Five Gut Health Mistakes You Don't Need to Make

Common missteps to avoid when working to improve your gut health after 40 and the simple actions you can take instead

If you've been paying attention to your gut health and still not feeling better, it's probably not a lack of effort. Women over 40 are one of the most health-conscious, research-driven groups out there, but a lot of the popular gut health advice was never designed with your body in mind. As you may already know from following yet another set of tips and tricks: the harder you try, the worse you feel.

This blog covers some of the most common mistakes that I see women make. The sooner you have them on your radar, the sooner you can avoid them altogether.

Mistake #1: Assuming Constipation Is Just Part of Getting Older

This one is so common it's almost accepted as fact. Research shows that women are more than twice as likely as men to experience constipation, and prevalence increases significantly after 50. While that might be true, it doesn't mean it's inevitable. Chronic constipation is not something you simply have to live with, and accepting it without investigating the cause means missing real, treatable drivers: low thyroid function, magnesium deficiency, insufficient fiber or hydration, a sedentary lifestyle, or dysbiosis in the microbiome.

What to do instead: Treat constipation as information and start with the basics: are you drinking enough water, moving your body, and getting at least 25g of fiber every day? If those are in order and the problem persists, consider adding a nightly dose of magnesium citrate to your evening supplement routine. Magnesium citrate specifically draws water into the intestines to soften stool and stimulate movement. Many women in midlife notice a meaningful difference within just a few days of consistent use at 200-300mg a night.

You may also want to work with a practitioner to rule out thyroid issues. An underactive thyroid slows every system in the body, including digestion, and is significantly more common in women over 40.

Mistake #2: Going Too Hard on Fiber Too Fast

Fiber is essential for gut health, but dramatically increasing your intake overnight is a shock to the system. If your gut microbiome isn't accustomed to high fiber, the bacteria that ferment it produce excess gas as a byproduct and this leads to the oh so uncomfortable bloating you were probably trying to fix. What most people don't realize is that different types of fiber feed different bacteria — soluble fiber, found in foods like oats, apples, and legumes, dissolves in water and forms a gel that slows digestion, while insoluble fiber, found in wheat bran and leafy greens, adds bulk and speeds things up. If your microbiome is already imbalanced, throwing large amounts of either type at it too quickly can aggravate symptoms rather than ease them. Timing matters too. Many women increase fiber in response to bloating or constipation, not knowing that their symptoms may temporarily worsen before they improve as the microbiome adjusts.

What to do instead: If you’re currently eating fewer than the recommended 25 g of fiber a day, increase your intake gradually rather than overhauling your diet overnight. A practical approach is to add one new high-fiber food and gradually increase the quantity over four to five days, so that your gut bacteria have time to adjust. As you increase fiber, be sure to increase water intake alongside it. When you eat too much fiber without adequate hydration, it can make constipation worse. Aim for variety over volume: research suggests that eating 30 different plant foods per week supports microbiome diversity more effectively than eating large quantities of the same few sources. That 30 might sound like a lot, but it includes herbs, spices, nuts, seeds (and even tea!).

Mistake #3: Underestimating the Impact of Alcohol on Gut Health

Wine o’clock has become a normalized part of many women's routines, and the messaging around red wine and resveratrol has made it easy to feel like moderate drinking is even beneficial. Most of us don’t even associate drinking with gut health, and instead consider the damage it might be doing to the liver (if we even stop to think about our bodies at all). But alcohol is actually one of the most disruptive substances for the gut lining since it increases intestinal permeability (commonly called "leaky gut"), depletes beneficial bacteria, and contributes to inflammation.

After 40, these effects are amplified. Estrogen decline slows alcohol metabolism, meaning it stays in your system longer and does more damage per drink than it did in your 30s. At the same time, the liver is under greater demand during perimenopause since it’s responsible for processing both alcohol and excess estrogen. When alcohol is added to that load, it competes with estrogen metabolism, which can worsen hormonal imbalance at exactly the time your body is already struggling to maintain it.

There's also the gut-liver axis to consider: alcohol that passes through a compromised gut lining reaches the liver in higher concentrations, triggering inflammation that then feeds back into the gut — a cycle that becomes harder to break the longer it continues.

