This is the protocol for a review and there is no abstract. The objectives are as follows:
To assess the effectiveness of programmes that provide energy, nutrients, or micronutrients, or both through food or drink to improve the physical and psychosocial health of disadvantaged children aged three months to five years.
To assess the potential of such programmes to reduce socioeconomic inequalities in undernutrition and its consequences.
To evaluate process of implementation and to understand how this may impact on outcomes.