The Healthspan Map · Neurological & Mental Health
Anxiety
Named for Anxiety
| Nutrient or lever | Direction | Strength | Evidence type | What was found | Source |
|---|---|---|---|---|---|
| Breath/mind (slow breathing) | Do this | Strong | Systematic review | Slow paced breathing (~6/min) reduces anxiety and shifts autonomic balance toward parasympathetic tone. | Zaccaro et al. 2018; slow-breathing reviews (opens in a new tab) |
| Breath/mind (slow breathing) | Do this | Strong | RCT / meta-analysis | Slow paced breathing (~6/min) reduces anxiety and shifts autonomic balance toward parasympathetic tone. | "Effects of voluntary slow breathing on heart rate and heart rate variability: a systematic review and meta-analysis", Neurosci Biobehav Rev 2022 (opens in a new tab) |
| Caffeine — mind amount & timing | Do this | Strong | RCT / meta-analysis | Higher caffeine intake raises anxiety risk dose-dependently (SMD 0.94; steep >~400 mg/day). | Caffeine-anxiety meta-analysis (Front. Psychol. 2024) (opens in a new tab) |
| Cardio (moderate + intervals) | Do this | Strong | RCT / meta-analysis | Regular aerobic and mind-body exercise lowers cortisol and eases anxiety/psychological distress. | Exercise & cortisol network meta-analysis 2025 (opens in a new tab) |
| Selenium | Don't overdo | Strong | Established clinical | Selenosis is a recognized toxidrome; NIH ODS and multiple human reports document anxiety, irritability, nervousness and insomnia from selenium overexposure (incl. a 201-person supplement outbreak). | Vinceti et al. 2013; NIH ODS; trace-minerals review (opens in a new tab) |
| Selenium | Don't overdo | Strong | Established clinical | Selenosis is a recognized toxidrome; NIH ODS and multiple human reports document anxiety, irritability, nervousness and insomnia from selenium overexposure (incl. a 201-person supplement outbreak). | NIH Office of Dietary Supplements — Selenium (opens in a new tab) |
| Tobacco / vaping — quit | Do this | Strong | RCT / meta-analysis | Quitting smoking reduces anxiety (SMD -0.37; effect comparable to antidepressants); guideline bodies establish smoking as harmful to mental health and debunk the "calming" belief. | Taylor et al. 2014, BMJ (opens in a new tab) |
| Tobacco / vaping — quit | Do this | Strong | RCT / meta-analysis | Quitting smoking reduces anxiety (SMD -0.37; effect comparable to antidepressants); guideline bodies establish smoking as harmful to mental health and debunk the "calming" belief. | Change in mental health after smoking cessation: systematic review and meta-analysis, BMJ 2014 (opens in a new tab) |
| Added Sugars | Don't overdo | Moderate | RCT / meta-analysis | High added-sugar/ultra-processed intake is associated with greater anxiety symptoms. | Lane et al. 2022 (opens in a new tab) |
| Alcohol — cut back | Do this | Moderate | RCT / meta-analysis | Alcohol disrupts HPA-axis recovery and the stress/anxiety response; self-medication worsens regulation. | Weckesser et al. 2025, Transl Psychiatry (opens in a new tab) |
| Breathing rate | Watch this | Moderate | Systematic review | Slow paced breathing (~6/min) reduces anxiety and shifts autonomic balance toward parasympathetic tone. | Zaccaro et al. 2018; slow-breathing reviews (opens in a new tab) |
| Breathing rate | Watch this | Moderate | RCT / meta-analysis | Slow paced breathing (~6/min) reduces anxiety and shifts autonomic balance toward parasympathetic tone. | "Effects of voluntary slow breathing on heart rate and heart rate variability: a systematic review and meta-analysis", Neurosci Biobehav Rev 2022 (opens in a new tab) |
| Calm rest space | Do this | Moderate | RCT / meta-analysis | Greenspace/restorative-environment exposure lowers salivary cortisol and eases anxiety. | Twohig-Bennett & Jones 2018 (opens in a new tab) |
| Daily movement baseline | Do this | Moderate | RCT / meta-analysis | Regular aerobic and mind-body exercise lowers cortisol and eases anxiety/psychological distress. | Exercise & cortisol network meta-analysis 2025 (opens in a new tab) |
| EPA/DHA (omega-3) | Eat enough of | Moderate | RCT / meta-analysis | Marine omega-3 (EPA/DHA ~2 g/d) moderately reduces anxiety symptoms (low GRADE certainty). | Bafkar et al. 2024 (opens in a new tab) |
| Falling & staying asleep | Watch this | Moderate | RCT / meta-analysis | Poor/short sleep and anxiety are bidirectionally linked; better sleep lowers physiological arousal. | De Nys et al. 2022 (opens in a new tab) |
