Wellness
How this New York start-up is redefining perimenopause
More than one billion women around the world will have experienced perimenopause and be post-menopausal by 2025

Menopause is having its moment. High-profile investments and start-ups with celebrity names attached have brought long-overdue attention to this once-taboo area of women’s health.
However, perimenopause, the transition phase that occurs about ten years before menopause, is still not getting nowhere near enough attention – that’s according to the New York-based wellness start-up NNABI.
Launched in February 2024, NNABI is opening up the conversation about perimenopause and revolutionising the way women feel during this extraordinary time in their lives.
Here, co-founders EJ Kim and Marina Pen tell us how.
Q: Tell us briefly about the co-founders
EJ Kim: Marina and I met as colleagues at a creative agency in New York City about a decade ago.
Our professional relationship grew into a friendship, and eventually, a business partnership.
With over 40 years of combined corporate experience, our superpower is our unparalleled expertise in brand building and marketing.
Marina Pen: EJ specializes in data-driven business strategy and consumer insights, while I focus on brand planning and creative strategy.
Despite our different strengths, we share two significant commonalities: we were both born and raised outside the United States—EJ in South Korea and I in Argentina—and we have both faced hormonal issues, with EJ managing PCOS and me dealing with endometriosis.
These personal experiences have always been a central part of our conversations, leading us to support each other through our highs and lows.
Q: What inspired you to create NNABI?
Marina Pen: During one of our conversations, we discovered we were both experiencing perimenopause, a phase we had heard little about.
The lack of resources and support was shocking, and we felt compelled to do something about it.
Determined to help women thrive during perimenopause, we combined our strengths, frustrations, and passion to create NNABI, a venture dedicated to providing support, solutions, and resources for women navigating this particular stage of life.
EJ Kim: The way we have all been portrayed in the media and the current narrative is not an accurate reflection of what we are and our experiences.
We felt a strong responsibility to change this, to portray these women as bold, confident, and vibrant, and to redefine the narrative around perimenopause.
Q: What does NNABI mean?
EJ Kim: NNABI (pronounced Na-Bi) means butterfly in Korean—a symbol of love, hope, beauty, transformation, and new beginnings.
Perimenopause is a biological transformation that all women experience, a process that leads us to become who we are meant to be, which is incredibly inspiring. The name not only reflects our core audience but also embodies NNABI’s mission: to support women as they navigate the significant changes of perimenopause, transforming a potentially confusing time into a period of empowerment and renewed vitality.
Q: How would you describe NNABI in a few words?
Marina Pen: NNABI is a pioneer in perimenopausal care, empowering women with targeted, holistic, and science-backed natural solutions.
Q: What needs did you identify in perimenopause?
EJ Kim: Perimenopause can start as early as age 35, yet there’s a significant lack of awareness and support, leaving many women to navigate this phase alone.
While the growing dialogue around menopause is great, perimenopause often gets overshadowed.
Many solutions address both peri/menopause simultaneously, which doesn’t fully support women in perimenopause who are still menstruating and can get pregnant.
When women are uninformed, they are more likely to make wrong decisions.

For example, our research involving 400 women aged 35-54 in the USA revealed that only 26.5 per cent attributed their symptoms to perimenopause, with the majority blaming lifestyle factors.
This misunderstanding underscores the urgent need for education and specialised support, which is central to NNABI’s mission.
We want NNABI to be the companion that turns confusion into clarity through credible information, supportive community and natural solutions made specifically for this phase.
It’s crucial to note that addressing this gap isn’t just about women’s health. At NNABI, we strongly believe it’s about societal health as well.
According to our research, four out of 10 perimenopausal women are the primary earners in their households. Consider the cost and the impact of not taking care of these women!
Q: What makes NNABI different?
Marina Pen: Unlike other women’s health brands, NNABI focuses specifically on perimenopause.
Our products, resources, and community are designed to address the unique needs of this phase.
