Cycle Syncing and Premenstrual Syndrome

For years, millions of women have viewed premenstrual syndrome (PMS) as an inevitable biological tax they must simply pay every month. Yet, for some reason, while one half of reproductive-age women worldwide feels PMS, the other half experiences fewer symptoms or none at all. Why is this? Our latest article has all the answers.

PMS is not just a matter of “heavy periods”; it is a major challenge for the neuroendocrine system that impacts productivity, emotional well-being, and overall quality of life. However, if you become friends with your own biology and live in resonance with the infradian rhythm (more on this below), you can almost entirely or completely eliminate the negative effects of this condition. A first-of-its-kind study recently validated the effectiveness of the Cycle Syncing® method. This is a science-backed health management strategy based on aligning lifestyle, nutrition, and fitness with the four phases of the menstrual cycle.

Premenstrual Syndrome: Symptoms and Prevalence

Research shows that PMS affects 47.8% of women globally. Up to 80% experience psychological and physical symptoms. Prevalence rates vary significantly by region: the lowest rates are reported in the Netherlands (10%) and France (12%), while the highest is found in Iran (98%). Overall, data indicates that the highest frequency of the condition is observed in Asia, while Europe shows the lowest.

Symptoms of PMS

The most common signs include:

Symptoms typically begin about two weeks before the onset of menstruation. Approximately 23–31% of women experience PMS symptoms severe enough to disrupt their daily lives. Furthermore, the presence of PMS is considered a significant risk factor for postpartum depression.

The most severe form of PMS—Premenstrual Dysphoric Disorder (PMDD), which affects an estimated 3–8% of women—is officially classified as a distinct pathology by leading global health organizations:

• World Health Organization (WHO): Under the ICD-11 classification, PMDD is defined as a gynecological diagnosis.
• American Psychiatric Association (APA): In the DSM-5 manual, PMDD is categorized as a psychiatric disorder.

Modern scientific analysis has revealed one of the reasons why some women experience PMS symptoms much more acutely. The key lies in a progesterone metabolite called allopregnanolone.

The Root Causes and Risk Factors of PMS

Contrary to common stereotypes, hormone levels in women with PMS are often completely normal. The real issue lies in the brain’s neurochemical sensitivity to hormonal fluctuations. A key player here is the neurosteroid allopregnanolone, a metabolite of progesterone. Under normal conditions, allopregnanolone acts as a potent natural tranquilizer, interacting with the brain’s GABA receptors (neurotextmitters that regulate excitation in the nervous system) to induce a calming effect.

During the luteal phase, progesterone and allopregnanolone levels drop sharply right before menstruation. In women prone to PMS, problems arise when the brain fails to adjust the configuration of its GABA receptors quickly enough to match this decline. Due to alterations in GABA receptor architecture—specifically, increased expression of the α4 and δ subunits—their spatial shape (conformation) changes. As a result, they become insensitive to the usual neuronal inhibition that normally keeps us calm. This creates a molecular paradox: instead of the expected calming, a woman experiences anxiety and irritability. The problem is not “bad hormones,” but rather the adaptation speed of the receptor apparatus.

Risk Factors: What Amplifies the Neurochemical Disruption

Why does one woman navigate the luteal phase symptom-free while another struggles with PMS? A study published in Frontiers in Psychiatry (2024) identifies several non-physiological triggers that exhaust the adaptive capacity of the nervous system and GABA receptors:

• Chronic Stress: Persistently high cortisol levels block the brain’s ability to adapt to falling progesterone.
• Bad Habits: Smoking, excessive caffeine intake, and alcohol consumption alter neuronal sensitivity to neurosteroids.
• Sociodemographic Stressors: Being unmarried, low economic income, and lack of regular physical activity statistically correlate with more severe PMS.
• Nutritional Deficiencies: A lack of critical micronutrients (magnesium, zinc, vitamin B6) disrupts the synthesis of inhibitory neurotransmitters.

When neurochemical chaos is amplified by stress, traditional medicine offers pharmaceuticals, but the latest clinical trials prove that lifestyle biocorrection works just as effectively.

Biological Correction Can Alleviate Premenstrual Syndrome

The results of a first-of-its-kind clinical study conducted by FLO Living in collaboration with industry leaders in technological solutions for women prove that suffering during the cycle is not a physiological norm. The virtual clinical trial, approved by the Institutional Review Board (IRB), lasted 3 months. It involved 60 women aged 22 to 42 with pronounced symptoms of PMS, PMDD, and perimenopausal cycle changes.

Participants used the MyFLO® app daily, which provided phase-specific recommendations on nutrition, workouts, and stress management. The study design included continuous glucose monitoring (CGM) via technology and hormone tracking.

As early as 60 days into the program, 91.89% of participants recorded a significant reduction in the number and intensity of PMS symptoms. Overall, in 90 days, the total number of complaints decreased by 85.7%.

Key achievements of the 90-day syncing program:

• 94.44% of participants recorded stabilization of blood sugar levels.
• Nearly 90% noted a significant improvement in mood and vitality.
• 80.56% of women reported a significant reduction in pain during menstruation.
• In 50% of participants, the cycle became more predictable.

In addition to daily metabolism, this method regulates deeper processes—our second biological clock, which directly manages stress.