| Flexibility (stretching) | Do this | Moderate | RCT / meta-analysis | Regular aerobic and mind-body exercise lowers cortisol and eases anxiety/psychological distress. | Exercise & cortisol network meta-analysis 2025 (opens in a new tab) |
| Inner circle (close ties) | Watch this | Moderate | RCT / meta-analysis | Loneliness is moderately associated with anxiety (r~0.40); stronger ties buffer it. | Gabarrell-Pascuet et al. 2023 (opens in a new tab) |
| Loneliness — reduce | Watch this | Moderate | RCT / meta-analysis | Loneliness is moderately associated with anxiety (r~0.40); stronger ties buffer it. | Gabarrell-Pascuet et al. 2023 (opens in a new tab) |
| Magnesium | Eat enough of | Moderate | Systematic review | Magnesium attenuates HPA-axis activity and benefits subjective anxiety. | Boyle, Lawton & Dye 2017, Nutrients (opens in a new tab) |
| Screens before bed — cut back | Do this | Moderate | RCT / meta-analysis | Problematic smartphone use is associated with higher anxiety (OR 3.05) and perceived stress. | Sohn et al. 2019, BMC Psychiatry (opens in a new tab) |
| Sleep duration | Watch this | Moderate | RCT / meta-analysis | Sleep deprivation significantly raises state anxiety (meta-analysis) via heightened amygdala reactivity; short sleep predicts anxiety. | Sleep deprivation & state anxiety meta (opens in a new tab) |
| Sleep hygiene - Wind-down | Do this | Moderate | RCT / meta-analysis | Poor/short sleep and anxiety are bidirectionally linked; better sleep lowers physiological arousal. | De Nys et al. 2022 (opens in a new tab) |
| Sleep quality (refreshed) | Watch this | Moderate | RCT / meta-analysis | Poor/short sleep and anxiety are bidirectionally linked; better sleep lowers physiological arousal. | De Nys et al. 2022 (opens in a new tab) |
| Strength (resistance) | Do this | Moderate | RCT / meta-analysis | Regular aerobic and mind-body exercise lowers cortisol and eases anxiety/psychological distress. | Exercise & cortisol network meta-analysis 2025 (opens in a new tab) |
| Sugary drinks & snacks — cut back | Do this | Moderate | RCT / meta-analysis | Higher ultra-processed intake is associated with greater anxiety (OR 1.48) and mental-disorder symptoms. | Lane et al. 2022 (opens in a new tab) |
| Toxic relationships — reduce | Watch this | Moderate | RCT / meta-analysis | Loneliness is moderately associated with anxiety (r~0.40); stronger ties buffer it. | Gabarrell-Pascuet et al. 2023 (opens in a new tab) |
| Ultra-processed food — cut back | Do this | Moderate | RCT / meta-analysis | Higher ultra-processed intake is associated with greater anxiety (OR 1.48) and mental-disorder symptoms. | Lane et al. 2022 (opens in a new tab) |
| Warmth & quality of ties | Watch this | Moderate | RCT / meta-analysis | Loneliness is moderately associated with anxiety (r~0.40); stronger ties buffer it. | Gabarrell-Pascuet et al. 2023 (opens in a new tab) |
| Anchor foods | Watch this | Emerging | RCT / meta-analysis | Higher ultra-processed intake is associated with greater anxiety (OR 1.48) and mental-disorder symptoms. | Lane et al. 2022 (opens in a new tab) |
| Belonging (groups / third place) | Watch this | Emerging | RCT / meta-analysis | Loneliness is moderately associated with anxiety (r~0.40); stronger ties buffer it. | Gabarrell-Pascuet et al. 2023 (opens in a new tab) |
| Colours a day | Watch this | Emerging | RCT / meta-analysis | Higher ultra-processed intake is associated with greater anxiety (OR 1.48) and mental-disorder symptoms. | Lane et al. 2022 (opens in a new tab) |
| Cook real food | Do this | Emerging | RCT / meta-analysis | Higher ultra-processed intake is associated with greater anxiety (OR 1.48) and mental-disorder symptoms. | Lane et al. 2022 (opens in a new tab) |
| Folate (B9) | Eat enough of | Emerging | RCT / meta-analysis | B-vitamin supplementation aids stress/anxiety regulation; supports neurotransmitter synthesis. | Young et al. 2019, Nutrients (opens in a new tab) |
| Iron | Eat enough of | Emerging | RCT / trial | Genetically lower iron status raises anxiety-disorder risk; iron-deficiency anemia relates to more anxiety. | Iron-status MR 2024; Trace-minerals & anxiety review 2023 (opens in a new tab) |
