Diseases & Longevity · File 06

Major depression. The bidirectional axis with everything else.

Major depression reduces life expectancy by 7 to 11 years (GBD 2019). Not just by suicide — mostly by cardiovascular, oncological, and all-cause mortality. Depression is cause and consequence of chronic diseases: bidirectional with HF, dementia, chronic pain, T2D, cancer. That is why it is a central axis of longevity medicine — not a separate piece.

Why mental health is not 'separate' in longevity

Tajor depression and the rest of chronic diseases are linked by a bidirectional association. A patient with ischemic heart disease has higher depression risk; one with untreated depression has higher cardiovascular risk. That bidirectionality — documented for HF, stroke, cancer, dementia, T2D, and chronic pain — means mental health cannot be treated as a separate piece from physical health in a serious longevity program.

The Walker et al. (JAMA Psychiatry 2015) meta-analysis synthesized 293 studies and quantified: major depression increases all-cause mortality with a hazard ratio of 1.71. The Danish national cohort Plana-Ripoll et al. (Lancet 2019) demonstrated that mortality attributable to mental disorders (especially 'excess mortality' from physical causes) explains a substantial proportion of premature mortality. Depression is included as one of 14 modifiable dementia risk factors in the Lancet Commission 2024.

Ignoring depression in a longevity protocol is ignoring one of the strongest predictors of premature mortality.
Walker · JAMA Psychiatry · 2015 · meta-analysis

All-cause mortality hazard ratio in depression

Meta-analysis of 293 studies (Walker et al., JAMA Psychiatry 2015). Major depression significantly increases all-cause mortality — effect maintained after adjustment for medical comorbidities.

  • All-cause mortality

    HR 1.71

    Walker et al. meta-analysis: HR 1.71 (95% CI 1.54-1.89) for all-cause mortality in major depression, adjusted for age and comorbidity.
    — Walker et al., JAMA Psychiatry 2015

  • Years of life lost

    −7 a −11 años LE

    GBD 2019: major depression reduces life expectancy 7–11 years — mostly via cardiovascular and oncological mortality, not suicide.
    — GBD 2019

  • CV comorbidity

    OR 1.64 IAM

    INTERHEART (Yusuf 2004 Lancet) included psychosocial factors (stress, depression) among the 9 factors explaining 90% of MI risk. Bidirectional with ischemic heart disease.
    — Yusuf et al., Lancet 2004

  • Dementia · modifiable factor

    Lancet Commission 2024

    Untreated depression is included as one of the 14 modifiable dementia risk factors. Well-established mental-cognitive bidirectionality.
    — Livingston et al., Lancet Commission 2024

Chap. 03 · Quality of life and daily function

The mental component of SF-36 — and why it matters

Depression has quantifiable impact on the mental component (MCS) and physical (PCS) via associated inactivity and somatization. It is one of the main predictors of ADL disability.

  • MCS (mental component)

    Deterioro marcado

    The SF-36 mental component deteriorates markedly in clinical depression. Bidirectional association with multimorbidity — patients with more chronic diseases have higher depression risk.
    — Hu et al., BMC Public Health 2024

  • PCS (physical component)

    Por inactividad

    Depression also deteriorates the physical component — inactivity, pain somatization, and fatigue reduce measurable function and quality of life.
    — Hu et al., BMC Public Health 2024; Ma 2021

  • Chronic pain

    Comorbilidad ×2

    Chronic pain and depression coexist in ~50% of cases. Each worsens the other's prognosis. Ma et al. 2021 (BMC Psychiatry): depression mediates PCS deterioration in multimorbidity.
    — Ma et al., BMC Psychiatry 2021

  • Suicide

    Causa específica · grave

    Suicide risk in major depression is ~20× the general population. But — contrary to common perception — most years of life lost from depression come from other causes, not suicide.
    — GBD 2019; Plana-Ripoll 2019

What we don't do — and what we do

Wellness Care does not substitute psychiatry or psychotherapy. Major depression is a serious medical condition requiring specialized approach — evidence-based psychotherapy (CBT, interpersonal therapy), pharmacotherapy when indicated, suicide risk assessment. That belongs to the psychiatrist and clinical psychologist, and that is how it should be. No supplement substitutes appropriate antidepressant treatment.

What we do: we evaluate shared biological axes between depression and chronic diseases — inflammaging (hsCRP, IL-6 — 'inflammatory' depression is a growing phenotype in the literature), HRV and autonomic stress response, functional hormonal profile (DUTCH — diurnal cortisol, functional thyroid, sex hormones), urinary neurotransmitters (Doctor's Data Comprehensive Neurotransmitter Profile), and medical comorbidities. On that map we coordinate with the specialist when clinical indication exists.

