The short answer: The "winter blahs" — low mood, fatigue, and feeling overwhelmed as days shorten — usually trace back to five root causes: hormonal imbalances, vitamin and mineral deficiencies, toxic overload, too little movement and sunlight, and poor gut health. You don't have to fix all five. Improving any one of them brings real relief, and they reinforce each other.
Before we go further, I need to be honest with you: some of these areas need professional guidance to fully resolve. But even so — when you address any one of them, you can expect improvement. Here's where to start.
1. Could my hormones be behind my low mood?
Very possibly. And I'm going to say this loudly for the people in the back: balancing hormones rarely looks like taking a bunch of bioidenticals. A few people can benefit from that approach if it's done properly — but properly is the key word. For most people, a gentle, thorough detoxification does more for hormone balance than anything else, and giving real attention to the adrenals is the key to steadying the whole steroid hormone family. This is the area where guidance matters most — but don't lose hope: working on the other four areas below helps your hormones too.
2. Which nutrient deficiencies cause the winter blahs?
Two show up constantly. First, vitamin D — test rather than guess, and aim for levels between 40 and 80. Cod liver oil is a naturally balanced source of vitamins A and D, though true deficiency may need supplementation. Second, magnesium — most of the population runs low, and it plays a huge role in balancing cortisol and blood sugar, easing constipation, and helping sleep. Quality matters: at the very least avoid magnesium oxide, and look for chelated or lactate forms. A favorite in our office is a naturally concentrated magnesium-potassium combination made from organic Swiss chard and buckwheat.
3. How do everyday toxins affect mood and energy?
Toxins and endocrine disruptors add a constant background burden that shows up as poor sleep, inflammation, and mood changes. You can't escape them, but you can lower the load: store and reheat food in glass instead of plastic, swap scented plug-ins for oil diffusers or clean-burning candles, and choose cleaner skin care and makeup (EWG.org is a great checking tool). Support your body's own detox pathways with plenty of filtered water, fiber, and dark leafy greens — spinach, kale, parsley, broccoli, and Brussels sprouts top the list.
4. How much exercise and sunlight do I actually need?
Think movement, not punishment. A daily walk — ideally outside, in daylight — does more for winter mood than a sporadic intense workout, and too much exercise stresses the adrenals just like too little. Morning light exposure is free medicine for your sleep-wake rhythm.
5. What does my gut have to do with my mood?
A great deal — much of your neurotransmitter production and nutrient absorption depends on it. Prolonged stress degrades gut health, which reduces absorption of exactly the nutrients your mood depends on: magnesium, zinc, B vitamins, vitamin D. If digestion is a struggle, that's a signal worth taking seriously, not pushing through. (For a deeper look, read What's the Gut Got to Do with It?)
Frequently asked questions
Is this the same as seasonal affective disorder (SAD)?
The winter blahs and clinically diagnosed SAD can share triggers — less light, less movement, nutrient strain. If your low mood is severe or persistent, please involve your healthcare provider; natural support works alongside professional care, not instead of it.
What single step helps fastest?
For most people: a daily outdoor walk plus testing vitamin D. Both are simple, inexpensive, and address two root causes at once.
When should I get help instead of going it alone?
If you've worked on the basics and still feel flat, hormones or detox pathways may need a professional look. A "See If We Fit" consult with Dr. Annette is an easy, no-pressure place to start.
Dr. Annette Kutz Schippel has practiced functional endocrinology for more than two decades and has trained thousands of practitioners worldwide. Meet Dr. Annette →
This article is educational and is not medical advice or a substitute for care from your healthcare provider. Nutritional and herbal programs support normal body physiology; they are not intended as primary therapy for any disease.