Can You Have PCOS and Hypothyroidism at the Same Time? Yes Here’s What Your Body Is Trying to Tell You

You’ve been told you have PCOS. You’re doing everything “right” eating better, moving your body, trying to sleep and yet the weight won’t budge, your energy is in the gutter, and your periods are still a disaster. Sound familiar?

Here’s the thing nobody told you: PCOS and hypothyroidism often show up together. And when they do, every symptom gets amplified, every treatment feels less effective, and you’re left wondering why you still feel like garbage despite your best efforts. You’re not imagining it. You’re not weak. You might just be dealing with two hormonal conditions at once and one of them may be flying completely under the radar.

An estimated 8–13% of women of reproductive age worldwide have PCOS, and up to 70% of those cases go undiagnosed. Meanwhile, studies show that women with PCOS have at least twice the rate of subclinical hypothyroidism compared to women without PCOS and some research puts that number as high as 10–25%. That’s a massive overlap, and it has real consequences for your health.

This post is your no BS breakdown of what’s happening, why it matters, and what you can actually do about it.

What Are PCOS and Hypothyroidism, Really?

PCOS (Polycystic Ovary Syndrome) is a hormonal and metabolic disorder driven largely by excess androgens (think testosterone like hormones), irregular ovulation, and often insulin resistance. It shows up as irregular periods, weight gain, acne, hair thinning, and difficulty getting pregnant. We’ve covered the full picture in our Understanding PCOS and Hormone Balance guide if you want the deep dive.

Hypothyroidism is what happens when your thyroid gland that butterfly shaped powerhouse in your neck doesn’t produce enough thyroid hormone. Thyroid hormones regulate your metabolism, your energy, your body temperature, your mood, and yes, your reproductive system. When thyroid hormone output drops, everything slows down.

The most common cause of hypothyroidism is Hashimoto’s thyroiditis, an autoimmune condition where the immune system attacks the thyroid gland. And here’s where it gets interesting: women with PCOS show significantly higher rates of Hashimoto’s compared to women without PCOS about a threefold increase according to research published in PMC.

Both conditions involve the endocrine system. Both are worsened by inflammation. Both are connected to insulin resistance. They are not the same thing, but they feed each other and that’s the problem.

The Overlap Is Real: Why These Two Conditions Co Occur

This isn’t a coincidence. PCOS and hypothyroidism share biological roots that make them more likely to occur together:

Insulin resistance is a shared driver. Insulin resistance is central to PCOS affecting up to 70–80% of women with PCOS who are overweight, and 20–25% even in lean women. What’s less discussed is that hypothyroidism also promotes insulin resistance. When thyroid hormone is low, glucose metabolism slows, cells become less insulin sensitive, and the entire metabolic system starts struggling. Each condition makes the other harder to manage.

Chronic inflammation connects them. PCOS is characterized by low grade, systemic inflammation. Autoimmune thyroid disease (Hashimoto’s) is driven by immune dysregulation. These immune system patterns overlap and can reinforce each other, creating a feedback loop of worsening hormonal dysfunction. We broke this down in detail in our post on PCOS and Insulin Resistance.

The HPO and HPT axes talk to each other. Your brain regulates both your ovarian hormones (via the hypothalamic pituitary ovarian axis) and your thyroid hormones (via the hypothalamic pituitary thyroid axis). When one axis is out of balance, it creates stress on the other. Low thyroid hormone raises prolactin levels, which suppresses ovulation and disrupts the hormonal balance that PCOS already has working against it.

SHBG goes low in both conditions. Sex hormone binding globulin (SHBG) is a protein that binds excess androgens. Both PCOS and hypothyroidism suppress SHBG production, leaving more free androgens circulating in your bloodstream which means more acne, more hair loss, more irregular cycles.

A large Danish cohort study found that women with PCOS had more than double the risk of developing thyroid disease compared to age matched women without PCOS. That’s not a minor connection that’s a clinical red flag.

The Symptom Overlap That Gets People Missed

This is where things get messy and where people spend years being misdiagnosed or undertreated. PCOS and hypothyroidism share so many symptoms that it’s genuinely difficult to distinguish one from the other without proper testing.

Shared symptoms include:

• Unexplained weight gain or inability to lose weight
• Fatigue and low energy that doesn’t improve with rest
• Irregular or absent menstrual cycles
• Depression, anxiety, and brain fog
• Hair thinning or hair loss
• Fertility challenges
• Cold intolerance and slow metabolism

If this list looks familiar, you’re not imagining it and this is exactly why so many people go years without a proper diagnosis. The symptoms mimic each other, and without thorough lab work, one condition routinely masks the other.

A key technical note: PCOS is technically a diagnosis of exclusion, meaning thyroid dysfunction should be ruled out first. But in practice, many clinicians run partial panels and miss subclinical hypothyroidism a state where TSH is mildly elevated but symptoms are present. This is especially common in women whose labs fall in the “normal” range but sit at the high end of what’s considered acceptable.

