Karla F. Loken, DO, FACOOG
Chief Medical Officer, MenoHealth
Dr. Karla Loken is a board-certified OB/GYN with over two decades of clinical experience and a distinguished career driving innovation in women's health across the pharmaceutical, diagnostics, and medical device industries. Through her consultancy, Loken & Associates, Dr. Loken provides medical affairs expertise and fractional Chief Medical Officer (CMO) services, helping early-stage companies bridge the gap between scientific innovation and industry application. She serves as Chief Medical Officer to MenoHealth.
Professional profileArticles by Karla F. Loken, DO, FACOOG
Understanding menopauseHow Long Does Menopause Last?
The complete, evidence-based timeline — and why most women are told it’s shorter than it is
By Karla F. Loken, DO, FACOOG· 22 min read
Treatments and optionsIs HRT Safe? What 20+ Years of Research Actually Shows
Is HRT safe? The 2002 WHI scare has been substantially revised by 20+ years of data. Current evidence on safety, timing, and who should consider hormone therapy.
By Karla F. Loken, DO, FACOOG· 24 min read
Living wellSex After Menopause: How Intimacy Changes and How to Thrive
Sex after menopause changes for most women, but the specific changes are treatable. Evidence-based guide to GSM, desire, and how to thrive in intimacy.
By Karla F. Loken, DO, FACOOG· 18 min read
Menopause symptomsHow Long Do Hot Flashes Last? The Surprising Truth
How long do hot flashes last? SWAN data show a median 7.4 years, with 4.5 years after the final period. The surprising truth and what it means for treatment.
By Karla F. Loken, DO, FACOOG· 15 min read
Treatments and optionsBioidentical Hormones vs. Traditional HRT: The Honest Answer
Bioidentical hormones vs. traditional HRT: FDA-approved estradiol is bioidentical. Compounded BHRT is not the same. The honest answer, by the evidence.
By Karla F. Loken, DO, FACOOG· 19 min read
Menopause symptomsMenopause Weight Gain: Why It Happens and What Actually Helps
Menopause weight gain isn’t just about hormones. SWAN data show body composition shifts that need a different approach. What actually works, evidence-based.
By Karla F. Loken, DO, FACOOG· 21 min read
Menopause symptomsWhat Causes Hot Flashes? The Science Behind Vasomotor Symptoms
What causes hot flashes? Loss of estrogen activates KNDy neurons in the hypothalamus, narrowing your thermoneutral zone. The full science, explained.
By Karla F. Loken, DO, FACOOG· 21 min read
Treatments and optionsHRT Explained: Types, Benefits, and What to Know
What is HRT? A clinician-reviewed guide to types, routes, progestogen options, timing hypothesis, benefits, risks, and who should consider hormone therapy.
By Karla F. Loken, DO, FACOOG· 21 min read
Understanding menopausePerimenopause Symptoms: The Complete Guide
Perimenopause symptoms span vasomotor, sleep, mood, cognitive, body, sexual, and metabolic categories. A clinician-reviewed complete guide with what helps.
By Karla F. Loken, DO, FACOOG· 21 min read
Treatments and optionsMagnesium for Menopause: Does It Really Help?
Magnesium for menopause: what the trial evidence actually shows for hot flashes, sleep, mood, and bone. Honest review of forms, dosing, and where it fits.
By Karla F. Loken, DO, FACOOG· 12 min read
Menopause symptomsMenopause Memory Loss: What’s Normal and When to Seek Help
Menopause memory loss is real, common, and almost always temporary. SWAN data show cognitive symptoms recover in postmenopause. What helps and when to act.
By Karla F. Loken, DO, FACOOG· 12 min read
Menopause symptomsHot Flash Triggers: How to Identify and Manage Yours
Hot flash triggers — alcohol, heat, stress, spicy food, caffeine — push a narrowed thermoneutral zone over the edge. How to identify and manage yours.
By Karla F. Loken, DO, FACOOG· 12 min read
Menopause symptomsPerimenopause Mood Swings: A Survival Guide
Perimenopause mood swings hit hardest in late perimenopause. SWAN data show elevated depression risk. What helps: HRT, SSRIs, CBT, sleep, and proactive care.
By Karla F. Loken, DO, FACOOG· 13 min read
Living wellBest Foods for Menopause: An Evidence-Based Guide
The best foods for menopause, by the evidence: Mediterranean and DASH patterns, protein adequacy, calcium, vitamin D, whole-soy foods, and what to limit.
