From Ahara Kala to Chrononutrition: An Integrative Review of Food Timing in Ayurveda and Modern Nutritional Science

Abstract

Modern science increasingly shows that when we eat matters just as much as what we eat, a principal long emphasized by Ayurveda as Ahara kala. Aim: This paper aims to critically examine the Ayurvedic concept of proper meal timing and its relationship with contemporary chrononutrition. Method: We conducted a comparative literature review, examining classical Ayurvedic texts on digestion and daily routines alongside modern scientific studies on circadian rhythms and time-restricted eating. Result: While modern chrononutrition focuses on clock-based schedules and circadian biology, Ayurveda emphasizes digestive fire (Agni) and individual signs of competes digestion (Jirna Ahara laksana) rather than strict times. Both frameworks highlight the vital role of temporal eating patterns in health, though traditional concepts lack direct modern medical equivalents. Conclusion: Ultimately, combining modern circadian science with Ayurvedic signs of digestion offers a promising model for personalized nutrition, paving the way for future clinical research to bridge ancient wisdom with modern science.