In the 1930s, a notable study conducted by Clara Davis involved a group of orphaned infants who were offered a variety of thirty-four unprocessed and wholesome foods during meals. These offerings ranged from common items like fruits and vegetables to more unconventional choices such as liver and sweetbreads. While the babies showed aversion to certain foods, including liver and ten types of vegetables, some less conventional options were more acceptable.

Interestingly, the study revealed that while many foods were rejected, bone marrow emerged as the most favored item among the infants. This preference highlights how infants can instinctively gravitate toward certain nutrient-rich foods when given a diverse and healthy selection, suggesting innate dietary preferences that could have implications for understanding taste and nutrition.