| Iron | Eat enough of | Emerging | Cohort / observational | Genetically lower iron status raises anxiety-disorder risk; iron-deficiency anemia relates to more anxiety. | "The causal effect of iron status on risk of anxiety disorders: a two-sample Mendelian randomization study", PLoS One 2024 (opens in a new tab) |
| Morning daylight | Do this | Emerging | Systematic review | Morning bright light supports circadian/cortisol regulation; bright-light therapy has RCT mood benefit. | Light & HPA-axis rhythms review 2023 (opens in a new tab) |
| Movement (breaking up sitting) | Do this | Emerging | RCT / meta-analysis | Regular aerobic and mind-body exercise lowers cortisol and eases anxiety/psychological distress. | Exercise & cortisol network meta-analysis 2025 (opens in a new tab) |
| Pantothenic acid (B5) | Eat enough of | Emerging | RCT / meta-analysis | B-group vitamins aid anxiety regulation; B5 is a precursor of coenzyme A in adrenal steroid synthesis. | Young et al. 2019; adrenal CoA synthesis (opens in a new tab) |
| Selenium | Eat enough of | Emerging | Review / narrative | Low selenium status is inversely associated with anxiety (U-shaped risk); supplementation shows promise. | Trace-minerals & anxiety review 2023 (opens in a new tab) |
| Sleep hygiene - Bedroom | Do this | Emerging | RCT / meta-analysis | Poor/short sleep and anxiety are bidirectionally linked; better sleep lowers physiological arousal. | De Nys et al. 2022 (opens in a new tab) |
| Sleep hygiene - Clock & light | Do this | Emerging | RCT / meta-analysis | Poor/short sleep and anxiety are bidirectionally linked; better sleep lowers physiological arousal. | De Nys et al. 2022 (opens in a new tab) |
| Sleep hygiene - Intake & timing | Do this | Emerging | RCT / meta-analysis | Poor/short sleep and anxiety are bidirectionally linked; better sleep lowers physiological arousal. | De Nys et al. 2022 (opens in a new tab) |
| Sodium | Don't overdo | Emerging | Cohort / observational | High salt intake activates the HPA axis and raises cortisol, amplifying the anxiety/stress response. | High-salt & HPA-axis 2023, Cardiovasc Res (opens in a new tab) |
| Staying in touch (social reps) | Do this | Emerging | RCT / meta-analysis | Loneliness is moderately associated with anxiety (r~0.40); stronger ties buffer it. | Gabarrell-Pascuet et al. 2023 (opens in a new tab) |
| Vitamin B12 | Eat enough of | Emerging | Review / narrative | B12 deficiency is linked to neuropsychiatric symptoms incl. anxiety; repletion helps. | Neuropsychiatric B12-deficiency case report; Young 2019 (opens in a new tab) |
| Vitamin B12 | Don't overdo | Emerging | Established clinical | High-dose B12 produced anxiety, akathisia and insomnia, resolving after stopping; confounded by underlying deficiency. | Cleveland Clinic — High B12 Levels (symptoms include anxiety) (opens in a new tab) |
| Vitamin B6 | Eat enough of | Emerging | RCT / meta-analysis | B-vitamin supplementation aids stress/anxiety regulation; supports neurotransmitter synthesis. | Young et al. 2019, Nutrients (opens in a new tab) |
| Vitamin C | Eat enough of | Emerging | Review / narrative | Vitamin C reduced anxiety in an RCT; high-dose vitamin C lowered cortisol and subjective stress. | de Oliveira et al. 2015; Brody et al. 2002 (opens in a new tab) |
| Vitamin C | Eat enough of | Emerging | RCT / trial | Vitamin C reduced anxiety in an RCT; high-dose vitamin C lowered cortisol and subjective stress. | Brody et al., "A randomized controlled trial of high dose ascorbic acid for reduction of blood pressure, cortisol, and subjective responses to psychological stress", Psychopharmacology 2002 (opens in a new tab) |
| Vitamin D | Eat enough of | Emerging | RCT / meta-analysis | Vitamin D reduces negative emotions incl. anxiety; benefit greatest in deficiency. | Cheng, Huang & Huang 2020 (opens in a new tab) |
| Water / hydration | Do this | Emerging | RCT / meta-analysis | Higher ultra-processed intake is associated with greater anxiety (OR 1.48) and mental-disorder symptoms. | Lane et al. 2022 (opens in a new tab) |
| Zinc | Eat enough of | Emerging | RCT / trial | Zinc deficiency is associated with anxiety; zinc repletion may ease symptoms. | Trace-minerals & anxiety review 2023; zinc RCT (elderly) (opens in a new tab) |
Held for the whole Neurological & Mental Health system
These rows name no single condition. The Map records them against the whole body system, so they are shown separately rather than folded in.
