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Have you noticed that your digestive system works more in the colder months?
You’re not imagining it.
Winter can be hard on you, and that doesn’t just apply to your feelings holiday indulgence or stress (although that one Are a large part of it).
There are actual physiological reasons why bloating, constipation and digestive problems tend to peak when temperatures drop.
Let me explain what’s happening and, more importantly, what you can do about it.
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Your digestive system doesn’t work in a vacuum. It responds to everything that happens around you and in your body.
And winter creates the perfect storm for digestive problems.
Research shows that intestinal motility (the muscle contractions that move food through your digestive tract) naturally slows down during the colder months. [source]
This is not just anecdotal. Studies have documented seasonal variations in gastrointestinal function, with winter showing the slowest transit times. [source]
Think about it: When you’re cold, your body prioritizes keeping your core warm. Blood flow is diverted away from your digestive system to maintain body temperature. Less blood flow means less efficient digestion.
[I notice this every single winter. My gut just… slows down. Even when I’m doing everything “right.” p.s. I live in Minnesota, and have I ever told you how much I loathe the winter????]
Why [S]Low mobility is more important than you think
Slow mobility isn’t just about occasional constipation (although that’s certainly part of it).
When food moves through your intestines too slowly, several problems arise:
1]Bacterial overgrowth becomes more likely.
Food that sits in your small intestine longer than necessary creates an environment where bacteria can ferment it, leading to gas, bloating and SIBO symptoms.
2]Nutrient absorption suffers.
Your body has optimal windows for nutrient extraction. If the transit time is not available, you may not absorb what you need. [source]
And remember this? “90% of your nutrients are absorbed in the small intestine.”
3]The reabsorption of toxins increases.
Your body packages waste and toxins for elimination. But if stool sits in your colon for too long, some of those toxins can be reabsorbed into your bloodstream. [source]
This is one reason why people with existing intestinal problems often feel significantly worse in the winter months.
The Stress Connection You Can’t Ignore
Let’s talk about the elephant in the room: winter stress.
The holidays. Shorter days. Less sunlight. Seasonal affective disorder. Financial pressure. Family dynamics.
All this ends up directly in your intestine via the gut-brain axis.
When you are stressed, your body releases cortisol and activates your sympathetic nervous system (fight or flight mode). This literally shuts down digestive function. Your body thinks you’re running from a bear and not trying to digest breakfast.
DIGESTION IS NOT THE PRIORITY.
Chronic stress also:
- Reduces stomach acid production
- Reduces the secretion of digestive enzymes
- Changes the composition of the intestinal microbiome
- Increases intestinal permeability
Winter makes this worse because you’re likely to get less:
- Natural sunlight (which affects mood and gut bacteria)
- Physical movement (which stimulates mobility)
- Time outdoors (which exposes you to beneficial microbes from the environment)
- Quality sleep (which your intestines need to recover) [Hint: Use my Optimal Nighttime Sleep Routine for best results.]
Other winter factors that affect your intestines
1]Dehydration happens more easily.
In cold weather you feel less thirsty, but your body still needs the same amount of water.
Dehydration directly contributes to constipation and slow motility.
2]Dietary changes are creeping in.
Winter means more comfort food, less fresh vegetables and more cooked/heavy meals.
This often translates to less fiber and more processed ingredients.
3]Movement decreases.
In cold weather you feel like crawling under a blanket and not going for a walk.
But physical activity directly stimulates intestinal motility. [source]
4]Vitamin D plummets.
Reduced sun exposure means lower vitamin D levelswhich affects intestinal barrier function and immune regulation in your digestive tract.
What actually helps (besides ‘drink more water’)
This is what I do and recommend to support intestinal function during the winter months:
1]Prioritize gentle exercise daily
You don’t need intense exercise. Even a 15-20 minute walk stimulates the… migrating motor complex (MMC), which sweeps food and bacteria through your intestines.
I aim for a walk between meals, even if it’s just on my walking path at home.
But I also stick to my workout routine, viz Lifting at the gym 3-4 times a week. I swear by this.
2]Support strategic supplements
Magnesium glycinate before going to sleep supports both mobility and the stress response. I drink too Sleep breakthrough with my kids every night before bed for the ultimate boost.
Digestive enzymes with meals help compensate for the reduced enzyme production that occurs with stress and cold weather.
Ginger or peppermint tea supports mobility and reduces bloating during the day. Both have solid research supporting their digestive benefits.
[And, of COURSE, Tummy Soothe specifically for the immune system during cold and flu season.]
3]Warm your digestive system
Traditional Chinese medicine has been talking about this for centuries, and there is merit in it.
Start your day with warm lemon water. Eat hot, cooked food. Add warming spices such as ginger, cinnamon and turmeric. Avoid ice-cold drinks.
This isn’t woo-woo. Temperature affects the activity of digestive enzymes and blood flow to your gastrointestinal tract. [source]
4]Manage stress proactively
Don’t wait until you’re overwhelmed.
Daily practices that help:
- 10 minutes of breathwork or meditation
- Regular sleep/wake times (even on weekends)
- Say no to obligations that exhaust you
- Red light therapy in the morning
Your intestines literally cannot function optimally if your nervous system is disrupted.
By the way, I have written extensively about stress and the intestines on this website. Start HERE for more ways to manage it.
5]Adjust your fiber strategy
Winter vegetables tend to be tougher, denser and higher in fiber (think root vegetables, cruciferous vegetables). These are great, but require more digestive power.
If your intestines are already sluggish:
- Cook vegetables well (raw is not always better)
- Add digestive support fats (ghee, olive oil)
- Don’t force big salads if they make you feel bloated
- Consider increasing temporarily soluble fiber (such as chia seeds or cooked oats)
6]Actually stay hydrated
Set reminders. Add electrolytes. Drink herbal tea. Keep a water bottle visible.
Aim for half your body weight in ounces as a baseline. More if you are active or in heated indoor environments (which are dehydrating).
I have THIS LARQ water bottle. It has a self-cleaning filter and keeps track of how much water I drink every day. I’m obsessed.
7]Intentionally support your microbiome
Your gut bacteria also change seasonally. [source]
Winter is a good time to:
[I do all of these, and have resources upon resources for how to throughout this website.]
When to seek additional support
If you do all this and still struggle with:
- Severe constipation (fewer than 3 bowel movements per week)
- Debilitating bloating
- Unintentional weight changes
- Blood in the stool
- Constant nausea
Please work with a functional medicine doctor or gastroenterologist.
Sometimes winter brings to light underlying issues that need professional attention, such as SIBO, IMO, or motility disorders that require specific protocols.
The bottom line
If your intestinal symptoms get worse in winter, this is not a personal shortcoming.
It is your digestive system that responds to very real environmental and physiological changes.
The good news? You have a lot more control than you might think.
Small, consistent adjustments to support mobility, manage stress and maintain hydration can make a significant difference in how you feel during the colder months.
You don’t have to be perfect. You just have to be intentional.
If you liked this article, you might also like:
- 25+ gut-friendly fall and winter recipes
- Gut Health Routine (What’s in My Personal Toolbox?)
- Why does my stomach hurt [and How to Reset Your Gut]
XXX,
S.K.H
Disclaimer: Some links in this post are affiliate links, which means I may earn a small commission if you make a purchase through them, at no additional cost to you. I only recommend products that I personally use and believe in.
💃ʜᴇᴀʟ ʏᴏᴜʀ ɢᴜᴛ. ʜᴇᴀʟ ʏᴏᴜʀ ʟɪfe.
🫶🏻 Founder gutbyome.com
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