Our flagship products, Peri Essential 5™ and Peri Essential 5™ CBD, are doctor-formulated, award-winning herbal supplements crafted for perimenopause.
They target five key areas of health that address the foundational needs of women in perimenopause —supporting the nervous system, optimising liver and digestive function, stabilizing blood sugar, boosting immunity, and reducing inflammation.
This holistic and integrative approach makes our product the most comprehensive, providing support for 10+ symptoms.
Both formulations contain the same six medical-grade herbs and adaptogens, with Peri Essential 5™ CBD adding broad-spectrum CBD (0% THC) for extra zen effect for those needing additional support with sleep, anxiety, and mood swings.
EJ: Our supplements are expertly developed in collaboration with top health professionals, including an OBGYN, naturopathic doctor, herbalist, functional medicine doctors, and a compounding pharmacist.
These experts have combined their clinical insights and the latest research to create scientifically sound and effective formulations.
Their critical role in product development ensures that our supplements meet high standards of efficacy and safety.
They remain an integral part of our advisory team, guiding us as we address the unique challenges of perimenopause.

Additionally, we have completed third-party testing and a physician-led open-label trial over 60 days to ensure that quality and efficacy are thoroughly verified.
This March, we were honoured with the NEXTY award in the Supplement Trailblazer category.
This award, recognizing a science-backed natural product that addresses niche, under-served needs, is a wonderful validation of our work.
It acknowledges that while our approach is innovative, it is also critically needed.
Q: How is NNABI changing the way women experience perimenopause?
EJ Kim: We are transforming the narrative of perimenopause from one of dread and confusion to one of empowerment and clarity.
We dispel myths about perimenopause, distinguish it from menopause, educate women about its science and biology, and create a supportive community.
Through the tools, solutions, and knowledge we offer, we help women recognise and manage symptoms naturally, enabling them to take control of their health and well-being.
We bring vibrant energy to this dialogue, celebrating what we call “Peri Power,” and aim to make this a modern, mainstream conversation.
Everything we do is research and data-driven, grounding us in rich insights that guide women through this transformative journey.
Q: How would you describe the impact and importance of your work?
Marina Pen: Our work is incredibly important.
Hearing from women who have benefited from our information and products drives us to keep going.
In the physician-led open-label trial we conducted, women reported tangible differences when taking our supplement.
However, we also want to emphasise that there is no quick fix or magic pill.
Our goal goes beyond alleviating symptoms; it’s about empowering a whole generation to approach perimenopause with knowledge and confidence, greatly enhancing their quality of life.
We aim to empower women to advocate for themselves, armed with knowledge that transforms their health and well-being during and beyond perimenopause.
Q: What is the best part about being an entrepreneur in this space?
Marina Pen: The most exhilarating part is seeing the real-world impact of our work—the stories from women who’ve reclaimed their vitality and joy thanks to the support they find with NNABI. It’s inspiring to connect with other trailblazers in women’s health,
further fuelling our passion to innovate and advocate for change. Being at the forefront of this transformative movement in healthcare is both a privilege and a profound responsibility.
EJ Kim: As users and the biggest fans of Peri Essential 5™ ourselves, we experience its tangible benefits first-hand.
It’s a gratifying and humbling feeling knowing that we’re not only helping ourselves but also others.
Speaking of others, we’re energised by the prospect of changing the game for the next generation of women entering this phase.
Our goal is for all women to fight and suffer less but thrive more, embodying the bold, ambitious spirit that defines them. Women are powerful, and we are committed to doing our part to support them.
To find out more about NNABI, visit nnabilife.com.
Mental health
Pilates may improve heart and metabolic health in sedentary women, study finds

A four-week Pilates programme may improve heart, metabolic and stress measures in previously sedentary women, a small study suggests.
Pilates is a mind-body form of exercise that has been linked to better fitness, balance, posture, muscular endurance, mental wellbeing and quality of life in different groups.
