A new study has revealed Vitamin D could help slash the risk of asthma attacks.

Taking the common supplement on top of standard medication led to a 30 percent reduction in the rate of asthma attacks requiring treatment, the review conducted by British scientists and published in The Lacet Respiratory Medicine found.

The risk of dangerous attacks needing emergency hospital attention were halved by taking Vitamin D.

The risk of dangerous asthma attacks requiring hospital treatment was halved by taking Vitamin D.

"The latest research around Vitamin D supplements are encouraging. People are often looking for other ways to manage their condition,” Michele Goldman from Asthma Australia told 9NEWS.

The supplement is thought to boost the immune system's response to respiratory viruses, and dampen down harmful inflammation in the airways.

The study results are largely based on data from adults with mild to moderate asthma. At this stage, the findings don’t apply to children and adults with severe asthma.

About 400 Australians lose their lives to asthma each year, making the latest research encouraging.

But Ms Goldman said it was important that the supplements don’t replace standard asthma medication.

"Not everyone needs supplements, you might just to get out and enjoy the bounty of sunshine that we have,” Ms Goldman said.