The LongHer Life

I first heard about Rythmia back in 2018 and remember wishing I could go. So having their Chief Medical Officer on the show was a real pinch me moment for me.

If you want to do this work with me, work with me one on one. You can also book a free 15 minute call with me here.

My guest is Dr. Jeff McNairy, Psy.D., M.P.H., Chief Medical Officer at Rythmia Life Advancement Center in Costa Rica, the world's only medically licensed plant medicine retreat. Dr. Jeff has spent more than 25 years in mental...

NAD+ is everywhere in the longevity space right now, and there's still so much confusion about it. Is it a peptide? (It's not, it's a coenzyme.) Why does it start dropping in your early 30s? And why can't you just swallow it in a capsule and call it a day?

If you want to do this work with me, work with me one on one. I see women every week for peptides, nervous system, nutrition and longevity, and you can book a free 15 minute call with me here.

In this episode I break down what...

GLP-1s are peptides. The P literally stands for peptide. Your body makes its own GLP-1 after every single meal, and it's gone within a couple of minutes by design. The drugs are that same signal, engineered so it never goes away, and that one difference explains both how well they work and almost everything women struggle with on them.

If you want to do this work with me, work with me one on one. I see women every week for peptides, nervous system, nutrition and longevity, and you can book a free 15 minute call with me...

This is my live masterclass, The Exhale, from September. A few hundred women showed up live, and it's one of my favourite classes I've ever taught, so I'm giving you the whole thing here.

We go deep on peptides, longevity and the nervous system, and why the mind and nervous system have to come first before the body work and the advanced tools. I share my own postpartum anxiety story, the pattern I keep seeing in women, and why we can't out-peptide a dysregulated nervous system. Then I break down how cortisol shuts down growth hormone peptides...

Part one was how to look like yourself again. Part two was how to feel like yourself again. Part three is who you actually are, and it's the one that decides whether any of it sticks.

I open with something heavy from this week: I can't talk about peptides on Instagram anymore. I had to archive about 20 posts, my TikTok was deleted, and I've been blocked from DMs for three days. So I talk about building on borrowed land, and where I can still speak freely.

Then the three women I meet over and over...

Today is how to FEEL like yourself again, and better, because you can get the body and still not feel like you.

I start with the sentence I hear on every call: "I just don't feel like myself." Then the three ways it actually shows up. Feeling flat with no spark, even when life looks good on paper. Tired but wired, snapping over nothing, awake at 3 AM. And numb, living in your head, disconnected from your own body.

Then the solutions. Breath and long exhales, heart coherence at about six breaths a minute, and what...

I don't want you chasing the woman you were two years ago or before kids. I want you stepping into the woman you're becoming. This is part one of a three part series on how to look like yourself again, and better.

We get honest about weight and body composition: why lighter doesn't always mean better, why so many women are trading fat for frailty, and why a GLP-1 plateau usually isn't a dose problem. Across published trials of semaglutide and tirzepatide, lean mass makes up 25 to 39% of the weight lost, and muscle is the tissue that...

Welcome to The LongHer Life, formerly Biohacking with Brittany. To kick off this new era, I'm not giving you a list of supplements. I'm giving you me. These are 10 things you probably don't know about me, and some of them I've never said on the mic before.

I share why I outgrew Biohacking with Brittany, and I read you the letter I wrote to my old self to close that chapter. Then we go deep: growing up in South Africa and moving to Canada at 7, my parents' divorce and caring for them as a teenager, growing up...

Magic mushrooms used to mean a party drug or a bad trip. Today psilocybin is in phase 3 clinical trials, and more women than you would ever guess are quietly microdosing for anxiety, creativity and the mental load of motherhood. In this episode I share why I microdose, how I do it, and everything I wish every woman knew before she tried it.

I explain what psilocybin actually is, how much a microdose really is (and what I take), and what happens in your brain: the serotonin 2A receptor, BDNF, neuroplasticity, and why the loop of overthinking goes...

