Can What You Eat Really Affect Your Hormones & Menstrual Cycle? My Personal Experience With PCOS?
For more than a decade, my menstrual cycle was like clockwork. Every 26–28 days, I knew exactly when my period would arrive. So when my period was suddenly 12 DAYS LATE, I knew something was different. More importantly, I knew what had changed in the weeks leading up to it!
Let me take you back to when I was 26 years old.
After coming off the birth control pill, I didn't have a period for TWO YEARS! I was diagnosed with PCOS, told I was infertile & that I'd never be able to have children. Five different doctors told me there was nothing I could do and that this was simply a lifelong condition I had to live with.
After two years of searching for answers, a friend recommended I make some changes to my diet. At the time, I was a fit personal trainer who exercised regularly and genuinely believed I was eating well. Turns out, I wasn't eating in a way that supported my hormones!
I decided to give her recommendations a try and transitioned to a low-carb, Paleo-style diet, focusing on whole foods, quality protein, healthy fats & plenty of vegetables.
Guess what happened?
Just THREE MONTHS later, my period returned! It took another two years of consistently addressing all my Pillars of Health, including nutrition, exercise, stress, sleep & supplements, before my periods regulated to every 28 days.
From that point forward, my cycles were like clockwork for more than a decade! I knew exactly when to expect my period, and I could usually identify what might cause it to shift by a few days, such as travel or changes to my supplement routine.
After moving back to the US and navigating some particularly stressful circumstances, my cycles settled into a slightly different but still predictable pattern of 26–28 days.
Then came July! I spent time with family I hadn't seen in years. It was wonderful, but my eating habits were VERY different from my usual routine. I ate more gluten in eight days than I had in the previous 12 years! I enjoyed baked goods, some gluten-free and others not, along with foods containing regular sugar rather than the monk fruit or stevia-based sweeteners I'd used for years. My meals were less consistent, I ate fewer vegetables, consumed more carbohydrates overall & wasn't getting my usual amount of protein throughout the day.
The result? My period was 12 DAYS LATE!
Given my history with PCOS and the significant role nutrition had played in restoring my menstrual cycle all those years earlier, I immediately connected this change with how differently I'd been eating.
Once I returned to my usual eating habits, my cycle returned to its predictable 26–28-day rhythm over the following three months.
For me, this was another powerful reminder of just how closely connected nutrition and hormonal health are.
But WHY can food have such a significant influence on our hormones?
One important connection, particularly for women with PCOS, is insulin resistance.
Insulin is a hormone that helps move glucose (sugar) from your bloodstream into your cells for energy. When your cells don't respond to insulin effectively, your body may produce MORE insulin to compensate.
Here's where things get interesting. Elevated insulin levels can stimulate the ovaries to produce more androgens, including testosterone, which may interfere with ovulation and contribute to irregular menstrual cycles.
So what starts as a blood sugar issue can also become a reproductive hormone issue!
This is one of the reasons nutrition can play such an important role in managing PCOS. Eating adequate protein, healthy fats, fiber-rich vegetables & appropriate amounts of carbohydrates can help support blood sugar regulation and overall hormonal health.
Of course, there's no single diet that works for everyone. Our bodies have different needs, and hormones are also influenced by stress, sleep, exercise, energy intake & other aspects of our health.
This is why I'm such a big believer in addressing ALL our Pillars of Health rather than looking at symptoms in isolation.
Ann Wigmore once said, “The food you eat can be either the safest and most powerful form of medicine or the slowest form of poison.”
I LOVE this quote because it reminds us that food is so much more than calories. It's nourishment, information & one of the most powerful tools we have to influence our health.
This doesn't mean one indulgent meal will undo all your progress. What matters most is what we do CONSISTENTLY over time. However, I do believe we need to stop underestimating the influence our daily food choices can have on our physical, mental & emotional well-being.
You cannot consistently undernourish your body and expect it to function at its best.
If you're struggling with irregular periods, PCOS, insulin resistance, stubborn weight gain or other hormone-related symptoms, please don't assume that eating less and exercising more is always the answer.
Sometimes, the first step is learning how to nourish your body in a way that supports its needs and understanding what may be contributing to the symptoms you're experiencing.
Your symptoms are signals worth paying attention to, and you don't have to figure everything out on your own.
As a Functional Medicine Coach, Nutritionist & Traditional Naturopath, I'm passionate about helping people understand their bodies, identify potential contributors to their health challenges & make meaningful changes to their nutrition and lifestyle.
Your body is always responding to the signals you give it. Let's make sure you're giving it the support it needs!
Jen Knutson
Functional Medicine Coach, Nutritionist & Traditional Naturopath
