The Modified Relative Dose Response (MRDR) test is being conducted as part of the ongoing national nutritional survey organized by the Federal Government of Nigeria in conjunction with IITA and other partners. The MRDR test assesses the vitamin A status of people. Participants from Nigeria’s six geopolitical zones were trained to carry out the test on the field during a one-week training workshop facilitated by Principal Investigator Mercy Lung’aho at Rockview Classic Hotel, Abuja, on 2–8 August. Lead Investigator Busie Maziya-Dixon of IITA jointly coordinated the training with Lung’aho and co-Principal Investigator Prof. Rasaki Sanusi.