This document provides guidance on conducting key informant interviews for research on gender and nutrition. It discusses sampling key informants, such as local leaders and program staff, to gain specialized knowledge and influential opinions efficiently. However, interviews may reflect elite biases or miss knowledgeable women. The document also covers ethical issues around anonymity, principles for respectful conversation, and techniques for open-ended questioning to understand perspectives without imposing analyses. The goal is to learn from informants while addressing potential biases around gender, relationships, and individual situations.