There are two maps of the same body that almost never get laid on top of each other. One is over a thousand years old and runs up your midline naming energy centers. One is about a hundred years old and runs up the same midline naming glands. In this episode I put them on top of each other, and then I add the peptides.

I go center by center, all eight of them, and for each one I give you what the ancient text actually says, what the modern reading says, the gland that lives there...

You've probably heard that your ovaries age 2.5x times faster than the rest of your body. I went looking for that study. It does not exist.

In this episode I trace that number back to an uncited supplement company blog post, and then I give you the one that is real: ovarian aging shows up 15 to 20 years earlier than in any other tissue in your body. Your ovaries are not a fertility organ. They are the organ that sets the pace for your bones, your heart, your brain and how long you live.

This is...

In this Q&A I get honest about getting banned on TikTok, the manifestation moment that turned it around, and the piece of women's health I think almost everyone is missing. Then I answer your questions on longevity, the two new products I am using right now, and what I've planned for the fall.

Work with me one on one. I am opening a limited number of spots in my new inner circle, a three month program built around all six health pillars, including the intuition work. Book a free 15 minute discovery call and I will walk...

I'm a biohacker with a peptide fridge, and right now I am injecting absolutely nothing. That is probably not what you expected me to say. The internet makes it look like the goal is more compounds, stacked higher, forever. It is not. The goal is to use the right tool for a specific window, then come off it.

In this solo episode I open my actual fridge. I walk through every peptide I have run recently, the real dose, why it went in, why it came out, and why I am on a full break right now...

This is a landmark day for peptides! I recorded this at 6 AM the morning between day one and day two of the FDA's Pharmacy Compounding Advisory Committee (PCAC) meeting, and I'm breaking down exactly what happened, why it matters, and what it means for you depending on where you live.

On day one, the committee voted YES on all four peptides they reviewed: BPC-157, TB-500, KPV, and MOTS-c. This went against the FDA scientists' own recommendation. There was an audible gasp in the room. Today they're voting on DSIP, Epitalon, and Semax, and I expect all three...

Blood sugar is the master dial. If your energy crashes at 3pm, if the cravings run you, if the belly weight will not move no matter how clean you eat, this is not a willpower problem. It is a blood sugar problem, and it is fixable.

In this episode I break down blood sugar for women from the ground up: what glucose and insulin actually do, the six levers that throw them off, the full diabetes spectrum from prediabetes through Types 1 to 4 (including the lean, skinny fat Type 4 that surprised me), and the exact labs and CGMs...

You have a wedding, a vacation, a babymoon, a reunion, or a big shoot in about two months, and you want to walk in glowing. In this episode I give you my full 8 week glow up protocol, the same one I build for my one on one clients, and it is all from the inside out.

I break down what glow actually is on a physiological level: collagen, glycation, inflammation and puffiness, gut health, circulation and lymph, and body composition. Then I walk you through the labs to run, my three pillars of nutrition, lifestyle, and supplements...

In this episode, I'm giving you the full sleep protocol I built for myself and for the women I work with. Not just how to sleep longer, but how to make the hours you actually get deeper, more restorative, and more efficient. Even if you have a kid in your bed. Even if you are perimenopausal and running hot. Even if you have been broken for years.

I share the exact protein-before-bed hack that ended my 3 AM wake-ups, the caffeine half-life math (why your 2 PM coffee is still in your system at 10 PM), why I do not...

Perimenopause is not a slow fade. It is a hormonal storm that lasts about a decade. Estrogen swings, progesterone slips first, testosterone quietly declines, and growth hormone falls alongside all of it. That is why the workout that worked at 25 stops working at 45. It is why women come to me saying "I am doing everything right and the scale will not budge." Your biology is changing, and your approach has to change with it.

In this episode I'm giving you my top recommendations for every pillar so you walk away with a real protocol, not a pile...

