Seasonal Affective Disorder (SAD): natural remedies and the evidence behind them
Seasonal Affective Disorder (SAD) is a pattern of depression that follows the seasons, most often bringing low mood, low energy, and withdrawal during the…
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If your slump eases as the days get longer, bright light therapy mimics that longer daylight: morning light exposure to help reset your body clock and lift oversleeping and sluggishness.
Bright morning light is a first-line approach for winter SAD, and a meta-analysis of randomized trials found blue-enriched light therapy improved winter depression symptoms. Many people notice a lift within the first couple of weeks.
Dose or use Typically about 30 minutes of bright light-box exposure in the morning; follow the device's guidance.
Key study Meta-Analysis (2022, PMID 35522196): Blue-Light Therapy for Seasonal and Non-Seasonal Depression: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Pooled nine RCTs (seven in seasonal depression, n=347) and found blue-enriched light therapy improved depression symptoms versus control.
EvidenceSupported by controlled trials · Centuries of traditional useTime to resultsTypically 1-2 weeksTraditional useLong-standing traditional staple
Caution: Can cause eye strain, headache, or overstimulation. If you have an eye condition or bipolar disorder, check with a doctor before starting.
Evidence grade not assigned · Traditional use recognised
Low tryptophan can mean low serotonin
Why it may be relevant
When winter brings a flat, low mood, it can reflect low serotonin, and tryptophan is the amino acid your body needs to make it.
The library links low tryptophan to irritability, anxiety, and depression, so addressing it targets the low-serotonin side of seasonal mood dips.
Dose or use Support through protein-rich foods or supplementation; discuss testing and dosing with your provider.
Key study The library guide links low tryptophan to irritability, anxiety, and depression through reduced serotonin; this is a mechanistic association, not a SAD-specific trial.
EvidenceNot yet assessed · We have not reviewed the literature for this oneTime to resultsTypically a few weeksTraditional useRecognised traditional use
Caution: If you take antidepressants or other serotonergic medicines, raising tryptophan should be done only with medical advice.
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Nutrient gap worth checking
Vitamin D Deficiency
Evidence grade not assigned · Traditional use recognised
Low winter sunlight can drop vitamin D
Why it may be relevant
The winter slump often tracks with less sunlight, and less sun means less vitamin D, which the library links to low mood in the darker months.
Getting your vitamin D level checked is a simple step; low mood and fatigue can be associated with low vitamin D, especially in winter.
Dose or use Ask your doctor for a blood test, then supplement to correct a confirmed deficiency under guidance.
Key study The library guide notes low mood or depression can be associated with low vitamin D, particularly in the winter months; this is an association, not proof of cause.
EvidenceNot yet assessed · We have not reviewed the literature for this oneTime to resultsTypically several weeks after correcting a deficiencyTraditional useRecognised traditional use
Caution: More is not better; high-dose vitamin D can be harmful. Supplement to correct a tested deficiency, not blindly.
What kind of help feels right for you this winter?
I'd rather build simple daily habits at home - morning light, acupressure, or mood-lifting music
If your slump eases as the days get longer, bright light therapy mimics that longer daylight: morning light exposure to help reset your body clock and lift oversleeping and sluggishness.
Bright morning light is a first-line approach for winter SAD, and a meta-analysis of randomized trials found blue-enriched light therapy improved winter depression symptoms. Many people notice a lift within the first couple of weeks.
Dose or use Typically about 30 minutes of bright light-box exposure in the morning; follow the device's guidance.
Key study Meta-Analysis (2022, PMID 35522196): Blue-Light Therapy for Seasonal and Non-Seasonal Depression: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Pooled nine RCTs (seven in seasonal depression, n=347) and found blue-enriched light therapy improved depression symptoms versus control.
EvidenceSupported by controlled trials · Centuries of traditional useTime to resultsTypically 1-2 weeksTraditional useLong-standing traditional staple
Caution: Can cause eye strain, headache, or overstimulation. If you have an eye condition or bipolar disorder, check with a doctor before starting.
Evidence grade not assigned · Traditional use long-standing
Crown point traditionally used to lift mood
Why it may be relevant
When SAD feels like low energy and a flat mood, DU20 (Baihui), at the crown of the head, is the classic point traditionally used to lift energy and mood.
