Diabetes DPG Public Library

Chrono-nutrition is an emerging field that investigates the interaction between meal timing, circadian rhythms, and metabolic regulation. This framework is biologically coherent and physiologically grounded for integrating temporal eating patterns into nutritional management for GDM. Current dietary recommendations emphasize nutrient composition and caloric intake, often without fully considering the temporal aspects of food intake. Emerging human evidence suggests that meal timing and daily carbohydrate distribution may influence maternal glycemic dynamics, particularly postprandial excursions and glycemic variability—beyond total caloric intake and macronutrient composition alone.

A conceptual framework summarizing practical chrono-nutrition considerations in GDM include: 1) early initiation of daily food intake; 2) daytime distribution of carbohydrate intake; 3) limitation of late-evening carbohydrate-dense meals; 4) regularity of meal timing; 5) individualized evening snack when needed.

These principles are hypothesis-driven and based on current mechanistic knowledge and emerging human evidence. They are intended to translate the conceptual framework into practical applications by providing non-prescriptive, flexible considerations that complement medical nutrition therapy.

Interventional evidence is limited, so chrono-nutrition should be regarded as an adjunctive, low-risk, and hypothesis-driven refinement of standard medical nutrition therapy rather than a guideline-level intervention.

Chrono-nutrition represents a promising but still evolving theory aimed at aligning maternal metabolism with circadian physiology in pregnancies complicated by GDM. Future research can prioritize randomized controlled trials integrating continuous glucose monitoring, standardized

definitions of meal timing constructs, and comprehensive assessment of maternal and neonatal outcomes. Longitudinal follow-up studies are needed to determine whether temporally aligned nutritional strategies during pregnancy translate into sustained metabolic benefits for mothers and offspring.