This week is a Q&A episode in two parts.

In Part 1, I give you the honest, real-numbers breakdown of the four Central American countries we keep weighing for our family: Nicaragua, Costa Rica, Panama, and Mexico. Rent, nannies, food, healthcare, schools, and flights from Canada.

In Part 2, I answer three of the peptide questions you sent me: the Wolverine blend for an ACL tear, Selank vs psilocybin microdosing, and whether GHK-Cu actually works in a body cream. 

Join The LongHer Life for women-specific guidance on peptides, hormones, and longevity.

...

Your body after a baby was never a calorie problem. It is a metabolic one. In this Her Stack episode I am walking you through exactly how to restore your metabolism so body composition follows. The goal is not weight loss. The goal is metabolic restoration. Body comp is downstream.

I am breaking down the four drivers that actually run body composition (insulin, thyroid, sleep, growth hormone), the four pillars to address them (nutrition, lifestyle, supplements, peptides), and the exact peptide sequencing for women. Plus my honest take on GLP-1s including semaglutide, tirzepatide, and retatrutide, where...

In this Q&A episode of the Her Stack Series, I'm answering the peptide questions you're asking me every single day in my DMs and comments: 

→ Can I take peptides while breastfeeding?

→ What if I have a personal or family history of cancer?

→ Why won't my postpartum belly fat budge, even when I'm doing everything "right"?

→ Blends vs. single peptides, which is right for me?

→ How do I build my own peptide stack without ending up on eight injections a day?

I'm unfiltered in this one. I share why t...

In this Her Stack series episode, I open up about maternal mental health, postpartum anxiety, and the invisible biological load mothers carry long after the six-week checkup is over. This episode is not just for the newly postpartum mother. It is for the mother whose kids are four, eight, fifteen, and still asking herself why she does not feel like herself.

I share why motherhood structurally changes the brain, hormones, and nervous system, and why so many mothers are left feeling anxious, foggy, depleted, or unlike themselves without ever being properly screened or supported. I walk you...

Dr. Stephanie Venn-Watson, veterinary epidemiologist, public health scientist, and co-founder of Fatty15 (code: BIOHACKINGBRITTANY), shares the latest science on C15:0, an odd-chain saturated fatty acid she describes as the first essential fatty acid to emerge in over 90 years.

This conversation explores why C15 may be foundational for cellular resilience, metabolic health, liver health, brain development, and long-term vitality. Stephanie explains how low C15:0 levels may contribute to fragile cells, accelerated aging, and modern health issues, and why this nutrient matters not just for adults, but for pregnancy, breastfeeding, babies, and children.

We also talk about...

I share my full protocol for skin, hair, and nails, including the nutrition, lifestyle, supplements, skincare, peptides, and bioregulators I am using to support healthier aging.

I also explain why beauty is not just topical. Skin, hair, and nails are deeply connected to estrogen, protein intake, collagen production, inflammation, vascular supply, mitochondrial health, and hormone transitions like postpartum, perimenopause, and menopause.

Listen if you want a female-specific beauty and longevity protocol that goes beyond collagen powder and skincare trends, and helps you understand how to support your skin from the cellular level.

Join...

I'm kicking off the brand-new Her Stack series — a women's health-focused series designed to break down common goals through nutrition, lifestyle, biohacking, supplements, and peptides.

Today's focus is energy: why so many women feel tired, wired, depleted, or stuck in the afternoon crash cycle, and what it actually takes to rebuild energy from the foundation up.

I talk about mitochondrial health, circadian rhythm, HPA axis dysregulation, postpartum and perimenopause-related energy shifts, hydration, protein, sleep, movement, peptides, and the 12-week framework I would use to start feeling like yourself again.

Join The LongHer Life fo...

I'm finally sharing my full peptide journey: how it started after weaning Callahan, why MOTS-c was my first, and the exact stack I'm using right now for energy, skin, and longevity.