| Nutrient or lever | Direction | Strength | Evidence type | What was found | Source |
|---|---|---|---|---|---|
| Falling & staying asleep | Watch this | Strong | RCT / meta-analysis | Insomnia roughly doubles the longitudinal risk of developing depression. | Baglioni et al., J Affect Disord 2011 (insomnia as predictor of depression, meta-analysis) (opens in a new tab) |
| Loneliness — reduce | Watch this | Strong | Established clinical | Social isolation and loneliness are modifiable risk factors for dementia; social interventions can slow cognitive decline. | Social isolation and dementia review (2025) (opens in a new tab) |
| Manganese | Don't overdo | Strong | Established clinical | Manganese excess accumulates in the basal ganglia and causes MANGANISM — a Parkinson-like extrapyramidal syndrome (bradykinesia, rigidity, tremor, gait/speech changes). Chiefly from inhalation (welding/mining), contaminated water, or IV/parenteral nutrition and liver disease; the oral UL is 11 mg. | NIH DRI / manganism literature (opens in a new tab) |
| Manganese | Don't overdo | Strong | RCT / meta-analysis | Manganese excess accumulates in the basal ganglia and causes MANGANISM — a Parkinson-like extrapyramidal syndrome (bradykinesia, rigidity, tremor, gait/speech changes). Chiefly from inhalation (welding/mining), contaminated water, or IV/parenteral nutrition and liver disease; the oral UL is 11 mg. | Manganese exposure and cognitive performance: A meta-analytical approach, Environ Pollut 2023 (opens in a new tab) |
| Sodium | Eat enough of | Strong | Established clinical | Acute severe hyponatremia causes cerebral edema, confusion, seizures, coma and can be lethal; it is the most common electrolyte disorder (usually from water excess/illness, not low salt intake). | LPI / StatPearls – Hyponatremia (opens in a new tab) |
| Sodium | Eat enough of | Strong | Established clinical | Acute severe hyponatremia causes cerebral edema, confusion, seizures, coma and can be lethal; it is the most common electrolyte disorder (usually from water excess/illness, not low salt intake). | Linus Pauling Institute — Sodium (opens in a new tab) |
| Water | Don't overdo | Strong | Established clinical | Overhydration (drinking faster than the kidneys can excrete, ~0.8-1 L/hour) dilutes blood sodium -> hyponatremia/water intoxication: headache, nausea, confusion, seizures, cerebral edema, coma and death. Seen in endurance athletes and psychogenic polydipsia. (Directly connects to the Sodium deficiency row.) | Water-intoxication systematic review (opens in a new tab) |
| Belonging (groups / third place) | Watch this | Moderate | Established clinical | Group engagement and community connection help preserve cognition and mental health. | Social engagement and cognition review (2025) (opens in a new tab) |
| Breath (how you breathe) | Watch this | Moderate | RCT / meta-analysis | Slow breathing shifts autonomic balance toward parasympathetic activity, reducing stress and anxiety. | Slow-paced breathing meta-analysis, Mindfulness 2024 (opens in a new tab) |
| Copper | Don't overdo | Moderate | Established clinical | Copper accumulation (Wilson's disease) causes neurological (tremor, dystonia, dysarthria) and psychiatric symptoms, plus Kayser-Fleischer eye rings. | Wilson's disease literature (opens in a new tab) |
| Daytime alertness | Watch this | Moderate | Established clinical | Excessive sleepiness reduces mental processing, concentration and reaction time. | Sleepiness and neurocognitive-function literature (opens in a new tab) |
| Inner circle (close ties) | Watch this | Moderate | Established clinical | Rich social ties protect mental and cognitive health; isolation raises dementia risk. | Social engagement and cognition review (2025) (opens in a new tab) |