Built around breathing, concentration, control, precision, centring and flow, Pilates is already used in physiotherapy, rehabilitation and preventive health. The new study looked at whether a structured four-week programme could affect cardiovascular, metabolic, body and stress-related measures in sedentary adult women.
The longitudinal study included 30 sedentary women split into two age groups, 30 to 40 and 50 to 60.
All participants completed a standardised, supervised Pilates programme lasting four weeks, with three sessions a week lasting 50 to 60 minutes.
Researchers measured resting heart rate, systolic and diastolic blood pressure, body mass index, abdominal circumference, fasting blood glucose and serum cortisol at the start and end of the programme.
Systolic and diastolic blood pressure are the top and bottom readings in a blood pressure test. Cortisol is a hormone linked to the body’s stress response.
The four-week Pilates programme was linked to improvements in cardiovascular, metabolic, body and neuroendocrine measures, although not every change reached statistical significance within each age group.
In the younger group, significant reductions were seen in heart rate, blood pressure, body mass index and fasting blood glucose after the intervention.
The reduction in blood pressure after the programme was significantly greater in the older group than in the younger group.
Older participants also showed a greater reduction in glucose and cortisol levels after the intervention than younger participants.
Analysis also found significant links between cardiovascular, metabolic and neuroendocrine changes.
In the younger group, this was particularly seen between heart rate and blood pressure responses.
In the older group, it was particularly seen between changes in body mass index and fasting glucose.
The findings suggest Pilates could be a useful multidimensional exercise approach for cardiometabolic health and stress regulation in previously sedentary women.
The researchers said the larger reduction in blood pressure seen in the older group may reflect a higher cardiometabolic burden at the start, leaving more room for improvement after the programme.
The greater reduction in fasting glucose and cortisol in older participants may similarly suggest that people with higher baseline metabolic and neuroendocrine dysfunction could benefit more from structured exercise such as Pilates.
Although Pilates is known to improve body composition through energy use, neuromuscular activation and support for healthier habits, the researchers said the fall in body mass index over four weeks is unlikely to be explained by Pilates alone.
They noted that participants were also told to avoid alcohol, sugar-containing products and sugar-sweetened drinks during the intervention, which may have contributed to the change.
In the younger group, the link between heart rate and blood pressure suggested coordinated cardiovascular responses after Pilates.
The researchers also found that cortisol appeared to be linked to blood pressure and body mass index, suggesting stress-related changes may be tied to cardiovascular and body regulation after the intervention.
In the older group, the link between body mass index and fasting glucose highlighted the relationship between body fat and metabolic regulation.
A positive link between blood pressure and body mass index in this group also suggested that improvements in vascular regulation may be associated with reductions in body mass.
Overall, the findings suggest Pilates-related physiological changes may involve interconnected cardiovascular, body, metabolic and neuroendocrine mechanisms, with different response patterns by age.
The study has important limits. It did not include a non-exercise control group, so it cannot prove Pilates directly caused the changes.
The sample size was also small, which limits how far the findings can be applied more widely.
The authors also noted that cortisol was measured using a single fasting morning sample, which limits conclusions about broader hypothalamic-pituitary-adrenal axis regulation, the system involved in the body’s stress response.
They said larger studies with longer follow-up will be needed to confirm whether Pilates causes these physiological changes over time.
Wellness
Being female not a universal stroke risk factor for patients with AF, study finds

Female sex may not raise stroke risk across all atrial fibrillation (AF) patients, with higher risk mainly seen in women aged 75 and older, a study suggests.
Researchers said stroke prevention for women with the condition should be more personalised, especially for patients under 75.
Dr Amitabh C Pandey, director of cardiovascular translational research at Tulane University School of Medicine, said: “For years, female sex has been included as a risk factor along with other factors such as high blood pressure and diabetes, meaning women were more likely to be prescribed anticoagulants.