By Karla F. Loken, DO, FACOOG· 12 min read
Menopause symptomsCan Menopause Cause Depression? Understanding the Hormone-Mood Link
Can menopause cause depression? SWAN data say yes. Who’s at risk, what’s driving the hormone-mood link, and what actually works — therapy, SSRIs/SNRIs, HRT.
By Karla F. Loken, DO, FACOOG· 13 min read
Menopause symptomsMenopause and Anxiety: Why You Feel On Edge and How to Cope
Menopause anxiety: why it surges in perimenopause, when it’s worst, and what actually helps — from CBT and exercise to SSRIs, SNRIs, and hormone therapy.
By Karla F. Loken, DO, FACOOG· 14 min read
Menopause symptomsMenopause Insomnia: Why You Can’t Sleep and What to Do
Menopause insomnia: why sleep falls apart in perimenopause, what SWAN data show, and what actually works — from CBT-I to hormone and non-hormonal treatment.
By Karla F. Loken, DO, FACOOG· 13 min read
Treatments and optionsHRT Benefits: What Hormone Therapy Actually Does for You
HRT benefits, clearly explained: hot flashes, GSM, bone, cardiovascular, and mood. What the WHI 18-year follow-up, ELITE, KEEPS, and DOPS actually showed.
By Karla F. Loken, DO, FACOOG· 16 min read
Menopause symptomsMenopause Night Sweats: Causes and Effective Solutions
Menopause night sweats: what causes them, how long they last, and what actually works. Lifestyle, behavioral, non-hormonal, and hormonal options compared.
By Karla F. Loken, DO, FACOOG· 14 min read
Treatments and optionsMedication for Hot Flashes: SSRIs, SNRIs, Gabapentin, and More
Medication for hot flashes: SSRIs, SNRIs, gabapentin, oxybutynin, clonidine, and fezolinetant. What works, what each does, and when each is preferred.
By Karla F. Loken, DO, FACOOG· 15 min read
Treatments and optionsHow to Stop Hot Flashes: Evidence-Based Strategies
How to stop hot flashes, evidence-based: HRT, fezolinetant, SSRIs/SNRIs, gabapentin, CBT, and lifestyle — what works, for whom, and how to decide.
By Karla F. Loken, DO, FACOOG· 16 min read
Living wellThe Menopause Diet: What to Eat and What to Avoid
The evidence-supported menopause diet is Mediterranean-style with higher protein, calcium and vitamin D adequacy, and lower alcohol. The full framework.
By Karla F. Loken, DO, FACOOG· 16 min read
Understanding menopausePerimenopause vs. Menopause: Understanding the Key Differences
Perimenopause vs. menopause: one is a phase, the other is a date. The clinical difference, what it means for treatment, and where postmenopause fits.
By Karla F. Loken, DO, FACOOG· 14 min read
Understanding menopauseWhat Age Does Perimenopause Start? Understanding the Transition
Perimenopause typically starts between 40 and 44, but a meaningful minority begin earlier. What sets the timing, the early signs, and when to seek care.
By Karla F. Loken, DO, FACOOG· 16 min read
Living wellPainful Sex After Menopause: Understanding GSM and Your Options
Painful sex after menopause has a name — GSM — and effective treatments. Vaginal estrogen, DHEA, lubricants, and how to talk to your doctor.
By Karla F. Loken, DO, FACOOG· 12 min read
Living wellHow to Sleep Better During Perimenopause: A Practical Guide
Perimenopause sleep falls apart from night sweats, hormones, and emerging sleep disorders. What actually works to fix it, ranked by evidence.
By Karla F. Loken, DO, FACOOG· 12 min read
Menopause symptomsSkin Changes in Menopause: What to Expect and How to Adapt
Menopause skin changes are real and predictable. What estrogen loss does to collagen, hydration, and healing — and what the evidence says actually works.
By Karla F. Loken, DO, FACOOG· 13 min read
Menopause symptomsMenopause Dizziness: Why You Feel Off Balance
Menopause dizziness is real but has overlapping causes worth sorting out. Why it happens, what else to rule out, and the changes that help most women feel steady.
By Karla F. Loken, DO, FACOOG· 11 min read
Menopause symptomsMenopause Heart Palpitations: When to Worry and What to Do
Heart palpitations during menopause are common and often benign. When they’re tied to hot flushes, when they need evaluation, and what actually helps.
By Karla F. Loken, DO, FACOOG· 12 min read
Menopause symptomsMenopause Rage: Why You’re So Angry and What’s Behind It
Menopause rage is a real symptom of hormonal fluctuation, not a personality change. Why the anger flares, what amplifies it, and what actually helps it ease.