| Magnesium | Don't overdo | Moderate | Established clinical | Hypermagnesemia causes lethargy, muscle weakness, difficulty breathing and depression. | NIH ODS – Magnesium (opens in a new tab) |
| Molybdenum | Eat enough of | Moderate | Established clinical | Dietary deficiency is essentially unreported; the genetic molybdenum cofactor deficiency (MoCD) causes neonatal seizures, severe brain degeneration and early death. One TPN case caused headache, tachycardia and night blindness. | MoCD literature / NIH ODS – Molybdenum (opens in a new tab) |
| Molybdenum | Eat enough of | Moderate | Established clinical | Dietary deficiency is essentially unreported; the genetic molybdenum cofactor deficiency (MoCD) causes neonatal seizures, severe brain degeneration and early death. One TPN case caused headache, tachycardia and night blindness. | NIH Office of Dietary Supplements — Molybdenum (opens in a new tab) |
| Screens before bed — cut back | Do this | Moderate | RCT / meta-analysis | Problematic smartphone use is linked to poorer mental health - higher stress, anxiety and depression. | Yang et al., Psychiatry Research 2020 (meta-analysis) (opens in a new tab) |
| Sleep duration | Watch this | Moderate | Established clinical | Insufficient sleep impairs cognition and mood regulation. | Sleep-cognition/mood literature (AHA statement) (opens in a new tab) |
| Sleep quality (refreshed) | Watch this | Moderate | RCT / meta-analysis | Poor sleep quality raises risk of depression, anxiety and cognitive dysfunction. | Sleep-quality and mental-health meta-analyses (opens in a new tab) |
| Staying in touch (social reps) | Do this | Moderate | Established clinical | Ongoing social engagement helps protect cognitive function. | Social engagement and cognition review (2025) (opens in a new tab) |
| Vitamin E | Don't overdo | Moderate | RCT / meta-analysis | Two trials found increased hemorrhagic (brain) stroke risk with alpha-tocopherol supplements. | NIH ODS – Vitamin E (ATBC; Physicians' Health Study) (opens in a new tab) |
| Warmth & quality of ties | Watch this | Moderate | Cohort / observational | Relationship quality predicted cognitive health; secure attachment predicted better memory years later. | Harvard Study of Adult Development (opens in a new tab) |
| Alcohol — cut back | Do this | Emerging | Established clinical | Alcohol contributes to alcohol-use disorders, epilepsy and other mental-health and neurological harms. | Global Burden of Disease Alcohol Collaborators, Lancet 2018 (opens in a new tab) |
| Balance (one-leg stand) | Watch this | Emerging | Established clinical | Single-leg balance is impaired by neurological conditions (Parkinson's, MS, dementia), reflecting central postural control. | Single Leg Stance Test (clinical review) (opens in a new tab) |
| Blood oxygen (SpO2) | Watch this | Emerging | Established clinical | Hypoxemia reduces oxygen delivery to the brain, causing confusion and, if chronic, cognitive impairment. | Hypoxemia literature (opens in a new tab) |
| Blood pressure | Watch this | Emerging | RCT / meta-analysis | High blood pressure is the leading risk factor for stroke and is linked to vascular cognitive decline. | Prospective Studies Collaboration / hypertension literature (opens in a new tab) |
| Breathing rate | Watch this | Emerging | Established clinical | Respiratory rate is often the first vital sign to change with a shift in cardiac or neurological state. | Vital-signs assessment guide (opens in a new tab) |
| Cardio / VO2max | Watch this | Emerging | Cohort / observational | Low CRF is associated with higher risk of dementia and depression across cohort meta-analyses. | Lang et al., BJSM 2024 (opens in a new tab) |
| Sleep regularity | Watch this | Emerging | Cohort / observational | Irregular sleep patterns are associated with poorer cognitive and academic performance. | Circadian-disruption / performance literature (opens in a new tab) |