Our hope is that if we feed blueberry juice to a child with this type of tumour, we can intervene and shrink the tumour before it becomes a big problem.

Those who drank blueberry juice showed a "significant improvement on learning and memory tests", scientists said.

Then, by the orthogonal test, the optimum formula containing ginseng flower, blueberry juice and xylitol is determined to develop a health drink with good taste and rich nutrients.