Menstrual differences due to vegetarian and nonvegetarian diets

Area of Science:

• Nutritional Science
• Reproductive Health
• Human Physiology

Background:

• Dietary patterns significantly influence physiological processes.
• Menstrual cycle regularity is a key indicator of reproductive health.
• Previous research suggests links between diet and hormonal balance.

Purpose of the Study:

• To investigate the association between vegetarian and non-vegetarian diets and menstrual regularity.
• To identify specific dietary components influencing menstrual cycle regularity in premenopausal women.

Main Methods:

• A comparative study involving 41 non-vegetarian and 34 vegetarian premenopausal women.
• Screening for height, weight, body mass index (BMI), and age at menarche.
• Dietary intake analysis focusing on macronutrients, micronutrients, fiber, caffeine, and alcohol.
• Logistic-regression analyses to determine associations between dietary factors and menstrual regularity.

Main Results:

• Higher incidence of menstrual irregularity observed in the vegetarian group (26.5%) compared to the non-vegetarian group (4.9%).
• Vegetarians had higher intakes of polyunsaturated fatty acids, carbohydrates, vitamin B-6, and dietary fiber.
• Non-vegetarians consumed more saturated fatty acids, protein, cholesterol, caffeine, and alcohol.
• Menstrual regularity was positively associated with protein/kJ and cholesterol/kJ intakes.
• Menstrual regularity was negatively associated with dietary fiber/kJ and magnesium/kJ intakes.

Conclusions:

• Dietary nutrients play a role in influencing menstrual regularity.
• Specific nutrients like protein and cholesterol may promote regularity, while fiber and magnesium might disrupt it.
• These dietary effects may be mediated through modulation of circulating sex steroid status.