IBADAN, Nigeria (AP) — In her cramped, dimly lit kitchen, Idowu Bello leans over a gas cooker while stirring a pot of eba, the thick starchy West African staple made from cassava root. Kidney problems and chronic exhaustion forced the 56-year-old Nigerian woman to retire from teaching, and she switches between cooking with gas or over a wood fire depending on the fuel she can afford. Financial constraints also limit the food Bello has on hand even though doctors have recommended a nutrient-rich diet both to improve her weakening health and to help her teenage daughter, Fatima, grow.

Along with eba, on the menu today is melon soup with ponmo, an inexpensive condiment made from dried cowhide. “Fish, meat, eggs, fruits, vegetables and even milk are costly these days,” Bello, 56, said, her lean face etched with worry. If public health advocates and the Nigerian government have their way, malnourished households in the West African nation soon will have a simple ingredient available to improve their intake of key vitamins and minerals .

Government regulators on Tuesday are launching a code of standards for adding iron, zinc, folic acid and vitamin B12 to bouillon cubes at minimum levels recommended by experts. While the standards will be voluntary for manufacturers for now, their adoption could help accelerate progress against diets deficient in essential micronutrients , or what is known in nutrition and public health circles as “hidden hunger.” Fortified bouillon cubes.