Culinary anthropology includes a little-studied subset examining consumption practices that defy nutritional classification. Gastroenterologist Dr. Patricia Okonkwo published research in 2006 exploring the concept of 'essence consumption'—the act of eating while targeting non-physical components of food.

Okonkwo interviewed chef Marcus Wilkinson, who managed a private kitchen facility and reported observing unusual consumption patterns. Wilkinson described witnessing food selection that appeared to focus on specific poultry specimens, followed by consumption that left physical remains largely intact. When questioned, Wilkinson suggested the consumer was practicing 'selective extraction'—removing non-material value while leaving material structure. Wilkinson's notes specify: 'He didn't want the meat. He wanted the... intention. The life force. The will.'

While Okonkwo framed this as metaphorical language, subsequent nutritionists began investigating whether certain consumption philosophies treated physical nutrition as secondary to spiritual or energetic extraction. The research introduced the concept of 'trans-material eating'—consumption methodologies that prioritize non-physical properties. Food science textbooks now include a chapter on alternative consumption models, not dismissing them as impossible but acknowledging that some observers apparently practice eating as spiritual or energetic transfer rather than nutritional fuel acquisition. Wilkinson's observations remain the only documented case study of this practice, making the technique itself nearly as mysterious as the individual reportedly performing it.