My Top 3 PCOS Supplements — Inositol (3+ Years), Vitamin D3 (2+ Years) & Berberine

Quick Answer :

I've been taking inositol for at least three years, and have added other supplements one by one since then for symptom relief. Setting aside my personal experience, all three — inositol, Vitamin D3, and berberine — are still being actively researched, and the current evidence sits somewhere around "promising, but conclusions are still limited." This post is my personal supplement stack, based on what I've actually felt — separate from what the research says.

The Story

After my PCOS diagnosis, I went to several OB-GYN clinics.

One doctor recommended evening primrose oil and gamma-linolenic acid.

I didn't take them. At the time, I wasn't really interested in supplements.

What eventually pushed me to look was severe intrusive thoughts and scalp discharge — I wanted to find something that might help.

📄 Research Note Women with PCOS have a significantly higher risk of OCD diagnosis (OR 1.37) and greater OCD symptom severity.
— Brutocao C et al., Endocrine. 2018;62(2):318-325. | https://pubmed.ncbi.nlm.nih.gov/30066285/

📄 Research Note Women with PCOS showed higher scores on anger-related scales and anxiety/depression measures, and anxiety scores were positively correlated with DHEAS levels.
— Özdil K et al., Psychiatry Investigation. 2017. | https://pmc.ncbi.nlm.nih.gov/articles/PMC5353166/

I only found out later that the intrusive thoughts and that edge in my emotions might not have been unrelated to PCOS.
At the time, I just thought something was wrong with me.

That's how it started — through algorithm recommendations and late-night Googling, the first thing I picked was inositol.
The effects came on fast and felt significant, which is why I recommend it first. I've been taking inositol for at least three years.

Inositol — The First Supplement I've Been Taking for 3+ Years

Scalp discharge, flaking, emotional instability. On the first day I took inositol, the scalp itching dropped off within two hours. The negative thoughts that had been filling my head settled into something calmer. My hair texture changed too.

Separate from any research, I'm convinced these changes were due to inositol — because at the time, it was the only supplement or medication I was taking.

📄 Research Note A 2024 meta-analysis (30 RCTs, 2,230 participants) concluded that current studies are too small and heterogeneous to support a strong guideline-level recommendation. A separate meta-analysis from the same period (26 RCTs) reported significant improvements in insulin, androgens, and BMI. The divergence comes down to differences in inclusion criteria, evidence quality, heterogeneity, comparator groups, and outcome-level certainty. For some outcomes, effects were comparable to metformin, and GI side effects may be lower.
— Fitz V et al., J Clin Endocrinol Metab. 2024. | PMID 38163998
— Greff D et al., Reprod Biol Endocrinol. 2023. | PMID 36703143

💡 Want to go deeper?

From scalp to emotions — everything that changed over 3 years of taking inositol, covered in a dedicated post.
→ [My 3-Year Inositol Experience — From Scalp to Mood]

Vitamin D3 — Followed the Crowd, and It Helped My Scalp Condition Too

I started Vitamin D3 after seeing other people with PCOS mention it in their posts. The most noticeable change was relief from what seemed like psoriasis or seborrheic dermatitis on my scalp. I also feel like it contributes to a subtle positive shift in mood. Before and after adding D3, I notice a gentle difference in both my mood and scalp inflammation.

There's research showing that vitamin D deficiency is common in women with PCOS. Not many people think to take it in the context of PCOS, but I've felt a difference, so it's stayed in my stack. That said, the evidence that D3 supplementation consistently improves PCOS symptoms across the board isn't strong enough yet — that's just my subjective experience talking.

📄 Research Note Vitamin D deficiency is commonly reported in women with PCOS. Some meta-analyses have noted improvements in total testosterone, high-sensitivity CRP, and total antioxidant capacity following supplementation, but findings have not been consistent across all markers.
— Zhao Y et al., Ann Palliat Med. 2021;10(1):114-129. | https://apm.amegroups.org/article/view/61538/html

💡 Want to go deeper?

My skin improved before anything else — the relationship between Vitamin D3 and PCOS, covered in a dedicated post.
→ [Vitamin D3 and PCOS — My Skin Changed First]

Berberine — Started for Blood Sugar, Ended Up Noticing Gut Motility, Weight Loss, and Less Aggression

I started berberine for blood sugar management and insulin resistance.

But the first things I noticed weren't blood sugar-related at all — it was better gut motility and a noticeable shift in my emotional edge. Within two hours of taking berberine, I'd almost always need to use the bathroom. And emotionally, things felt calmer. It was only after things calmed down that I realized how sharp my baseline had been.

I can't say from a research standpoint that berberine directly regulates emotion — that's purely subjective. My best guess is that stabilizing blood sugar and insulin reduced overall tension in a way that indirectly affected how I felt.

Taking berberine after meals helped with blood sugar, and with blood sugar more stable, the urge to binge-eat became much less frequent.

📄 Research Note Berberine has shown signals of improvement in insulin resistance, testosterone, FAI, and SHBG in some RCTs and meta-analyses for PCOS. In some studies, effects on metabolic markers were broadly comparable to metformin, while berberine showed advantages in waist-to-hip ratio, lipid profiles, and GI side effects. However, direct effects on mood or aggression have not been validated in human RCTs.
— Wei W et al., Eur J Endocrinol. 2012. | PMID 22019891
— Xie L et al., Evid Based Complement Alternat Med. 2019. | PMID 31915452
— Berberine umbrella review 2025. | PMID 40269802

💡 Want to go deeper?

