Oat and soy milk may pose danger to children Experts warn that oat and soy drinks may expose young children to excess sugar, poor nutrition, and related health risks. 30 April 2026 Parents have been warned against giving young children vegan oat and soy milks over growing health concerns. A glass of milk The British Society for Allergy+Clinical Immunology say drinks marketed as healthy alternatives to cow's milk can be high in sugar while lacking essential nutrients. New guidance highlights risks for under-fives, including tooth decay, malnutrition and obesity.