A Functional and Evidence-Based Approach to PCOS
Polycystic ovary syndrome (PCOS) is one of the most common endocrine disorders I see in clinical practice, and also one of the most misunderstood. Too often, it is reduced to “irregular periods and ovarian cysts,” when in reality, PCOS is a complex metabolic and hormonal condition that affects insulin signaling, androgen balance, ovulation, and long-term cardiometabolic health.
As a naturopathic medical doctor and registered dietitian, I approach PCOS through both a diagnostic and root-cause lens, using evidence-based tools to assess, diagnose, and treat the condition early and effectively.
How PCOS is Diagnosed
PCOS is most commonly diagnosed using the Rotterdam criteria, which require two of the following three features:
- Irregular or absent ovulation (oligo- or anovulation)
- Clinical or biochemical signs of hyperandrogenism
- Polycystic ovarian morphology on ultrasound
Importantly, PCOS is a diagnosis of exclusion. Conditions such as thyroid dysfunction, hyperprolactinemia, and non-classic congenital adrenal hyperplasia must be ruled out.
Signs and Symptoms
PCOS can present differently in each patient, but common clinical features include:
- Irregular or absent menstrual cycles
- Acne, oily skin, or hirsutism (facial/body hair growth)
- Hair thinning or androgenic alopecia
- Weight gain or difficulty losing weight
- Insulin resistance (often presenting as fatigue, cravings, or central adiposity)
- Infertility or difficulty ovulating
Many patients also report mood changes, brain fog, and low energy, which are often tied to underlying metabolic dysfunction.
Key Lab Markers I Evaluate
A comprehensive evaluation goes far beyond a basic hormone panel. I typically assess:
Hormones
- Total and free testosterone
- DHEA-S
- LH and FSH (often with an elevated LH:FSH ratio)
- Estradiol and progesterone (to assess ovulation)
Metabolic markers
- Fasting glucose and fasting insulin
- Hemoglobin A1c
- Lipid panel (including triglycerides and HDL)
Additional testing (as indicated)
- TSH and free T4 (thyroid function)
- Prolactin
- 17-hydroxyprogesterone (to rule out other conditions)
In many cases, insulin resistance is present even when glucose levels are “normal,” making fasting insulin a particularly valuable marker.
Potential Complications
Without proper management, PCOS can increase the risk of:
- Type 2 diabetes and insulin resistance
- Dyslipidemia and cardiovascular disease
- Endometrial hyperplasia (due to unopposed estrogen)
- Infertility
- Nonalcoholic fatty liver disease
This is why early identification and treatment are critical.
Evidence-Based Treatment Strategies
1. Nutrition and Lifestyle (Foundation of Care)
The cornerstone of PCOS treatment is improving insulin sensitivity.
- Emphasize protein, fiber, and healthy fats
- Reduce refined carbohydrates and added sugars
- Incorporate regular resistance training and movement
- Support sleep and circadian rhythm
Even modest improvements in insulin sensitivity can restore ovulation and reduce androgen levels.
2. Medications (When Appropriate)
Evidence-based pharmacologic options include:
- Metformin – improves insulin sensitivity and may help regulate cycles
- Combined oral contraceptives – regulate cycles and reduce androgen symptoms
- Spironolactone – reduces androgen-related symptoms such as acne and hirsutism
- Letrozole – first-line ovulation induction for infertility in PCOS
Medication choice depends on the patient’s goals, whether that is symptom control, metabolic health, or fertility.
3. Targeted Nutrients and Botanicals
In my practice, I often incorporate evidence-supported nutraceuticals alongside conventional care:
- Myo-inositol and D-chiro-inositol – improve insulin signaling and ovulatory function
- N-acetylcysteine (NAC) – supports insulin sensitivity and ovarian function
- Omega-3 fatty acids – reduce inflammation and support metabolic health
Botanical support may include:
- Spearmint – shown to reduce androgen levels in some studies
- Cinnamon – may improve insulin sensitivity
- Berberine – has evidence comparable to metformin for glucose regulation in some populations
These interventions are not replacements for medical care but can be powerful adjuncts when used appropriately.
A Clinical Perspective
PCOS is not just a reproductive condition. It is a metabolic and hormonal pattern that requires a comprehensive, individualized approach. The goal is not simply to regulate a cycle or suppress symptoms, but to restore underlying balance, improve long-term health outcomes, and support patients in feeling well in their bodies again.
When we address insulin resistance, inflammation, and hormonal signaling together, we often see meaningful improvements not only in labs, but in energy, mood, and overall quality of life.