By Karla F. Loken, DO, FACOOG· 11 min read
Menopause symptomsMenopause Bloating: Causes and Practical Relief
Menopause bloating is driven by hormonal shifts in gut motility, fluid retention, and the microbiome. Why it happens, common triggers, and what actually helps.
By Karla F. Loken, DO, FACOOG· 12 min read
Menopause symptomsMenopause Itchy Skin: Why It Happens and How to Soothe It
Menopause itchy skin is driven by falling estrogen. Why it happens, what makes it worse at night, and the skincare and lifestyle changes that actually help.
By Karla F. Loken, DO, FACOOG· 11 min read
Understanding menopauseSurgical Menopause: What to Expect After Hysterectomy or Oophorectomy
Surgical menopause causes abrupt, intense symptoms when both ovaries are removed. What to expect, when HRT is right, and how to manage symptoms after surgery.
By Karla F. Loken, DO, FACOOG· 17 min read
Treatments and optionsIs Vaginal Estrogen Safe? What the Research Actually Shows
Is vaginal estrogen safe? What Crandall 2018 and the Menopause Society 2020 statement actually show — including in women with breast cancer history.
By Karla F. Loken, DO, FACOOG· 14 min read
Menopause symptomsMenopause Headaches and Migraines: Causes and Relief
Menopause headaches and migraines: why perimenopause is volatile, why postmenopause often quiets things, and what helps — including the HRT nuance.
By Karla F. Loken, DO, FACOOG· 11 min read
Menopause symptomsJoint Pain and Menopause: The Overlooked Symptom
Menopause joint pain affects 40-60% of women and is often dismissed. What’s driving it, what helps, and how to tell it from inflammatory arthritis.
By Karla F. Loken, DO, FACOOG· 13 min read
Menopause symptomsMenopause Fatigue: Why You’re Exhausted and What to Do
Menopause fatigue is rarely about one thing. Sleep, hormones, mood, and medical contributors — what actually helps and when to escalate, explained.
By Karla F. Loken, DO, FACOOG· 14 min read
Menopause symptomsBrain Fog and Menopause: What’s Happening and Will It Pass?
Menopause brain fog is real, common, and almost always temporary. SWAN data, what helps, when to escalate — a clinician-reviewed guide for midlife women.
By Karla F. Loken, DO, FACOOG· 13 min read
Menopause symptomsMenopause Acne: Why It Happens and How to Treat It
Menopause acne is different from teenage acne — different distribution, different drivers, different treatments. What works, what doesn’t, and when to see a clinician.
By Karla F. Loken, DO, FACOOG· 11 min read
Treatments and optionsNatural Remedies for Menopause: An Evidence Review
Natural remedies for menopause: what the trials actually show. CBT and hypnosis lead the evidence. Soy, black cohosh, and others reviewed honestly.
By Karla F. Loken, DO, FACOOG· 18 min read
Menopause symptomsMenopause Hair Loss: Causes and Effective Treatments
Menopause hair loss is real and treatable. Causes of female pattern hair loss, what to rule out first, and what actually works — from minoxidil to spironolactone.
By Karla F. Loken, DO, FACOOG· 16 min read
Treatments and optionsTamoxifen Side Effects: Managing Menopause Symptoms During Treatment
Tamoxifen side effects often mirror menopause — hot flushes, vaginal symptoms, mood changes. Evidence-based, non-hormonal options for managing them safely.
By Karla F. Loken, DO, FACOOG· 17 min read
Treatments and optionsMenopause Supplements: What Actually Works and What Doesn’t
What menopause supplements actually work — and what doesn’t. An honest evidence review of black cohosh, soy, magnesium, vitamin D, and the rest.
By Karla F. Loken, DO, FACOOG· 16 min read
Treatments and optionsVeozah (Fezolinetant): The New Non-Hormonal Hot Flash Medication
Veozah (fezolinetant) is a new non-hormonal hot flash medication. How it works, what SKYLIGHT trial data shows, who it fits, and the FDA liver warning.
By Karla F. Loken, DO, FACOOG· 15 min read
Menopause symptomsMenopause Belly: Why It Happens and What Actually Works
Menopause belly is real, biological, and not a discipline problem. Why estrogen shifts where you store fat, and what actually works to address it.
By Karla F. Loken, DO, FACOOG· 16 min read
BasicsThe Stages of Menopause Explained: Perimenopause Through Postmenopause
The stages of menopause — late reproductive, perimenopause, menopause, and postmenopause — explained using the STRAW+10 framework specialists actually use.
By Karla F. Loken, DO, FACOOG· 19 min read