Vitamin pills could be free to all pregnant and breast-feeding women and young children across Wales, if a pilot scheme proves successful.
Currently, low-income families across the UK get free vitamins and vouchers for milk, fruit and vegetables. Under the pilot scheme in Cardiff, vitamins will be free at health centres and given out by health visitors.
First Minister Carwyn Jones said the aim was to "give children the best start in life." The scheme, which will cost £53,000 for the year, will be launched at the Ely and Caerau Centre, in Cardiff.
Attending the launch, Health minister Edwina Hart is expected to say: "These vitamins are needed for normal healthy growth and development."