010: Heart flutters, skips, and pings in your 40s and 50s — the hormonal reason behind them and what actually helps

Your heart did something it had never done before. Maybe it was a flutter, a racing, a skipping — or a sudden pounding that made you stop and pay attention. Or maybe it was subtler than that — a ping, a brief uncomfortable sensation in your chest, a single beat that just felt different. Maybe it passed in a second. Maybe it lasted long enough that you went to the doctor, or the emergency room, where everything was checked and came back clear.

And yet it happened again.

If this is your experience — you were right to take it seriously. Any new heart symptom deserves proper medical evaluation. If your tests came back clear, that is good news. And it may also open a different conversation — one about what the hormonal shifts of this season may be contributing to what you are experiencing.

By the end of this episode, you'll understand what the research shows about the connection between hormonal changes and heart palpitations in women in their 40s, 50s, and 60s — and one concrete thing you can do about it today.

What the research shows

The heart has estrogen receptors. These receptors sit on heart muscle cells — and when estrogen levels change, those cells respond. Research shows that shifts in hormone levels can change how the heart's electrical system fires. When that system misfires, even slightly, you feel it as a flutter, a skip, or a racing heartbeat.

Research by Carpenter and colleagues at Indiana University found that heart palpitations are reported by up to 42% of women in the years leading up to menopause — and up to 54% of women after menopause. The connection between hormonal change and palpitations is well documented.

Some research suggests that shifting estrogen may cause the heart to beat faster than usual — with one study noting increases of up to 16 beats per minute. It is worth saying that this comes from a single line of research and individual responses vary. The broader picture is consistent though: estrogen affects how the heart beats, and when estrogen fluctuates, the heart can feel it.

Progesterone plays a role too. Both estrogen and progesterone influence how the heart maintains a steady rhythm. When both hormones are shifting at the same time — as they do during these years — the heart's electrical system has less hormonal support than it used to. 

The nervous system piece

In Episode 008 we covered the vagus nerve — the nerve that governs your body's ability to move between alert and calm. That same system plays a direct role in heart rhythm. Estrogen supports the balance between your body's alert mode and its calm, recovery mode. As estrogen shifts during these years, your body may spend more time in alert mode than it used to. For some women, this contributes to palpitation events — especially during stress or in the early hours of the morning when sleep is lighter.

The magnesium piece

Magnesium plays a direct role in how the heart beats. It helps regulate the electrical signals that keep the heart in a steady rhythm. It also supports the calm, recovery mode of the nervous system — the same system we covered in Episode 008.

A study published in a nutrition journal found that when postmenopausal women followed a diet low in magnesium, heart rhythm changes appeared — including irregular beats that resolved when magnesium was restored. A review of the research confirmed that low magnesium levels are linked to a higher risk of irregular heart rhythms.

Magnesium is also one of the minerals most affected by elevated stress hormones. During these years, stress hormone patterns can shift — running higher than they used to. This increases the demand for magnesium at exactly the time when most women's intake is not keeping pace with that demand.

The caffeine piece

Caffeine is a stimulant that directly affects the heart's electrical system. It increases heart rate and can contribute to palpitation events — particularly during a season when the heart is already working in a less stable hormonal environment. Caffeine that never caused any noticeable effect a decade ago may now feel different. This is a reflection of how the hormonal shifts of this season change the body's sensitivity to stimulants.

Caffeine also has a half-life of approximately five to seven hours in most people. That means a coffee at noon still has half of its stimulating effect in your system at 6 or 7pm. For women experiencing palpitations — particularly the early morning racing heart or ping that some women notice when sleep is lighter — caffeine consumed in the afternoon may still be circulating during the hours when the heart and nervous system are most sensitive.

A simple adjustment worth trying: move all caffeine to before 10am and keep it there consistently for two weeks. And always have protein before or alongside your coffee — eating protein first slows how quickly caffeine enters your bloodstream, which smooths out the spike in heart rate that caffeine on an empty stomach can produce. Pay attention to whether the frequency or intensity of palpitations changes. This costs nothing and requires no supplementation. And for some women it makes a noticeable difference on its own.

Your takeaway from today

If you are experiencing heart palpitations that are new, frequent, or concerning — see your doctor first. Rule out any underlying cardiac cause. That is always the right place to start.

If your tests come back clear and the palpitations continue, magnesium glycinate is worth looking at seriously. Most women in their 40s, 50s, and 60s are low in magnesium — and low magnesium is directly linked to heart rhythm irregularities. Magnesium glycinate is the form most widely recommended by functional medicine practitioners. It absorbs well, is gentle on digestion, and directly supports both heart rhythm and the nervous system's calm, recovery mode. If you are on heart medication or have a diagnosed heart condition, check with your healthcare provider before adding any supplement.

Magnesium is one piece of a larger nutritional picture. And that larger picture is what makes the difference during this season.

The full nutritional foundation that supports your heart, your hormones, and your nervous system during these years is what I teach inside Nourish.

Nourish is my 21-day ancestral nutrition immersion — designed for the woman who is ready to give her body what it actually needs to thrive during this season of life. It includes daily education, recipes, shopping lists, a suggested menu plan, and a bonus masterclass called Nourishing Your Hormones, for women in their 40s, 50s, and 60s navigating perimenopause and the decades that follow. You'll find it at nourishwithkatrina.com/nourish.

To your vibrant health and freedom,
Katrina

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Research references for this episode:

Carpenter, J.S., et al. (2021). A MsFLASH Investigation of Self-Reported Menopausal Palpitation Distress. Indiana University School of Nursing. Reported that heart palpitations affect up to 42% of perimenopausal women and 54% of postmenopausal women.

Shufelt, C.L. (2022). Heart Palpitations and the Menopause Transition. Cedars-Sinai Smidt Heart Institute. Confirms the role of estrogen and progesterone in cardiac electrical function.

ZRT Laboratory. Skipping a Beat: Hormones and Heart Palpitations. Confirms that estrogen and progesterone influence how the heart maintains a regular rate and rhythm.

Intimate Rose. (2024). Menopause and Heart Palpitations. References research suggesting estrogen decline may increase heart rate stimulation by up to 16 beats per minute.

Nielsen, F.H., et al. (2007). Dietary magnesium deficiency induces heart rhythm changes, impairs glucose tolerance, and decreases serum cholesterol in post menopausal women. PubMed/USDA Agricultural Research Service. PMID: 17536123.

DiNicolantonio, J.J., et al. (2018). Magnesium for the prevention and treatment of cardiovascular disease. PMC/Open Heart. Confirms magnesium's role in cardiac rhythm regulation.

Tangvoraphonkchai, K., et al. (2017). The Role of Hypomagnesemia in Cardiac Arrhythmias. PMC. Confirms low magnesium levels are associated with increased risk of irregular heart rhythms.