PCOS Supplements: How to Tell If One Is Actually Worth It

By Dr. Mélanie DesChâtelets, ND. Licensed naturopathic doctor and founder of PMOS Health Collective.

The market for PCOS supplements is enormous, and most of it is sold with five-star reviews, a “science-backed” badge, and a sleek list of ingredients. So before you spend money on the next one, here’s the exact six-step filter I use to tell a real bet from good marketing. It works on any supplement, not just the one in your cart.

One quick note. This is education, not medical advice, and I’m not your naturopathic doctor. Read it, take notes, then bring it to your own care team.

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The wrong question vs the right one

The smart question isn’t “could this help?” It’s “is this where I place my first bet?” Your time, money, and energy are finite, so think of it like a horse race: when you can see all the options and how deep the research is behind each, that’s when you can bet on the fastest horse. These six filters are how I read the field, and how you can read any product before you buy.

Filter 1: a long reference list isn’t proof

A wall of PubMed links on a website doesn’t tell you how confident we can be in the outcome. The questions that matter: Was it studied in humans, or in a petri dish? In people with PMOS (formerly PCOS) or a metabolic history like yours? Different research types carry different confidence. Sometimes we extrapolate from thin evidence, which isn’t always wrong, but it’s a weaker bet when other options were tested in real humans with measured, hard outcomes.

Filter 2: they don’t all work the same way

Some strategies block the absorption of glucose. Others improve how your body actually uses it. On a glucose monitor they can look similar, but long term they point to very different physiology. I’ll take improved physiology over a quick patch that helps just one meal, every time.

Filter 3: what it should actually change

Mechanisms give us a theory. What I care about are hard outcomes in real humans. “This lowers post-meal glucose” is fine. But if another option shows it improves hemoglobin A1C or an insulin-resistance measure over 90 days, that’s the one I’d bet on first. A change on your bloodwork over months beats a blip on a monitor after a single meal.

Filter 4: the croissant context

Here’s a research trick: if you want the biggest possible improvement, you test it in the situation most likely to produce one. One sleek site claimed a “40% blood sugar reduction,” but what did the person eat? A croissant, a highly processed carb we already know spikes blood sugar a lot. What that number doesn’t tell you is how much it would do for a balanced meal, and whether that would even be meaningful. That gap is exactly what to weigh before you prioritize something.

Filter 5: the permission slip

This one is behavioral, and it’s the one most people miss. Some products quietly become psychological permission slips. If a supplement makes the croissant feel less harmful, that food might show up more often, or you decide you don’t need to change it at all. That’s not a moral failure, it’s human nature. But what you do most often matters, and even with the spike blunted, you may have skipped the chance to choose something with more fiber, more whole, less processed. That’s a real opportunity cost.

Filter 6: foundations are leverage

The supplement that prompted this had some human data, so I’m not saying it does nothing. I’m saying that out of everything you could choose, it wouldn’t make my top five to ten. Around 80% of Canadians aren’t meeting their fiber goals, and that one shift alone touches blood sugar, insulin, inflammation, and cardiovascular risk. Most people with PMOS don’t need more novel information or more complex protocols, they need support being consistent with the foundation. When you do layer supplements or medication on top, start with the ones that influence several systems at once and have the most human studies behind them. So this was never about good versus bad. It’s about sequence: is this really where you place your first bet?

Watch the full video: PCOS Blood Sugar Supplements: Not All Created Equal, and subscribe to my YouTube channel.

This article is educational, not medical advice or a diagnosis. If something here resonates, bring it to your healthcare team, who can look at it through the lens of your individual health.

Main references

1. Teede HJ, et al. Recommendations from the 2023 International Evidence-based Guideline for the Assessment and Management of Polycystic Ovary Syndrome. J Clin Endocrinol Metab. 2023. PubMed