Check out our deeper breakdown on PCOS and Hair Loss and Hashimoto’s vs. Hypothyroidism for more context on these overlapping patterns.

What Happens to Your Body When You Have Both

When PCOS and hypothyroidism occur together, the health stakes go up significantly. Research involving over 4,800 women with PCOS found that those who also had subclinical hypothyroidism had higher levels of insulin resistance, triglycerides, total cholesterol, LDL, and fasting blood glucose. Their HDL (the protective cholesterol) was lower, and their metabolic risk profile was worse across the board.

The combined impact includes:

• Worsened insulin resistance making weight loss harder and increasing type 2 diabetes risk
• Higher cardiovascular risk elevated CRP (inflammatory marker), homocysteine, and triglycerides
• More severe reproductive dysfunction greater ovulatory disruption and higher miscarriage risk
• Amplified mental health symptoms both conditions are independently linked to depression and anxiety; together, the psychological burden is compounded
• Fertility challenges untreated hypothyroidism is a major cause of anovulation, and when layered on PCOS, the path to conception becomes significantly harder

This is also relevant for those focused on weight management. If you’ve been on a PCOS weight loss plan and hitting walls, unaddressed thyroid dysfunction could be a major piece of the puzzle because thyroid hormones directly control your metabolic rate.

How to Actually Get Diagnosed (And What to Ask For)

This is where you need to advocate for yourself. Standard care often misses the dual diagnosis. Here’s what a thorough evaluation should include:

For thyroid assessment:

• TSH (thyroid stimulating hormone) the most common screen, but don’t stop here
• Free T3 and Free T4 the actual active thyroid hormones
• Reverse T3 can indicate conversion issues
• Anti TPO and anti thyroglobulin antibodies to check for Hashimoto’s autoimmunity
• Thyroid ultrasound if antibodies are elevated

For PCOS assessment:

• Total and free testosterone, DHEA S, androstenedione
• LH and FSH ratio
• Fasting insulin and glucose (HOMA IR)
• Full lipid panel
• Pelvic ultrasound

You can learn exactly what each of these markers means in our guide on What a Comprehensive Hormone Panel Actually Tests For and How to Read Your Blood Test Results.

At AK Twisted Wellness, our hormone balance services are built around comprehensive panels not the bare minimum that tells you “everything is fine” while you feel anything but. We look at the full picture, including thyroid function, because hormones don’t work in silos.

Managing PCOS and Hypothyroidism Together: Where to Start

The good news: when hypothyroidism is properly treated, PCOS symptoms often improve measurably. These conditions are manageable. You just need the right strategy.

Medical interventions:

• Levothyroxine (thyroid hormone replacement) first line treatment for hypothyroidism; optimizing thyroid function often improves ovulation, metabolism, and energy
• Metformin commonly used for insulin resistance in PCOS; also supports metabolic function in those with thyroid issues
• Hormonal support depending on your goals and symptoms, this may include targeted interventions for androgen excess or cycle regulation
• For women navigating perimenopause or menopause alongside these conditions, hormone balance support becomes even more critical our HRT resources for women are a good place to start

Lifestyle shifts that move the needle for both:

• Anti inflammatory nutrition reduce refined carbs and sugar, increase omega 3s, fiber, and antioxidant rich foods. For Hashimoto’s, reducing gluten and dairy may lower autoimmune activity
• Thyroid supportive nutrients selenium (Brazil nuts, seafood), iodine (in balanced amounts), and zinc all support thyroid hormone production
• Insulin focused exercise strength training and consistent movement improve insulin sensitivity, which benefits both conditions
• Sleep as a non negotiable both conditions are worsened by poor sleep; if your hormones are a mess, your recovery window is your sleep window. See our post on How Sleep Affects Your Hormones
• Stress management cortisol dysregulation worsens both thyroid function and androgen levels. Cortisol and belly fat is real, and it’s relevant here

If fatigue is one of your primary complaints, IV nutrient therapy can be a powerful adjunct while your body recalibrates supporting energy production at the cellular level, addressing nutrient deficiencies common in both conditions (like B12, magnesium, and selenium), and reducing inflammatory load. This is exactly where services like those offered at AK Twisted Wellness come in.

Frequently Asked Questions

1. Can you have PCOS and hypothyroidism at the same time? Yes, absolutely. These two conditions frequently co occur, and research shows that women with PCOS have at least twice the rate of subclinical hypothyroidism compared to women without PCOS. Neither condition directly causes the other, but shared mechanisms including insulin resistance, inflammation, and autoimmune activity create conditions where both can develop and worsen simultaneously.

2. How do I know if my symptoms are from PCOS or hypothyroidism? Honestly? Without lab work, it’s nearly impossible to tell the symptom overlap is that significant. Both cause weight gain, fatigue, irregular periods, depression, and hair loss. A comprehensive hormone panel that includes thyroid markers and reproductive/metabolic hormones is the only reliable way to sort this out. Don’t let anyone tell you to choose one to investigate.