“Our study shows younger women may not have as much added stroke risk as previously thought, while older women, particularly those over 75, appear to have a higher risk that deserves close attention.”
The new Tulane University study challenges a long-standing assumption in heart care that being female automatically increases stroke risk for patients with atrial fibrillation.
Atrial fibrillation, often called AF, is a common heart rhythm disorder that causes the heart to beat irregularly.
It is associated with a higher risk of stroke and is often treated with anticoagulants, also known as blood thinners.
The study found that stroke risk did not increase equally across all female patients with AF.
Instead, researchers said being female may act more as a risk modifier, with increased stroke risk seen primarily among women aged 75 and older or those with a greater burden of other health conditions.
Clinicians often use a scoring system to decide whether people with AF should be prescribed blood thinners.
The system gives points for factors including age, heart failure, diabetes, previous stroke, vascular disease and high blood pressure.
Women also receive one point for sex alone.
Researchers said this can mean women with AF become eligible for blood thinners earlier or more often than men with otherwise similar risk profiles.
While blood thinners can help prevent clot-related strokes, they can also increase the risk of bruising, prolonged bleeding, gastrointestinal bleeding and other serious complications.
The researchers analysed approximately 950,000 patients with AF using TriNetX, a large anonymised electronic health record database.
They compared stroke outcomes between male and female patients across three age groups: younger than 65, 65 to 74, and 75 and older.
Male and female patients were matched based on age, other health problems and whether they had been prescribed anticoagulation medicine.
Among patients younger than 75, the study found no significant difference in one-year stroke risk between men and women.
However, among patients aged 75 and older, women had a modest but statistically significant increase in stroke risk compared with men.
In patients aged 75 and older with no additional risk factors beyond age, women had about one additional stroke per 629 patients compared with their male counterparts.
The findings support growing interest in a newer AF risk score, known as CHA2DS2-VA, which removes sex as a standalone risk factor.
However, researchers said more studies are needed and medical guidance remains inconsistent.
Han Feng, assistant professor at Tulane University School of Medicine, said: “This general approach came from women being underrepresented in AFib trials and studies comprising only about one-third of study populations.
“Our study shows not all women with AFib have the same risk profile, and these decisions should be individualised.
Pandey said: “These findings highlight the need for modern tools and approaches that can personalise risk profiles to individuals.
“The goal is not to undertreat patients who need stroke prevention, but to better identify who is most likely to benefit from anticoagulation and who may be exposed to unnecessary risk.”
Hormonal health
Iron deficiency in women: The tiredness everyone normalises

Article produced in association with Spital Clinic
Feeling permanently tired has become so normal for so many women that most of us have stopped questioning it. But one of the most common reasons behind it is also one of the easiest to miss – and one of the most satisfying to fix.
The tiredness that gets explained away
There’s a particular kind of tired that a lot of women simply live with. The mid-afternoon slump that no amount of coffee touches. Needing an early night and still waking up flat. Putting it all down to work, kids, stress, age or hormones – anything except a cause you could actually do something about.
Often, though, that’s exactly what it is: a cause you could do something about. Low iron is one of the most common reasons women feel wiped out, and because it builds so gradually, it rarely announces itself. You don’t wake up one morning feeling different. You just slowly get used to running on less, until “exhausted” starts to feel like your baseline.
Why women are far more likely to run low
Iron is what your body uses to carry oxygen around in your blood. When levels fall, everything has to work a little harder to do the same job – which is why feeling tired is usually the very first thing you notice.
The reason this affects women so disproportionately is simple: periods. Every cycle carries a small iron cost, and over months and years that quietly adds up. Pregnancy adds to the demand too, when the body’s iron needs rise sharply.
But heavy periods are the big one – left unchecked, they can steadily drain your iron, which is why the NHS treats them as something worth looking into rather than just putting up with.
So if your periods sit on the heavier side, you’re not just dealing with the inconvenience in the moment – you may be slowly draining your iron stores at the same time, month after month.
