Background: The menstrual cycle, consisting of periods, follicular, ovulatory, and luteal phases, is influenced by hormonal changes that affect a woman's overall health, including her eating habits, physical condition, and breathing patterns. Aim: We aimed to compare the diet, menstrual distress, and breathing during the different phases of menstruation in young, healthy females. Materials & methods: The Department of Physiology at Index Medical College & Research Center in Indore, Madhya Pradesh conducted an observational clinical study on 100 subjects aged 18-25 years. The study included detailed medical, family, and drug history, dietary intake, and cardiac autonomic tests. The participants were selected using simple random sampling and had to be between the ages of 18 and 25 years old. Exclusion criteria included not being between the ages of 18 and 25, pregnant or breastfeeding, living outside the study area, having a history of systemic hypertension, dyslipidemia, coronary heart disease, or autonomic disease, having polyneuropathy, unwilling to give written informed consent, smoking, alcoholism, medical illness, or being on oral contraceptive pills or hormonal replacement therapy. Results: The study analyzed three menstrual phases and their relationship with meal patterns. No significant differences were found in dietary habits. The menstrual distress questionnaire showed a positive correlation with related outcomes. The secretory phase had a significantly higher mean resting heart rate than the proliferative phase, indicating sympathetic dominance. The 30:15 ratios between the proliferative and secretory phases were greater during the secretory phase, indicating superior parasympathetic regulation. The slow deep breathing technique showed a statistically significant difference between the proliferative and secretory phases, with the secretory phase having a higher value. Conclusion: Our study concludes that diet, menstrual pain, and breathing habits significantly change between menstrual phases in healthy girls. Hormone levels and dietary changes can impact respiratory efficiency and symptoms. Individualized plans are crucial for improving health.