The document discusses opportunities and challenges for achieving nutrition security in low and middle income countries. It finds that while stunting in children under 5 has decreased from 44% to 29% between 1990 and 2010, 171 million children are still stunted. Overweight in children is also increasing steadily. There has been slow progress in reducing micronutrient deficiencies and low birth weight. Undernutrition and overnutrition can coexist in the same country, individual, and even household. Improving nutrition is important as malnutrition impacts cognitive development, economic productivity, and overall societal and economic costs. To accelerate progress in nutrition, countries need to focus on prevention during the first 1000 days of life from conception to 24 months, invest in nutrition-specific and nutrition