The reassuring part is that heavy periods can be treated, so it’s worth having them looked at rather than soldiering on.
What low iron actually feels like
Tiredness is the headline, but it’s rarely the only clue. Low iron can show up as feeling breathless going up stairs you used to manage without thinking, a foggy, can’t-quite-focus feeling, looking paler than usual, or noticing your heart racing or thumping for no obvious reason.
Then there are the stranger signs people almost never connect to iron: brittle nails, more hair than usual collecting in the brush, restless legs at night, and – oddly – craving and crunching ice. On their own, each of these is easy to shrug off. Lined up together, they’re very often the same story.
Why it so often slips under the radar
Part of the problem is that none of these symptoms screams “iron.” They’re vague, they overlap with ordinary life, and they arrive slowly enough that you adjust without realising. Most of us are also remarkably good at minimising our own tiredness – we assume everyone feels like this, so there’s nothing to mention.
The result is that low iron can go unaddressed for years, not because it’s hard to find, but because nobody thinks to look. It’s a genuinely common, genuinely treatable issue that quietly chips away at how good you’re allowed to feel.
When “heavy” periods are actually heavy
Here’s the tricky bit: most women have no real benchmark for what counts as heavy, because the only period we ever experience is our own. A useful rule of thumb is needing to change a pad or tampon every hour or two, bleeding that lasts longer than seven days, or passing clots bigger than a 10p coin.
NICE frames it even more usefully: periods count as heavy if they’re getting in the way of your life – physically, emotionally or socially. You don’t have to measure anything. If you’re planning your week around your period, doubling up on protection, or it’s leaving you drained, that’s reason enough to take it seriously.
And the good part is they don’t have to be permanent. If yours have crept up over time, getting them under control is worth it in its own right – and it often tackles the iron problem at its source, rather than topping you up only to lose it again next month.
How you actually find out
You can’t tell your iron levels from how you feel. Plenty of women feel rough with results that look “borderline fine,” and some feel reasonably okay while their reserves are already running low.
The only way to know is a straightforward blood test that checks both your blood count and your ferritin – the marker that reflects how much iron you’ve actually got stored away.
Ferritin is the one that matters here, because it tends to drop first, before a standard anaemia test would flag anything as wrong. That’s exactly why a woman can be told her bloods are “normal” and still feel exhausted: the headline number looks acceptable, but the reserves sitting behind it have been running down for a while.
The good news: it’s very fixable
This is the part worth holding onto. Iron deficiency is one of the more rewarding things to put right. The NHS approach is usually a course of iron tablets over several months to rebuild your stores, paired with a source of vitamin C – even just a glass of orange juice – to help your body absorb them properly.
Alongside that, dealing with whatever’s causing the loss in the first place is what stops you ending up back at square one.
Most women start to notice the difference within a few weeks, often well before their levels are fully restored. The fog lifts, the stairs get easier, and the version of “normal” you’d quietly resigned yourself to turns out not to have been normal at all.
The takeaway
The exhaustion so many women treat as a fixed fact of life frequently isn’t one. Low iron is common, it’s quick to check, and it’s straightforward to put right – but only if someone actually looks for it.
If you’ve been tired for longer than you can remember, especially if your periods are heavy, it’s worth getting your iron checked rather than explaining it away for another year. Speaking to a GP is usually all it takes to get that started – and more often than not, the fix turns out to be far simpler than the months of tiredness would suggest.
Disclaimer: This article is produced for informational purposes only and does not constitute medical advice, diagnosis or treatment. Clinical guidance referenced reflects published NHS and NICE information as at May 2026. Individual circumstances vary; readers are advised to consult a qualified healthcare professional before acting on any information in this article. This piece was produced in association with Spital Clinic, which provided background clinical information for editorial purposes. Hyperlinks to external sources are included for reference only and do not represent an endorsement of any product, service or organisation.
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