A Shanghai mother is suing Shanghai Nestle Co for allegedly using genetically modified ingredients in its chocolate milk powder without declaring them on the label.

Yanling Zhu is back in the Chinese courts after two previously unsuccessful lawsuits brought against the Swiss-based company because she claims to have learnt  Nestlé´s Nesquik milk powder, a product she had been buying regularly for her three-year-old son, contained GM ingredients not indicated on the label.

Zhu said she now has evidence from a German laboratory that shows the powder contains genetically modified ingredients.

"I am angry because Nestlé has not been truthful. This is disrespectful to Chinese consumers. I believe Chinese consumers have the right to know and to choose what they are buying for their families", said Zhu.

Lawyers for Nestle questioned the authenticity of the report in court.