How Do Minerals Affect the Menstrual Cycle?

The menstrual cycle is a complex physiological process regulated by endocrine signaling, metabolic status, and reproductive tissue function. The menstrual cycle typically consists of four phases: the menstrual phase, follicular phase, ovulation, and luteal phase. These stages involve tightly regulated hormonal signaling and cellular changes in ovarian follicles and the uterine endometrium.

While hormones are the central drivers of menstrual physiology, micronutrients—particularly minerals—play essential regulatory roles in these processes.

One nutrient receiving growing attention in discussions of menstrual health is magnesium. This has prompted questions such as can magnesium delay your period, and how mineral levels influence the hormonal pathways that regulate menstruation.

Scientists from Johannes Kepler University Linz have examined how minerals influence female fertility and the menstrual cycle. Published in Nutrients, the review looks at several minerals and how they impact hormonal regulation, ovarian function and ovulation, endometrial health, and oxidative stress.

Minerals and the menstrual cycle

Minerals contribute to multiple stages of the menstrual cycle (Table 1). Their biological roles include:

• Acting as cofactors for enzymes involved in hormone synthesis
• Supporting antioxidant systems that protect reproductive tissues
• Regulating cell signaling pathways in ovarian follicles
• Influencing endometrial cell proliferation and uterine function

Disruptions in mineral balance can therefore affect ovulation, menstrual timing, and fertility outcomes.

Table 1: Several minerals influence menstrual physiology through roles in hormone signaling, antioxidant defense, and ovarian function.

Can magnesium delay your period?

Magnesium is a cofactor in over 600 enzymatic reactions and plays an important role in magnesium and menstrual cycle regulation through its effects on metabolic and endocrine pathways. The mineral supports healthy ovulation and endometrial function throughout the menstrual cycle by mitigating oxidative stress.

Because the uterus contains smooth muscle, magnesium's physiological effects on muscle relaxation have led to speculation that magnesium supplementation might influence menstrual timing or flow.

Current evidence suggests that magnesium does not directly delay your period. Instead, magnesium supports metabolic regulation, antioxidant defenses, and hormone signaling pathways that influence ovulation and menstrual cycle stability. “Both a deficiency and an excess of magnesium can disrupt metabolic balance and negatively affect reproductive health,” said lead author Celine Kapper. Hypomagnesemia can increase oxidative stress and impair reproductive function.

Magnesium's involvement in estrogenic metabolic pathways and glucose regulation also underscores its significance in managing menstrual irregularities, particularly in conditions like PCOS.

“Magnesium is vital for insulin metabolism, essential in PCOS management where insulin resistance is a significant concern,” added Kapper.

Zinc and hormonal regulation

Zinc plays a direct role in influencing sex hormone balance through testosterone synthesis and insulin metabolism. The mineral also affects follicle maturation, libido, and estrogen receptor function.

Zinc deficiency can lead to menstrual irregularities, reduced fertility, and may contribute to conditions like PCOS and endometriosis.

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Kapper and corresponding author Dr. Marlene Rezk-Füreder told Technology Networks, “Zinc supplementation has been found to enhance insulin sensitivity, which can help alleviate some PCOS symptoms. Therefore, maintaining balanced levels of these minerals could be crucial for improving reproductive health and fertility in women with PCOS.”

Zinc also regulates endometrial cell proliferation, potentially influencing conditions like endometrial cysts.

Iron and menstrual health

Iron is crucial for the menstrual cycle, with deficiencies leading to hormonal imbalances and anemia, affecting ovulation regularity and blood flow to the ovaries.

Both deficiency and excess iron can impact fertility. Studies have linked low ferritin levels to unexplained infertility, due to disturbances in the menstrual cycle, and elevated ferritin levels to endometriosis, a chronic condition characterized by the presence of endometrial-like tissue outside the uterus.

Iodine and thyroid–reproductive axis interactions

Iodine plays an important role in thyroid function and hormone balance, both of which can lead to disruptions in the menstrual cycle if homeostasis is disturbed.

Iodine deficiency is linked to hypothyroidism. Thyroid hormone imbalances can influence:

• Ovulation
• Menstrual cycle length
• Sex hormone-binding globulin (SHBG) levels

Excessive iodine intake can be toxic and adversely affect pregnancy outcomes, highlighting the need for careful iodine management throughout the reproductive cycle.

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Selenium, copper, and manganese in antioxidant defense

Several trace minerals contribute to reproductive health primarily through antioxidant protection.

Selenium

Selenium protects reproductive tissues from oxidative damage, promoting stable ovulation and preserving ovarian function. Optimal selenium levels are linked to enhanced fertility outcomes by mitigating oxidative stress and supporting the hormonal equilibrium required for ovulation.

Imbalances in selenium levels can disrupt menstrual and ovulatory patterns, highlighting its importance throughout the menstrual cycle, from the follicular phase to menstruation.

Copper

Copper is a cofactor for superoxide dismutase (Cu,Zn-SOD), which helps protect oocytes from oxidative stress. It also supports endothelial function, essential for optimal blood flow to the uterus and ovaries.

Excessive copper levels can lead to oxidative stress, and balancing its intake is crucial for leveraging its antioxidative benefits while mitigating potential adverse effects.

Manganese

Manganese is also a vital antioxidant in female reproductive health, primarily by acting as a cofactor for manganese superoxide dismutase (Mn-SOD). This enzyme safeguards cellular structures against oxidative stress, which can have detrimental effects on oocyte quality, hormonal balance, and the reproductive cycle.

Similarly to copper, excessive manganese levels can lead to pro-oxidative states, potentially resulting in the degradation of oocyte quality and disturbances in ovarian function.

Calcium and ovulatory signaling

Calcium's influence on the menstrual cycle extends from hormonal regulation to reproductive tissue function. It contributes to the secretion of gonadotropin-releasing hormone (GnRH), a pivotal hormone controlling ovulation and the menstrual cycle, as well as other intracellular signaling pathways crucial for follicular development, oocyte maturation, and the release of the oocyte during ovulation.

Imbalances in calcium levels can compromise fertility and pregnancy success. During pregnancy, calcium is vital for endometrial tissue health, embryo implantation, and gene expression crucial for successful pregnancy initiation.

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Guiding dietary recommendations

“The research landscape for minerals in female fertility is less developed compared to male fertility, with numerous studies focusing on men. During our research, we found no comprehensive reviews specifically addressing the impact of minerals on female fertility,” said Rezk-Füreder.

“Our research provides a comprehensive overview of how maintaining optimal levels of various minerals can significantly influence women's reproductive health and fertility,” added Rezk-Füreder. “It offers evidence-based guidelines for improving dietary and clinical interventions aimed at enhancing female reproductive well-being.”

This content includes text that has been created with the assistance of generative AI and has undergone editorial review before publishing. Technology Networks' AI policy can be found here.

Celine Kapper and Dr. Marlene Rezk-Füreder were speaking to Rhianna-lily Smith, Editorial Assistant for Technology Networks.

About the interviewees:

Celine Kapper is a laboratory assistant in the Department of Gynecology, Obstetrics, and Gynecological Endocrinology at Johannes Kepler University Linz.

Dr. Marlene Rezk-Füreder is the co-founder of Diamens, a biotechnology research company that targets healthcare innovations and solutions for Endometriosis. Rezk-Füreder completed her PhD in the Department of Gynecology, Obstetrics, and Gynecological Endocrinology at Johannes Kepler University Linz.