In Traditional Chinese Medicine, this point is used to uplift energy, ease mild low mood, and clear mental fatigue and brain fog.
Dose or use Apply gentle, steady pressure to the crown of the head for 1-2 minutes, breathing slowly.
Key study Traditionally used in Chinese medicine to uplift mood and relieve mental fatigue; this specific use has not been confirmed in a controlled clinical trial held in our library.
EvidenceCenturies of traditional use · Human evidence not yet assessedTime to resultsVaries; often used as an ongoing daily practiceTraditional useLong-standing traditional staple
Caution: A gentle self-care practice, not a treatment for clinical depression; seek professional care for persistent or severe symptoms.
Evidence grade not assigned · Traditional use long-standing
Guided music to lift a flat winter mood
Why it may be relevant
When SAD sits as a flat, heavy mood, music therapy uses guided listening and music-making with a trained therapist to gently lift mood and energy.
The library notes music therapy improves mood and reduces symptoms of depression. It is offered on that basis rather than a SAD-specific controlled trial held for this item in our library.
Dose or use Sessions with a credentialed music therapist, or simple daily guided listening at home.
Key study Music therapy is used to support mood and ease depressive symptoms; this specific SAD use is not tied to a controlled trial held for this item in our library.
EvidenceCenturies of traditional use · Human evidence not yet assessedTime to resultsTypically 3-6 weeksTraditional useLong-standing traditional staple
Caution: Generally low-risk; choose a credentialed therapist for structured work and skip tracks that stir up distressing memories.
Targets seasonal negative thought patterns directly
Why it may be relevant
If SAD is showing up most as stuck or hopeless thinking, CBT works by identifying and reshaping the seasonal beliefs that fuel winter depression.
Supported by clinical research, CBT adapted for SAD has shown a durability advantage — meaning the mindset shifts it builds may help protect against SAD returning in future winters.
Dose or use Typically 8–12 structured sessions with a trained therapist; SAD-specific CBT protocols are available.
Key study RCT (2023, PMID 37330257): Change in Seasonal Beliefs Mediates the Durability Advantage of Cognitive-Behavioral Therapy Over Light Therapy for Winter Depression.
EvidenceSupported by smaller clinical studiesTime to resultsTypically 6–12 weeks
Caution: Best delivered by a licensed mental health professional; not a substitute for crisis support if needed.
Evidence grade not assigned · Traditional use classical
Herbal support for low winter mood
Why it may be relevant
When SAD shows up most as negative, hopeless thinking, St. John's wort is traditionally used to lift low mood through the darker months.
It is one of the most widely used herbal options for depression and low mood. It is offered here on the basis of that established herbal use rather than a SAD-specific trial held in our library.
Dose or use Commonly taken as a standardized extract; follow product labeling and start at a low dose. Check with a pharmacist first.
Key study Traditionally and widely used for depression and low mood; this specific SAD use has not been confirmed in a controlled clinical trial held in our library.
EvidenceCenturies of traditional use across more than one tradition · Human evidence not yet assessedTime to resultsTypically 4-6 weeksTraditional useClassical use across multiple traditions
Caution: Interacts with many prescription drugs, including antidepressants, birth control, and blood thinners. Do not combine with other medicines without checking with a pharmacist or doctor.
Targets seasonal negative thought patterns directly
Why it may be relevant
If SAD is showing up most as stuck or hopeless thinking, CBT works by identifying and reshaping the seasonal beliefs that fuel winter depression.
Supported by clinical research, CBT adapted for SAD has shown a durability advantage — meaning the mindset shifts it builds may help protect against SAD returning in future winters.
Dose or use Typically 8–12 structured sessions with a trained therapist; SAD-specific CBT protocols are available.
Key study RCT (2023, PMID 37330257): Change in Seasonal Beliefs Mediates the Durability Advantage of Cognitive-Behavioral Therapy Over Light Therapy for Winter Depression.
EvidenceSupported by smaller clinical studiesTime to resultsTypically 6–12 weeks
Caution: Best delivered by a licensed mental health professional; not a substitute for crisis support if needed.
Evidence grade not assigned · Traditional use long-standing
Guided music to lift a flat winter mood
Why it may be relevant
When SAD sits as a flat, heavy mood, music therapy uses guided listening and music-making with a trained therapist to gently lift mood and energy.
