Living Cyclically: Exploring the Science Behind Hormonal Shifts, Lunar Influence, and Metabolic Changes in Women

Women often notice monthly shifts in energy, mood, and appetite, prompting questions about whether lunar phases also play a role. This paper synthesizes current literature to explore how menstrual cycle–driven hormonal fluctuations—particularly shifts in estrogen and progesterone—affect macronutrient metabolism, cravings, and exercise performance, with a focus on increased appetite and subtle performance variations in the luteal phase. It further examines evidence for potential lunar effects, including studies suggesting modest correlations between moon phases, menstrual onset timing, and sleep disruptions, even though modern lifestyles often obscure such rhythms. For those who do not menstruate—such as postmenopausal women—adopting a monthly or “lunar” framework may still help address cyclical changes in mood or energy. Practical recommendations highlight “cycle syncing” via chrononutrition (aligned meal timing and composition) and targeted exercise based on hormonal states, while also acknowledging debates around any direct lunar impact. Ultimately, emerging findings emphasize the importance of personalized tracking, and future research with rigorous hormonal verification and sleep monitoring is needed to clarify the extent to which lunar considerations enhance health outcomes.