What I noticed before the blood sugar benefits — my berberine experience and the research, covered in a dedicated post.
→ [Berberine and PCOS — The First Thing I Felt Wasn't Blood Sugar]

My Current Stack

Supplement	What I noticed	How I take it
Inositol	Scalp relief, emotional stability, hair texture change	Cycling
Vitamin D3	Psoriasis/seborrheic dermatitis relief, overall wellbeing	Daily
Berberine	Less aggression, stable blood sugar, improved insulin resistance, weight management	Daily

These are the changes that happened in my body after taking these supplements. PCOS presents differently in everyone — phenotype varies, and so does insulin resistance. I was on the leaner side, and that alone can affect how your body responds.

What You Can Do Right Now

Before you start:

☐ Get bloodwork first — Checking your insulin resistance (HOMA-IR) and vitamin D levels upfront makes it a lot easier to interpret changes later.

☐ Talk to your doctor if you're on other medications — Berberine has blood sugar-lowering effects, so it may need extra caution if you're taking metformin or similar.

☐ Add one at a time — Starting multiple supplements at once makes it hard to know what's actually working.

☐ Track your changes — Note when you started and what symptoms shifted. I didn't keep good records and now some things are blurry.

☐ Curious about the evidence and experience behind each supplement? → The individual posts linked above go into much more detail.

When to See a Doctor Instead

Supplements are not a substitute for medical care.

See a gynecologist or endocrinologist if:

You haven't had a period in 3 months or more

Hirsutism, acne, or hair loss is rapidly getting worse

You're experiencing new fatigue, extreme appetite swings, or skin pigmentation changes

You're planning to get pregnant

Depression or anxiety is intensifying or affecting daily life

If any of these apply, please consult a specialist before reaching for supplements.

Frequently Asked Questions (FAQ)

Q. Can I take all three at the same time?
You can, but I'd recommend adding them one at a time and tracking how each one feels. Starting everything at once makes it hard to tell what's working for your body and what isn't.

Q. Should I start with inositol or berberine?
Both are being researched in the context of PCOS, but which one to try first really depends on your symptom pattern. I started with inositol.

Q. Can these supplements help with lean PCOS?
I was on the leaner side when I first started, and I felt a noticeable difference.

Q. Do I need to check my vitamin D levels before taking it?
Ideally, yes — get a blood test first. If you're planning on taking a higher dose long-term, it's worth discussing with your doctor. I personally take around 3,000–4,000 IU.

Q. Does berberine really change how you feel emotionally?
In my experience, it did. I suspected it was related to androgen changes, but the current evidence doesn't allow me to say that with certainty.

References

[1] Fitz V, Graca S, Mahalingaiah S, et al. "Inositol for Polycystic Ovary Syndrome: A Systematic Review and Meta-analysis to Inform the 2023 Update of the International Evidence-based PCOS Guidelines." J Clin Endocrinol Metab. 2024;109(6):1630-1655. PMID 38163998 · DOI · Full text (PMC)

[1-b] Greff D, Juhász AE, Váncsa S, et al. "Inositol is an effective and safe treatment in polycystic ovary syndrome: a systematic review and meta-analysis of randomized controlled trials." Reprod Biol Endocrinol. 2023;21(1):10. PMID 36703143 · DOI

[2] Zhao JF, Li BX, Zhang Q. "Vitamin D improves levels of hormonal, oxidative stress and inflammatory parameters in polycystic ovary syndrome: a meta-analysis study." Ann Palliat Med. 2021;10(1):169-183. PMID 33545754 · DOI

[3] Wei W, Zhao H, Wang A, et al. "A clinical study on the short-term effect of berberine in comparison to metformin on the metabolic characteristics of women with polycystic ovary syndrome." Eur J Endocrinol. 2012;166(1):99-105. PMID 22019891 · DOI

[3-b] Li MF, Zhou XM, Li XL. "The Effect of Berberine on Polycystic Ovary Syndrome Patients with Insulin Resistance (PCOS-IR): A Meta-Analysis and Systematic Review." Evid Based Complement Alternat Med. 2018;2018:2532935. PMID 30538756 · DOI

[3-c] Xie L, Zhang D, Ma H, et al. "The Effect of Berberine on Reproduction and Metabolism in Women with Polycystic Ovary Syndrome: A Systematic Review and Meta-Analysis of Randomized Control Trials." Evid Based Complement Alternat Med. 2019;2019:7918631. PMID 31915452 · Full text (PMC)

[3-d] Shi L, Wang W, Jing C, et al. "Berberine and health outcomes: an overview of systematic reviews." BMC Complement Med Ther. 2025;25:147. PMID 40269802 · DOI (General berberine review — not PCOS-specific)

[4] Brutocao C, Zaiem F, Alsawas M, et al. "Psychiatric disorders in women with polycystic ovary syndrome: a systematic review and meta-analysis." Endocrine. 2018;62(2):318-325. PMID 30066285 · DOI

[5] Balikci A, Erdem M, Keskin U, et al. "Depression, Anxiety, and Anger in Patients with Polycystic Ovary Syndrome." Noro Psikiyatr Ars. 2014;51(4):328-333. Full text (PMC)