A recent study has revealed that a IQ level is directly linked to growth hormones.
The growth hormone in a child's blood is directly linked to the IQ level of the child, according to the University of Bristol researchers. This study also reveals that the children who grow taller also grow smarter, when in comparison to shorter children. If growth hormones are administered to the short children, then their academic performance also improves.
The study which involved 547 children aged eight showed that higher IQs matched the insulin growth factor (IGF) present in their blood. Babies who are born with a normal birth weight have a higher IQ when compared to those who are born with a low weight. Growth hormone therapy was also made use of in the case of 74 children who had low birth weights, which resulted in an improvement in the IQ in addition to physical growth.
The organ development and physical growth during childhood are also influenced by the IGF, which in turn is influenced by the child's diet. Consuming larger quantities of dairy produce and milk during early childhood results in higher levels of IGF. This naturally means that hormone levels can be increased through a proper diet. There are other experts who contend that hormone levels play a relatively small role in determining the IQ.
The research has also revealed that for every per milliliter 100 nanograms rise in IGF-I levels, there is an increase by three points where verbal IQ is concerned. The scientists have not yet discovered how poor physical growth and an impairment where the development of the brain is concerned are linked.