The peptide world is still so bro-dominated, and women are being left out of a conversation that could genuinely change how we move through fertility, postpartum, perimenopause, and beyond. In this episode, I'm breaking down why peptides aren't supplements, why cycling matters, and how your protocol should shift across every season of womanhood.

I'm also opening up about postpartum anxiety, the tools I've built...

Colleen Freeland, intuitive drinking coach, host of It's Not About the Alcohol podcast, and founder of Emotional Sobriety Coaching, shares a more compassionate and emotionally intelligent conversation around alcohol, especially for high-achieving women who want to understand their habits without shame.

We talk about mindful drinking, emotional coping, mom wine culture, relationships, projection, family dynamics, emotional regulation, and what women can actually do to feel safer, calmer, and more connected without relying on alcohol.

This episode looks at the deeper reasons women drink and challenges the idea that the only path forward is black-and-white sobriety...

Aimee Raupp, fertility expert, licensed acupuncturist, herbalist, and author of Yes, You Can Get Pregnant, shares a more hopeful and expansive conversation around fertility, especially for women in their late 30s and 40s. 

She explains why fertility is about far more than age, and how inflammation, immune health, sperm quality, uterine health, mitochondrial function, and lifestyle all shape the bigger picture.

This episode looks at the fear-based messaging women are still given around fertility and challenges the idea that turning 35 automatically means your chances are over. 

We also talk about endometriosis, miscarriage, protein in...

Priyanka Jain, co-founder and CEO of Evvy (code: BRITTANY), shares how being dismissed by the medical system led her to help transform women's health through better vaginal microbiome data.

We talk about why the vaginal microbiome matters, how dysbiosis can drive inflammation even without obvious symptoms, and why women still face outdated standards of care. We also cover recurrent UTIs, yeast infections, fertility, pregnancy, postpartum, perimenopause, probiotics, and at-home testing.

This is a practical conversation for women who want to better understand their bodies, stop brushing off symptoms, and use better data to support long-term...

Dr. Natalie Crawford (board-certified OBGYN + REI fertility specialist) shares why fertility starts in "trimester zero," how inflammation impacts egg + sperm quality, and how to avoid pricey IVF add-ons that aren't backed by solid science.

You'll walk away with: The key labs to track, the biggest lifestyle levers for both partners (including cannabis), and the hormone-testing mistakes that can accidentally act like birth control.

Want protocols built specifically for women, live coaching, and real talk about peptides and longevity? That's what The LongHer Life is for. Private. Uncensored. Ongoing. https://biohackingbrittany.com/pages/longherlife

...

Keegan Downer (Founder of mindfulMEDS) shares how he went from alcohol addiction and a near-suicidal breaking point, to recovery and to building one of Canada's most recognized microdosing education brands, and why psilocybin doesn't have to be "woo." 

We also get super practical: What microdosing actually feels like day-to-day, why it can hit women differently (especially moms), how psilocybin compares to SSRIs (Selective Serotonin Reuptake Inhibitor) when it comes to emotional processing, and why "wine o'clock" culture is quietly keeping so many women stuck in a stress-and-numb cycle.

Want protocols built specifically for women, live c...

In Day 2 of The Feminine Longevity Shift free live masterclass, I unpack why so many women are doing "everything right". Yet still feel inflamed, exhausted, or disconnected.

This isn't about more discipline or optimization.

It's about recognizing how misalignment shows up in the female body and what actually supports long-term vitality, hormonal resilience, and healthy aging.

Want protocols built specifically for women, live coaching, and real talk about peptides and longevity? That's what The LongHer Life is for. Private. Uncensored. Ongoing. https://biohackingbrittany.com/pages/longherlife

I TALK ABOUT: 

05:45...

In this free live masterclass, I connect the dots between women's healthspan, chronic stress, and the biological cost of living out of alignment. Even when your habits look "healthy." 

