Scientists at the Newcastle University found that regular drinking green tea could protect the brain against Alzheimer’s and other forms of dementia.

Similar research has hinted that green tea could also protect against some forms of cancer.

Scientists suggested that green tea extract had been treated under the laboratory conditions that effects normal digestion.

Nearly 30 major compounds called polyphenols had been discovered that found remained active during after being digested.

The extract was then tested over rat nerve cells whether it could protect from toxic effects of certain chemicals and a protein linked to Alzheimer’s disease.

But review of 51 studies found that green tea is not protective against cancer.

Dr Okello added: "There are many factors which have an influence on diseases such as cancer and dementia like a good diet, plenty of exercise and a healthy lifestyle.” 

According to Rebecca Wood, chief executive of the Alzheimer’s charity, the results are found at very early stages, so one cannot make the leap of assuming that green tea can protect people from dementia.

 The results from the study were published in the academic journal Phytomedicine.