The effects of fast food on menstrual cycle can be negative. Junk food high in sugar, unhealthy fats, and refined carbohydrates can disrupt hormonal balance, potentially leading to irregular periods, heavier flows, or more severe premenstrual symptoms. High sugar intake can spike insulin levels, affecting reproductive hormones. Trans fats may promote inflammation, impacting hormonal regulation. Excessive salt can lead to water retention and bloating. Poor diet can also influence body weight, which can affect menstrual regularity. A balanced diet rich in nutrients supports overall health, including menstrual wellness. Prioritizing whole foods over fast food can positively impact the menstrual cycle.