Jaggery is far more complex than sugar, as it is made up of longer chains of sucrose. Hence, it is digested slower than sugar and releases energy slowly and not instantaneously. This provides energy for a longer time and is not harmful for the body.
However, this does not certify it as fit for consumption by diabetics, because ultimately, it is still sugar.
Jaggery also gathers a considerable amount of ferrous salts (iron) during its preparation, as it is prepared in iron vessels. This iron is also good for health, particularly for those who are anemic or lack iron.
Again, jaggery also contains of traces of mineral salts which are very beneficial for the body. You might have experienced this when consuming jaggery, it leaves a hint of salt on the tongue. These salts come from the sugar cane juice where it is absorbed from the soil.
Furthermore, jaggery is very good as a cleansing agent. It cleanses the lungs, stomach, intestines, esophagus and respiratory tracts. Those who face dust in their day to day life are highly recommended to take a daily dose of jaggery. This can keep them safe from asthma, cough, cold, and congestion in chest.