Every November, something shifts. The days get shorter, the light gets flat, and you start feeling like a different person. Not sad exactly — just heavier. Slower. Less interested in things that usually make you feel like yourself.
If that sounds familiar, you're not imagining it. Seasonal affective disorder — SAD — is a real medical condition, not just "the winter blues." And it affects more older adults than most people realize. Roughly 10 to 20 percent of adults over 60 notice significant mood changes as daylight hours shrink. The trouble is, many dismiss it as a normal part of aging.
It isn't. And there's a lot you can do about it.
Your brain relies on light to regulate mood, sleep, and energy. Specialized cells in your retinas detect daylight and send signals to a cluster of nerves called the suprachiasmatic nucleus — your body's master clock. That clock tells your brain when to release serotonin (the "feel good" chemical) and when to produce melatonin (the sleep hormone).
As you age, several things change that make this system more fragile:
These factors don't just add up — they compound. A 70-year-old who lives alone and doesn't drive in winter faces a very different light environment than a 35-year-old with an office job and an evening social life.
Everyone has days when they feel sluggish or unmotivated during winter. That's normal. SAD is different because it's persistent and it disrupts your life.
Here's what to watch for, specifically:
Important: If you have thoughts of self-harm or feel like life isn't worth living, call the 988 Suicide and Crisis Lifeline (dial 988) or go to your nearest emergency room. Depression is treatable at any age, and you deserve help.
The key difference between SAD and ordinary winter sluggishness is impact. If your mood is affecting your daily routines, your relationships, or your ability to take care of yourself, it's worth talking to your doctor.
Light therapy is the first-line treatment for SAD, and it works well for most people. The idea is simple: you sit near a specially designed bright light for 20 to 30 minutes each morning, and it helps reset your circadian rhythm.
But not all light therapy lamps are equal. Here's what matters when choosing one:
Look for a lamp rated at 10,000 lux. That's the clinical standard. At 10,000 lux, you need about 20 to 30 minutes of exposure. Cheaper lamps rated at 2,500 to 5,000 lux require much longer sessions — up to two hours — which most people won't stick with.
Make sure the lamp blocks UV rays. You want the visible light that affects your mood, not the ultraviolet light that damages your skin and eyes. Every reputable light therapy box filters UV — if a product doesn't mention UV filtering, skip it.
A bigger screen means more even light exposure. Look for a lamp with a surface area of at least 12 by 15 inches. Position it 16 to 24 inches from your face, slightly above eye level, at a 30-degree angle. You don't stare at it — you just have it in your field of vision while you eat breakfast, read, or check email.
Use it within the first hour of waking up. Morning light exposure tells your brain "it's daytime" and helps suppress melatonin production. Using it in the evening can actually make things worse by disrupting your sleep.
Good options include the Verilux HappyLight (compact, affordable), the Carex Day-Light Classic Plus (larger screen, clinical-grade), and the Northern Light Technologies Boxelite (premium build, wide coverage). Prices range from about $30 to $150.
Light therapy works best when combined with other changes. Here's what the research actually supports:
A 20 to 30 minute walk during daylight hours does more for your mood than most supplements. Natural light is 10 to 50 times brighter than typical indoor lighting, even on an overcast day. If it's cold, bundle up. If it's icy, walk in a mall or a well-lit community center. The point is daylight exposure plus movement.
Winter isolation feeds SAD. Make a deliberate effort to see people — even one meaningful conversation per day helps. Join a book club, volunteer at a food bank, take a class at your local senior center. If driving in winter is a concern, ask a friend or family member to help with transportation, or look into community ride services.
SAD makes you want to sleep more, but oversleeping makes SAD worse. Try to wake up at the same time every day, even on weekends. If you're sleeping 10 or 12 hours and still feeling tired, that's a symptom, not a sign you need more rest. The fatigue comes from disrupted circadian rhythms, not actual sleep deprivation.
Exercise is one of the most effective natural mood boosters available. A 2024 meta-analysis published in the British Journal of Sports Medicine found that physical activity is 1.5 times more effective than counseling or medication for reducing symptoms of depression. You don't need to run marathons — walking, swimming, chair exercises, or gentle yoga all count.
The carb cravings that come with SAD are real — your brain is trying to boost serotonin through food. But loading up on refined carbs creates blood sugar spikes and crashes that make you feel worse. Focus on complex carbohydrates (oatmeal, sweet potatoes, whole grains), omega-3 fatty acids (salmon, walnuts, flaxseed), and foods rich in vitamin D (eggs, fortified milk, mushrooms).
If lifestyle changes and light therapy aren't enough, there are medical options that work well:
Vitamin D supplementation. Many seniors are deficient, especially in northern climates. A simple blood test can check your levels. If you're low, your doctor may recommend 1,000 to 2,000 IU daily. Vitamin D alone isn't usually enough to treat SAD, but correcting a deficiency can improve your baseline mood and energy.
Antidepressant medication. SSRIs like sertraline or fluoxetine are commonly prescribed for SAD and work well for many older adults. Your doctor may suggest starting the medication in early fall — before symptoms typically begin — and tapering off in spring. This "preemptive" approach can prevent symptoms entirely.
Cognitive behavioral therapy (CBT). A specific form of CBT developed for SAD — called CBT-SAD — has shown strong results. It helps you identify and change the negative thought patterns that winter triggers. Unlike medication, the benefits tend to last beyond the treatment period.
Dawn simulation. These devices gradually brighten your bedroom over 30 to 60 minutes before your alarm goes off, mimicking a natural sunrise. Research shows they can be nearly as effective as light therapy boxes for mild to moderate SAD. They're especially useful if you struggle to wake up in dark winter mornings.
A note on medication: Older adults metabolize drugs differently than younger people. Any medication decision should involve your doctor, who can check for interactions with your current prescriptions and adjust doses accordingly. Never start or stop antidepressants without medical guidance.
You don't have to wait until next winter to start. Here are three things you can do this week:
SAD is treatable. You don't have to white-knuckle through every winter. The combination of light exposure, regular movement, social connection, and — when needed — medical treatment works for the vast majority of people who try it.
Don't let anyone tell you that feeling low in winter is "just part of getting older." It isn't. It's a medical condition with real solutions.
Disclaimer: This article is for informational and educational purposes only and is not medical advice. Always consult your healthcare provider before starting any new exercise or nutrition program.