The library notes music therapy improves mood and reduces symptoms of depression. It is offered on that basis rather than a SAD-specific controlled trial held for this item in our library.
Dose or use Sessions with a credentialed music therapist, or simple daily guided listening at home.
Key study Music therapy is used to support mood and ease depressive symptoms; this specific SAD use is not tied to a controlled trial held for this item in our library.
EvidenceCenturies of traditional use · Human evidence not yet assessedTime to resultsTypically 3-6 weeksTraditional useLong-standing traditional staple
Caution: Generally low-risk; choose a credentialed therapist for structured work and skip tracks that stir up distressing memories.
A flat, heavy mood - low energy, no spark, and little motivation to do anything
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Pressure point
DU20 (Baihui) - Governing Vessel 20
Evidence grade not assigned · Traditional use long-standing
Crown point traditionally used to lift mood
Why it may be relevant
When SAD feels like low energy and a flat mood, DU20 (Baihui), at the crown of the head, is the classic point traditionally used to lift energy and mood.
In Traditional Chinese Medicine, this point is used to uplift energy, ease mild low mood, and clear mental fatigue and brain fog.
Dose or use Apply gentle, steady pressure to the crown of the head for 1-2 minutes, breathing slowly.
Key study Traditionally used in Chinese medicine to uplift mood and relieve mental fatigue; this specific use has not been confirmed in a controlled clinical trial held in our library.
EvidenceCenturies of traditional use · Human evidence not yet assessedTime to resultsVaries; often used as an ongoing daily practiceTraditional useLong-standing traditional staple
Caution: A gentle self-care practice, not a treatment for clinical depression; seek professional care for persistent or severe symptoms.
Evidence grade not assigned · Traditional use long-standing
Serotonin building block for flat mood
Why it may be relevant
When SAD feels like a flat mood and low energy, L-tryptophan is the amino acid your body uses to make serotonin, the mood-steadying chemical that tends to dip in winter.
It is offered as a serotonin precursor to support the low-serotonin side of winter low mood, on that mechanistic basis rather than a SAD-specific trial held in our library.
Dose or use Taken as an oral supplement, often away from protein-heavy meals; follow product labeling.
Key study Used as a serotonin precursor for low mood; this specific SAD use has not been confirmed in a controlled clinical trial held in our library.
EvidenceCenturies of traditional use · Human evidence not yet assessedTime to resultsTypically 2-6 weeksTraditional useLong-standing traditional staple
Caution: Can interact with antidepressants and other serotonergic medicines; do not combine without medical advice.
Evidence grade not assigned · Traditional use long-standing
Guided music to lift a flat winter mood
Why it may be relevant
When SAD sits as a flat, heavy mood, music therapy uses guided listening and music-making with a trained therapist to gently lift mood and energy.
The library notes music therapy improves mood and reduces symptoms of depression. It is offered on that basis rather than a SAD-specific controlled trial held for this item in our library.
Dose or use Sessions with a credentialed music therapist, or simple daily guided listening at home.
Key study Music therapy is used to support mood and ease depressive symptoms; this specific SAD use is not tied to a controlled trial held for this item in our library.
EvidenceCenturies of traditional use · Human evidence not yet assessedTime to resultsTypically 3-6 weeksTraditional useLong-standing traditional staple
Caution: Generally low-risk; choose a credentialed therapist for structured work and skip tracks that stir up distressing memories.
Evidence grade not assigned · Traditional use recognised
Low tryptophan can mean low serotonin
Why it may be relevant
When winter brings a flat, low mood, it can reflect low serotonin, and tryptophan is the amino acid your body needs to make it.
The library links low tryptophan to irritability, anxiety, and depression, so addressing it targets the low-serotonin side of seasonal mood dips.
Dose or use Support through protein-rich foods or supplementation; discuss testing and dosing with your provider.
Key study The library guide links low tryptophan to irritability, anxiety, and depression through reduced serotonin; this is a mechanistic association, not a SAD-specific trial.
EvidenceNot yet assessed · We have not reviewed the literature for this oneTime to resultsTypically a few weeksTraditional useRecognised traditional use
Caution: If you take antidepressants or other serotonergic medicines, raising tryptophan should be done only with medical advice.
What kind of help feels right for you this winter?
