London: Parents, please note -- make sure that your child is exposed to adequate sunlight and consume a diet rich in vitamin B, for a new study says that these will reduce their risk of suffering from depression in later life.

Researchers at the University of Bristol have carried out the study and found that children with low levels of vitamin D are more likely to suffer from mental health problems such as depression in their teenage years.

However, the study says those who get adequate vitamin D have 10 per cent lower risk of developing depression, a daily reported.

For their study, the researchers looked at vitamin D levels in more than 2,700 children when they were aged nine and 13. Those with the lowest levels of vitamin D were more likely to show signs of depression.

Children with higher levels were also more likely to show a decline in depressive symptoms in their teenage years.

The study investigated levels of two forms of the vitamin -- D2 and D3 -- and found the strongest anti-depression link with D3, say the researchers.

However, lead researcher Dr Anna-Maija Tolppanen said further research is needed before a change in medical practice could be recommended.

Vitamin D is mainly made by the action of sunlight on the skin. It's also abundant in oily fish like tuna.