I talk about why the longevity conversation has been dominated by male-centered frameworks, and what happens when women override their intuition for years (in work, relationships, family dynamics, and daily decisions).

This is an invitation to stop treating intuition like a "soft" topic—and start seeing it as a health input that shapes inflammation, hormones, nervous system regulation, and long-term vitality.

Want protocols built spe...

Dr. Holly Duckworth (PhD) shares how she went from mechanical engineering → psychology → deep hypnosis work (QHHT), and why "higher self" doesn't have to be woo. Especially when you understand how fear, trauma responses, and nervous system dysregulation run the show.

We also get super practical: How to recognize dysregulation (hello, sensory sensitivity + road rage), why "therapy doesn't work" for some people until the body is regulated first, and how gratitude + nature can become daily tools for coming back to safety.

Want protocols built specifically for women, live coaching, and real talk about peptides and longevity? That...

Modern longevity culture can make "the perfect protocol" feel like the answer—especially when you're a busy mom who wants more energy now and a longer healthspan.

Dan Pardi from Qualia (code: BRITTANY) breaks down what's changed in longevity science over the last 25 years—and why "healthspan" (feeling strong, clear, and capable for longer) matters more than simply living longer. 

We get into the real trade-offs of fasting, protein, and vitality, plus a clear explanation of what stem cells actually do, why they decline with age, and how "stem cell wellness" differs from clinic-based stem cell...

I'm recording from Nicaragua with a real-time life + business update because everything is shifting.

I'm rebranding beyond "biohacking" into women's longevity, intuitive health, and living in alignment. I'm also introducing The LongHer Life Community, my private community with weekly protocols, biweekly calls + Q&As, and exclusive guest interviews.

And I'm sharing why my family is in Central America, what we're optimizing for with Callahan, and why we're considering a nature-first move.

If you want health to feel simpler and more sustainable, this episode is for you.

I TALK ABOUT: 

04:45...

Modern women are doing the most—tracking, supplementing, optimizing—yet still feel tired, inflamed, and strangely off. And sometimes the issue isn't another protocol. It's the life you're living.

Queen Oluwatobiloba explores women's holistic wellness through a lens we don't talk about enough: alignment. We unpack how your environment can mirror your internal season, why "being stuck" drains your vitality, and how discomfort is often the clearest sign you're choosing something true.

We also go into motherhood as an initiation (and why mom guilt is so biologically sticky), plus the missing longevity conversation: no supplement can...

Modern success can humble your nervous system fast. Especially when your life looks "perfect" on paper, but your body feels flat, restless, or quietly done.

Silvia Resnik unpacks the hidden ache so many high-achieving women carry: doing everything "right" and still feeling unfulfilled. We explore the subtle signs of misalignment, how productivity becomes a coping strategy, and why nervous system safety is often the missing piece behind burnout and people-pleasing.

We also get into what it actually looks like to rebuild self-trust without blowing up your whole life—tiny, brave choices that bring you back to...

Modern motherhood can make "detox" feel like the answer—especially when you're exhausted and convinced you just need the right protocol to get your body back. Eva Hooft unpacks why the do-more, cleanse-harder mindset can keep women stuck, and how real healing starts with safety, not force.

We talk detox through a nervous system + mineral lens: how stress shuts down digestion and drainage, why aggressive "pulling" can backfire when you're depleted, and what it looks like to rebuild your terrain with simple, foundational support.

We also get real about the emotional side—when wellness becomes obse...

If you have been trying for a baby (or you are not even trying yet but you feel that quiet fear in the background), this conversation is a reset. 

Gabriela Rosa is a leading practitioner in preconception and infertility care, and she explains why fertility is a team sport, why prevention beats panic, and what actually moves the needle for both partners.

WE TALK ABOUT: 

00:10 - Why preconception health is the missing "first step" most couples skip

05:15 - How fear of infertility starts before you even try

07:15 - Making fe...