What to do instead: You don't have to eliminate alcohol entirely, but it's worth being honest about frequency and quantity. If you're actively working to heal your gut, consider a 30-day alcohol-free period to give your gut lining a genuine chance to repair. When you do drink, prioritize hydration, avoid drinking on an empty stomach, and support your liver with foods like leafy greens, beets, and adequate protein.

Mistake #4: Ignoring the Gut-Hormone Connection

If you’re a woman in midlife, you’ve undoubtedly heard of the hormone estrogen (and maybe its sidekick progesterone). While estrogen also plays a large role in gut health after 40, there are two even more foundational hormones that are running the show. Cortisol, your primary stress hormone, and insulin, which regulates blood sugar, both have a profound impact on the health of your gut.

Chronically elevated cortisol, the kind that comes not from a single stressful event but from the low-grade, relentless stress that many women in midlife carry, directly damages the gut lining, increases intestinal permeability, and suppresses the diversity of the microbiome. It also disrupts the gut-brain axis, the bidirectional communication network between your gut and your brain, which governs everything from digestion speed to how much serotonin your gut produces. Did you know that roughly 90% of the body's serotonin is made in the gut? Chronic stress disrupts that production, affecting not just digestion but mood, sleep, and appetite regulation.

Insulin resistance tells a similar story. As estrogen declines after 40, cells become less sensitive to insulin, and blood sugar regulation becomes less efficient. Blood sugar spikes (followed by crashes) create an inflammatory environment in the gut that feeds harmful bacteria, depletes beneficial ones, and contributes to the kind of dysbiosis that no probiotic can fully correct. The bloating, irregular digestion, and food sensitivities that many women develop in midlife are often rooted here.

What to do instead: Address cortisol by treating stress management as a non-negotiable part of your gut health protocol . Instead of constantly taking on more, be honest about whether your lifestyle is giving your nervous system a chance to recover and return to baseline.

For insulin, focus on blood sugar stability: eat protein, fiber, and healthy fat at every meal. Avoid eating carbohydrates alone and limit the ultra-processed foods (or avoid them entirely). It's also worth paying attention to the order in which you eat. When you start off your meal with protein and finish with carbohydrates, you can significantly blunt the blood sugar spike.

Mistake #5: Focusing Entirely on What You Eat and Ignoring How You Eat

The gut is big on context. How it reacts to food can be very different depending on the conditions in which you find yourself eating. If you’re always grabbing something on the go, finishing meals in under ten minutes, or sitting down to eat while simultaneously managing work, family, and an ever growing mental load, then your body is trying to digest food while the sympathetic nervous system is fully activated. In that state, digestion is not a priority. Blood is redirected away from the digestive organs toward the muscles and brain, stomach acid production drops, motility slows, and the enzymes needed to break down food are released in lower quantities. You can eat the most nutrient-dense meal imaginable and absorb a fraction of what it has to offer if your nervous system isn't in the right state to receive it.

Eating quickly compounds the problem further since digestion actually begins in the mouth. Chewing breaks food down and mixes it with salivary enzymes that start the process of carbohydrate digestion. When you’re scarfing something down and chewing less than is optimal, you end up sending large, poorly broken-down pieces of food into the digestive tract. This means more work for the stomach and small intestine and more bloating, gas, and discomfort for you.

What to do instead: Before you eat, take 3–5 slow, deliberate breaths to begin shifting your nervous system into parasympathetic mode. This will help to increase stomach acid production and prime the digestive organs for the work ahead. Sit down, put your phone away, and aim to chew each bite 20–30 times before swallowing. If a mindful meal isn't realistic every day, start with your first meal of the day and build the habit from there.

The Bottom Line

Gut health after 40 is about doing the right things for where your body is now. If you’re starting to feel overwhelmed by everything you need to change, remember that small, targeted adjustments made consistently will always outperform aggressive overhauls.

If you're ready to stop guessing and start getting real results, I would love to help. Check out our services or book a complimentary Whole Belly Conversation so we can get you on the right track.