release of insulin means blood sugar falls quickly too.
- Longer chain carbohydrate, and carbohydrate combined with fibre
are absorbed more steadily helping blood sugar level to be more stable.
A mix of different carbohydrates and fibre is best for sport, providing the body with a steady flow of energy (see diagram).