Infradian Rhythm and the Cycle Syncing Method

Everyone knows about the circadian rhythm—this is our internal 24-hour clock (the “day/night” cycle). It determines when we feel like sleeping, when to wake up, and when to release cortisol to start our day. This clock ticks the same way for both men and women.

But reproductive-age women also have a second, larger clock—the infradian rhythm. The word “infradian” literally means “longer than a day.” This is an approximately 28-day cycle. In simple terms, the circadian rhythm is a small clock hand that completes a circle in a day, while the infradian rhythm is a large hand that completes one circle in a month. They work simultaneously.

Most modern fitness protocols and nutritional recommendations have historically been based on research in male cohorts, which only considered a linear 24-hour hormonal track. However, statistics from Pew Research and Healthy Women show that such a unified approach does not account for female physiology: over 47% of women encounter hormonal imbalances, and 40% experience chronic exhaustion due to attempts to maintain the same intensity every day. The cycle syncing method helps align the daily schedule with the fluctuations of the infradian rhythm and one’s own well-being. This alone can be entirely sufficient to reclaim the days lost to “heavy periods.”

Forget About Premenstrual Syndrome

For practical application, Alisa Vitti in the guide suggests breaking down the monthly cycle into four biological phases according to the POWR system:

Syncing circadian and infradian biorhythms helps lower the chronic burden on the nervous system, but when disruption has already occurred at the receptor level, evidence-based medicine explores additional therapeutic tools.

SSRIs and Premenstrual Syndrome

If the cycle syncing method helps adjust metabolism on the long track, then in cases of severe premenstrual dysphoric disorder (PMDD), medicine utilizes pharmacology. An interesting phenomenon is the use of selective serotonin reuptake inhibitors (SSRIs). Unlike treating classic depression, where the therapeutic effect requires weeks, relief from PMS occurs within a few days or even hours.

This is explained by a unique neurobiological mechanism: medications in this group instantly stimulate the 3α-HSD enzyme, which is responsible for converting hormonal metabolites into allopregnanolone. Thus, SSRIs act not only through serotonin accumulation but as fast modulators of neurosteroids. This allows using minimal doses of medication exclusively during the luteal phase, which minimizes the risk of side effects.

Nevertheless, pharmacology remains a backup, while the first line of defense, according to international protocols, must be nutritional support. Remember that any medications and supplements should not be self-prescribed. A medical specialist will help order the necessary tests and select a treatment that is safe and effective specifically for you.

Power of Nature: Supplements with Proven Effectiveness

A large clinical review published in Frontiers in Psychiatry (2024) highlights several non-pharmacological strategies that have a direct evidence base in managing PMS symptoms:

• Vitex Extract (Chasteberry): Directly affects dopamine receptors, gently lowers prolactin levels, and effectively eliminates cyclic mastalgia (breast swelling and pain).
• Saffron: Clinical studies (in doses of 15–30 mg) have proven that thanks to the active components crocin and safranal, it is as effective as Prozac in correcting low mood states during the cycle, while offering a significantly higher safety profile.
• Magnesium, Zinc, and Vitamin B6: Act as critical, indispensable cofactors in neurotransmitter metabolism and support the inhibitory GABAergic system.
• Mindful Movement: Gentle yoga practice demonstrates better results in managing psychological symptoms than high-intensity aerobic exercise. Through breathing practices, it activates the vagus nerve, lowers cortisol levels, and promotes deep neuroregulation.

But what if neither syncing nor supplements bring relief? Perhaps the issue is not PMS at all.

When Premenstrual Syndrome Signals Other Diseases

True premenstrual syndrome has a strict criterion: symptoms disappear completely with the onset of menstruation. If discomfort, pain, or a low mood state remain with you throughout the entire month, worsening in the luteal phase, PMS is masking other, more serious disorders.

Clinical practice proves that the following pathologies are most frequently masked under PMS symptoms:

• Endometriosis: If your “PMS” is accompanied by unbearable pelvic pain that radiates to the lower back or legs, and this pain starts long before bleeding—this is a reason to immediately rule out endometriosis, which requires specific therapy, not just a diet.
• Uterine Fibroids: Can cause severe bloating, a feeling of pressure, and pain, which women often mistake for regular premenstrual swelling.
• Polyendocrine Metabolic Ovarian Syndrome (PMOS): Due to chronic anovulation and lack of progesterone, it causes deep psychoemotional changes, acne, and fluid retention, which can easily be confused with severe PMS.
• Perimenopause: The initial stages of declining ovarian function in women after 40 often mimic a sudden “PMS flare-up” due to erratic estrogen spikes.
• Subclinical Hypothyroidism: Sluggishness, low mood states, puffiness, and rapid exhaustion are classic signs of thyroid hormone deficiency, which women have been unsuccessfully trying to treat with cycle trackers for years.

Hormonal health is the result of a conscious choice and alignment with your own biology. The latest clinical data confirms: the female body is programmed to feel good throughout the entire month, not just two weeks out of four. Understanding your infradian rhythm turns what once seemed like a burden into a major biological advantage.

Care from “Lior”

If premenstrual syndrome masks more serious health disorders, do not try to simply endure it or self-treat.

The specialists at the “Lior” Medical Center follow international protocols of evidence-based medicine exclusively. We will help you run a precise audit of your reproductive system, identify the true causes of discomfort, decode your body’s signals, and set your internal clock to maximum health mode.

📞 Consultation and booking: +380 73 200 6198 (or message us on Telegram).