3. Will treating my thyroid help my PCOS symptoms? Often, yes. When hypothyroidism is appropriately treated, many PCOS symptoms including menstrual irregularity, weight challenges, and insulin resistance can improve. This is why getting a full diagnosis matters: you could be fighting PCOS hard while an unaddressed thyroid condition is working against everything you’re doing.

4. Does PCOS cause Hashimoto’s disease? Not directly, but women with PCOS show a significantly higher prevalence of Hashimoto’s thyroiditis about three times higher than women without PCOS. Shared inflammatory and immune dysfunction pathways appear to create susceptibility to both. If you have PCOS, screening for thyroid antibodies is a smart move regardless of your TSH level.

5. Can AK Twisted Wellness help if I have both PCOS and hypothyroidism? Yes. Our hormone balance services go beyond basic thyroid or reproductive hormone screening. We look at the full endocrine picture thyroid function, androgens, insulin markers, cortisol, and more and build a personalized care plan around your actual results and symptoms. We also offer IV nutrient therapy to support energy, immune health, and metabolic function, which can be especially beneficial for those managing multiple hormonal conditions. Visit aktw.life or call (520) 710 8805 to get started.

6. Is this only a women’s issue? PCOS affects people with ovaries, but thyroid disease affects everyone and men are significantly underdiagnosed. Men with thyroid dysfunction can experience fatigue, weight changes, mood disruption, and even hormonal imbalances that affect testosterone levels and reproductive health. If you’re a man dealing with unexplained fatigue, metabolic sluggishness, or low testosterone, thyroid function should absolutely be part of your evaluation. See our resources on low testosterone and depression for more context.

The Bottom Line

PCOS and hypothyroidism are not the same condition. But they share enough biological overlap that having one puts you at meaningfully higher risk for the other and when both are present, your symptoms are worse, your metabolic risk is higher, and standard one size treatments are likely to fall short.

The answer isn’t to manage one and ignore the other. It’s to get the full picture comprehensive labs, honest interpretation, and a care plan that treats you as a whole person, not a list of isolated symptoms.

Your action steps, right now:

1. Request a full thyroid panel (TSH, Free T3, Free T4, anti TPO antibodies) not just TSH
2. If you have PCOS, ask about thyroid screening proactively, even without symptoms
3. Address insulin resistance through nutrition, movement, and targeted support
4. Find a provider who looks at the whole hormonal ecosystem, not just one piece at a time

At AK Twisted Wellness, that’s exactly what we do. Whole person. Personalized. No BS. Ready to stop guessing and start getting real answers?

 Visit aktw.life or call (520) 710 8805 to connect with our team.

References

1. Ach, T., et al. (2025). Subclinical Hypothyroidism in Polycystic Ovary Syndrome: Prevalence and Impact on Metabolic and Cardiovascular Risk. PMC/SAGE Journals. https://pmc.ncbi.nlm.nih.gov/articles/PMC12134519/
2. Palomba, S., et al. (2023). Polycystic Ovary Syndrome and Thyroid Disorder: A Comprehensive Narrative Review. Frontiers in Endocrinology. https://pmc.ncbi.nlm.nih.gov/articles/PMC10453810/
3. NIH/PMC. (2023). The Role of the Thyroid in Polycystic Ovary Syndrome. PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC10585146/
4. SpringerNature/BMC Endocrine Disorders. (2025). Prevalence of Subclinical Hypothyroidism in PCOS and Its Impact on Insulin Resistance: A Systematic Review and Meta Analysis. https://link.springer.com/article/10.1186/s12902 025 01896 2
5. Nature/Scientific Reports. (2025). Prevalence of Anti Thyroid Peroxidase Antibodies Among Women with PCOS. https://www.nature.com/articles/s41598 025 18582 x
6. World Health Organization. (2023). Polycystic Ovary Syndrome Fact Sheet. https://www.who.int/news room/fact sheets/detail/polycystic ovary syndrome
7. Office on Women’s Health, U.S. Department of Health and Human Services. PCOS Overview. https://www.womenshealth.gov/a z topics/polycystic ovary syndrome
8. Paloma Health. (2025). Simultaneous Treatment for PCOS & Hypothyroidism. https://www.palomahealth.com/learn/treatment pcos hypothyroidism
9. Healthgrades. (2023). PCOS and Hypothyroidism: What’s the Connection? https://resources.healthgrades.com/right care/thyroid disorders/pcos and hypothyroidism
10. Dove Press / International Journal of Women’s Health. (2023). Thyroid Hormones and Cardiometabolic Risk Factors in PCOS. https://www.dovepress.com/thyroid hormones and cardiometabolic risk factors in saudi women with  peer reviewed fulltext article IJWH

Disclaimer: This content is for informational and educational purposes only. It does not constitute medical, legal, or financial advice, and does not create a patient provider relationship. Always consult a qualified healthcare professional before making changes to your health care plan. For questions about AK Twisted Wellness services, visit aktw.life or call (520) 710 8805.