I'd rather get to the root of it - check whether low vitamin D or tryptophan is dragging my mood down
–
Nutrient gap worth checking
Tryptophan Deficiency
Evidence grade not assigned · Traditional use recognised
Low tryptophan can mean low serotonin
Why it may be relevant
When winter brings a flat, low mood, it can reflect low serotonin, and tryptophan is the amino acid your body needs to make it.
The library links low tryptophan to irritability, anxiety, and depression, so addressing it targets the low-serotonin side of seasonal mood dips.
Dose or use Support through protein-rich foods or supplementation; discuss testing and dosing with your provider.
Key study The library guide links low tryptophan to irritability, anxiety, and depression through reduced serotonin; this is a mechanistic association, not a SAD-specific trial.
EvidenceNot yet assessed · We have not reviewed the literature for this oneTime to resultsTypically a few weeksTraditional useRecognised traditional use
Caution: If you take antidepressants or other serotonergic medicines, raising tryptophan should be done only with medical advice.
–
Nutrient gap worth checking
Vitamin D Deficiency
Evidence grade not assigned · Traditional use recognised
Low winter sunlight can drop vitamin D
Why it may be relevant
The winter slump often tracks with less sunlight, and less sun means less vitamin D, which the library links to low mood in the darker months.
Getting your vitamin D level checked is a simple step; low mood and fatigue can be associated with low vitamin D, especially in winter.
Dose or use Ask your doctor for a blood test, then supplement to correct a confirmed deficiency under guidance.
Key study The library guide notes low mood or depression can be associated with low vitamin D, particularly in the winter months; this is an association, not proof of cause.
EvidenceNot yet assessed · We have not reviewed the literature for this oneTime to resultsTypically several weeks after correcting a deficiencyTraditional useRecognised traditional use
Caution: More is not better; high-dose vitamin D can be harmful. Supplement to correct a tested deficiency, not blindly.
What kind of help feels right for you this winter?
I'd rather try something I can take - herbal or nutritional supplements for winter mood
Evidence grade not assigned · Traditional use long-standing
Serotonin building block for flat mood
Why it may be relevant
When SAD feels like a flat mood and low energy, L-tryptophan is the amino acid your body uses to make serotonin, the mood-steadying chemical that tends to dip in winter.
It is offered as a serotonin precursor to support the low-serotonin side of winter low mood, on that mechanistic basis rather than a SAD-specific trial held in our library.
Dose or use Taken as an oral supplement, often away from protein-heavy meals; follow product labeling.
Key study Used as a serotonin precursor for low mood; this specific SAD use has not been confirmed in a controlled clinical trial held in our library.
EvidenceCenturies of traditional use · Human evidence not yet assessedTime to resultsTypically 2-6 weeksTraditional useLong-standing traditional staple
Caution: Can interact with antidepressants and other serotonergic medicines; do not combine without medical advice.
Evidence grade not assigned · Traditional use classical
Herbal support for low winter mood
Why it may be relevant
When SAD shows up most as negative, hopeless thinking, St. John's wort is traditionally used to lift low mood through the darker months.
It is one of the most widely used herbal options for depression and low mood. It is offered here on the basis of that established herbal use rather than a SAD-specific trial held in our library.
Dose or use Commonly taken as a standardized extract; follow product labeling and start at a low dose. Check with a pharmacist first.
Key study Traditionally and widely used for depression and low mood; this specific SAD use has not been confirmed in a controlled clinical trial held in our library.
EvidenceCenturies of traditional use across more than one tradition · Human evidence not yet assessedTime to resultsTypically 4-6 weeksTraditional useClassical use across multiple traditions
Caution: Interacts with many prescription drugs, including antidepressants, birth control, and blood thinners. Do not combine with other medicines without checking with a pharmacist or doctor.
Evidence grades describe the strength of published research for Seasonal Affective Disorder (SAD), not a promise of results. A higher grade is not a personal recommendation. Nothing here is medical advice — talk to your clinician before starting anything, especially alongside prescription medication.
Related pressure points
Hands-on options you can try yourself.
Acupressure is a comfort measure, not a treatment for Seasonal Affective Disorder (SAD) itself. Each page shows where the point is and how to press it.
The evidence behind Seasonal Affective Disorder (SAD), in one page
We track 5 natural options for Seasonal Affective Disorder (SAD) — what each is typically used for, usual dose, cautions, and the study behind the ones with real trial data.
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