Global food giant Nestle is conducting tests on one of its new baby formula products after receiving complaints from parents that it was making their children sick with diarrhea and vomit, local media reported on Thursday.

Parents posted their complaints and concerns on the review website about Nestle's NAN H.A. 1 Gold baby formula, which is made in Germany, saying their babies were suffering vomiting, wind, green runny poo after being on the new formula.

Nestle has not found any "safety issues" during its first round of testing on the formula but says further results are expected in the coming week, according to the Australian Associated Press (AAP) reports.

Nestle says it has implemented strict quality controls throughout the production process.

"We have strict quality control procedures in place throughout the manufacturing process to ensure our products meet the highest standards of quality and safety," the company said in a statement on Thursday.

A Nestle spokeswoman told AAP that there was nothing in the formula that should cause a problem.

"Babies starting on the formula from scratch seem to be fine. Babies swapped from one formula to another - that's the problem," the spokeswoman said.