All living creatures are heavily influenced by their environment. Although modern society brings artificial light and temperature control, our biology is always being affected by both natural and synthetic environmental stressors. Traditional cultures acknowledge the moon’s influence on the menstrual cycle, as they share a similar cycle: between 27 and 30 days. A long-term study published in Science Advances in January 2021 demonstrated that women younger than 35 more often sync their menses with the new or full moon more often than women over the age of 35. Research has also demonstrated the decreased tolerance of cold exposure on a women’s body during the different phases of the cycle, which aligns closely with how Traditional Chinese Medicine (TCM) has an emphasis on avoiding cold exposure including cold or raw foods and external cold exposure during menstruation.