08/03/2026
Have you ever wondered if you caused your child’s picky eating?
It’s one of the most common questions I hear from parents, and it’s often accompanied by guilt.
A recent twin study followed more than 4,800 children from 16 months to 13 years to better understand why some children become picky eaters. By comparing identical and fraternal twins, researchers were able to estimate the influence of genetics and the environment on picky eating.
The research found that by age 3, genetics explained about 83% of the differences in picky eating between children.
That doesn’t mean your child’s picky eating is “83% genetic.”
It means that when researchers compared thousands of children, biology explained much of why some children were pickier than others—even when they grew up in the same family.
So, does this mean there’s nothing we can do to support our cautious eater?
No way!
The study ALSO found that the environment plays a HUGE role, especially during the toddler years. Every positive, low-pressure experience with food helps shape a child’s relationship with eating.
So while genetics may influence your child’s starting point, it’s your support that influences their journey along the way.
A simple mindset shift from “What did I do wrong?” Oto How can I best support the child that’s in front of me?” Can make all the difference!
Nas, Z., Herle, M., Kininmonth, A. R., Smith, A. D., Bryant‐Waugh, R., Fildes, A., & Llewellyn, C. H. (2025). Nature and nurture in fussy eating from toddlerhood to early adolescence: findings from the Gemini twin cohort. Journal of Child Psychology and Psychiatry, 66(2), 241-252.