Nearly 40% of conventional baby food products analyzed in a new US study were found to contain toxic pesticides, while none of the organic products sampled in the survey contained the chemicals. The research, conducted by the Environmental Working Group (EWG) non-profit, looked at 73 products and found at least one pesticide in 22 of them. Many products showed more than one pesticide, and the substances present a dangerous health threat. "Babies and young children are particularly vulnerable to the health risks posed by pesticides in food," said Sydney Evans, a senior science analyst at EWG. The study looked at products from Beech-Nut, Gerber and Parent's Choice, though it did not specifically identify which of the companies' products contained pesticide residue. Among pesticides it detected were acetamiprid, a neonicotinoid insecticide that harms bees and humans, and captan, which is linked to cancer. Fludioxonil, a product commonly used on fruits, vegetables and cereals, was found in five products and is thought to harm fetal development, cause changes in immune system cells and disrupt hormones. Apple-based products were the most likely to contain high levels of pesticide residue, and blueberries, pears and strawberries are also among produce that commonly hold high levels of the chemicals. The best way to avoid pesticides is to buy organic baby food products, which are subjected to much stricter regulations.