If you've been eating less, moving more, and watching the scale barely shift — you're not imagining it. PCOS disrupts the insulin signal that controls how your body stores fat. That's not a mindset problem. That's metabolic biology.
Metformin ER works at the root of that disruption. It's the most widely prescribed first-line treatment for PCOS — and at Oana, you can access it for $29 a month without a clinic visit.
Up to 70% of women with PCOS have insulin resistance — including those at a perfectly normal weight. When insulin signals are disrupted, your body stores fat differently, produces more androgens, and makes weight management feel impossible no matter what you do.
This isn't about effort. It isn't about willpower. Insulin resistance is a metabolic condition that requires a metabolic solution. Metformin ER is that solution — and it's been the standard of care for PCOS for decades.
Metformin doesn't suppress your appetite or force your body to do something unnatural. It corrects a signal that got disrupted — and lets your metabolism do what it was always supposed to.
Your cells start responding to insulin the way they're supposed to — so your body stops overproducing it.
When insulin drops, your ovaries produce fewer androgens. Less facial hair. Clearer skin. More regular cycles.
Normalised insulin means your body stops getting the signal to store everything. Gradual weight changes become possible again.
The extended-release formula absorbs slowly — which cuts nausea and GI discomfort by up to 50% compared to standard metformin.
I'd spent two years convinced I just wasn't trying hard enough. My doctor kept saying to eat less. I was already barely eating. Starting metformin was the first time in years I felt like my body was actually working with me.
— Oana patient, PCOS + insulin resistance
The first three months I didn't really notice the scale. But my cravings were different. I wasn't white-knuckling through the afternoon anymore. By month four, my jeans started fitting differently.
— Oana patient, metformin ER + lifestyle changes
I'd tried immediate-release metformin before and the nausea was unbearable. I quit after two weeks. The ER version is completely different. I've been on it for six months and I genuinely forget I'm taking medication.
— Oana patient, returning after prior GI issues
of PCOS patients see improved menstrual regularity within 6 months
years of clinical use — one of the most studied medications in the world
reduction in GI side effects with ER formulation vs. immediate release
Answer questions about your PCOS history, symptoms, and goals. Takes about 5 minutes.
A licensed Oana provider evaluates your intake and determines the right treatment for you.
Approved prescriptions are dispensed and delivered monthly. Free shipping, always.
Most patients start with 500mg once daily, taken with dinner. Your provider may gradually increase the dose over the first few weeks. The ER formulation is designed to be taken with food — this improves absorption and further reduces any stomach discomfort.
Mild nausea or stomach discomfort is the most common side effect, and it almost always resolves within the first two to four weeks. The ER formulation was specifically developed to reduce this — and it does. If you tried immediate-release metformin before and stopped because of nausea, this is a meaningfully different experience.
Less common: mild vitamin B12 reduction with long-term use. Your provider will discuss supplementation if relevant.
Most patients notice changes in cravings and energy within the first 4–8 weeks. Menstrual regularity typically improves within 3–6 months. Weight changes are gradual — this is a metabolic treatment, not a crash diet. Meaningful changes usually become visible at the 3–6 month mark when combined with consistent use.
Yes. Metformin is widely prescribed off-label for PCOS and insulin resistance. Your Oana provider will evaluate your health history to confirm it's appropriate for you.
The extended-release (ER) formulation releases the medication slowly over the course of the day, which significantly reduces GI side effects. Clinical data shows up to a 50% reduction in nausea and stomach discomfort compared to immediate-release. Many patients who stopped immediate-release metformin tolerate the ER version with no issues.
Your Oana provider reviews your health history, symptoms, and goals after your intake. If Metformin ER is appropriate, they can prescribe it and support your plan over time.
No. You can cancel anytime. There are no hidden fees and no minimum commitment.
Your Oral Metformin ER prescription, free monthly shipping, and access to your Oana provider for treatment review. No clinic visits. No surprise charges.
Start with Metformin ER at $29/month. A licensed provider reviews your intake and determines whether treatment is appropriate.
Free shipping · Cancel anytime · No hidden fees · Provider-reviewed treatment
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