Depression is not 'lack of willpower' nor cured by supplements. But its biology is measurable, and that changes the clinical conversation.
How we measure it

The layers of depression assessment
in longevity terms

Depression intersects with all chronic diseases. We assess shared biological axes without substituting psychiatric management.

Advanced biomarkers

21 specialized panels across 8 clinical categories — biological age, inflammaging, metabolic profile, functional hormonal, microbiota. The quantitative layer.

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Bioregulatory medicine

Autonomic regulation, HRV, stress response. The functional trajectory that precedes clinical diagnosis.

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Functional medicine

Shared root causes — mitochondrial dysfunction, inflammaging, neuroendocrine dysregulation — before organ pathology.

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The Longevity Program

How this assessment integrates into the full program — from initial valuation to individualized protocol design under medical judgment.

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Featured evidence

The papers that structure
the mental-physical conversation

Three publications that quantify depression's weight on mortality and comorbidity.

"Major depression was associated with hazard ratio 1.71 (95% CI 1.54–1.89) for all-cause mortality across 293 studies."
Meta-análisis · 293 estudios
Walker et al.
JAMA Psychiatry · 2015
"All mental disorders were associated with higher mortality rates; excess mortality from physical conditions explained a substantial proportion."
Cohorte Danesa · n=7.4M
Plana-Ripoll et al.
The Lancet · 2019
"Depression is included among the 14 modifiable risk factors potentially accounting for 45% of dementia risk across the life course."
Lancet Commission 2024
Livingston et al.
The Lancet · 2024

Frequently asked questions about depression and longevity

The most recurrent questions about depression's weight on mortality, its bidirectionality with chronic diseases, and where longevity medicine ends and psychiatry begins.

01

How many years of life does someone with major depression lose?

GBD 2019 estimates 7–11 years of life expectancy loss in major depression.

Most is not due to suicide but to physical-cause mortality — cardiovascular, oncological, infectious.

Plana-Ripoll et al. (Lancet 2019, Danish cohort n=7.4M) demonstrated that mortality attributable to mental disorders mostly comes from 'excess mortality' from physical causes.

02

What is 'inflammatory depression' and why does it matter?

Inflammatory depression is a phenotype described in the literature (Miller & Raison Nat Rev Immunol 2016) characterized by elevated pro-inflammatory cytokines (IL-6, TNF-α, hsCRP).

Approximately 1/3 of patients with depression present elevated inflammation.

This subgroup tends to respond less well to traditional antidepressants and may benefit from inflammation-directed approaches.

It is a shared axis with cardiovascular and oncological inflammaging.

03

Does Wellness Care prescribe antidepressants?

No. Antidepressant prescription (SSRIs, SNRIs, atypicals), suicide risk evaluation, and clinical depression management are the psychiatrist's responsibility.

Any 'longevity protocol' offering to substitute antidepressants with supplements in clinical depression is dangerous.

What we do: evaluate shared biological axes (inflammaging, HRV, functional hormonal, urinary neurotransmitters), identify medical comorbidities, and coordinate with psychiatry and psychotherapy when indicated.

04

What biomarkers are measured in depression from a longevity perspective?

From a longevity perspective:

· Inflammaging: hsCRP, IL-6, TNF-α
· HRV and autonomic stress response
· DUTCH functional hormonal: 4-point diurnal cortisol, sex hormones and metabolites, melatonin
· Urinary neurotransmitters: serotonin, dopamine, GABA, glutamate (Doctor's Data)
· Functional thyroid profile (including reverse T3)
· MTHFR: relevant for methylfolate vs folic acid
· Intracellular vitamins and minerals (SpectraCell — B12, folate, B6, zinc, magnesium)

05

Does depression increase dementia risk?

Yes. Untreated depression is included as one of the 14 modifiable dementia risk factors in the Lancet Commission 2024.

The association is bidirectional:

· Early-life depression predicts higher dementia risk decades later
· Incipient dementia can manifest as late-onset depression

Treating depression in time is one of the most solid modifiable interventions in secondary dementia prevention.

06

What lifestyle interventions have evidence in depression?

Best-evidence interventions:

· Structured physical exercise (effect comparable to antidepressants in mild-moderate depression)
· Regulated sleep
· Mediterranean diet (SMILES trial Jacka 2017 BMC Medicine)
· Sunlight exposure / light therapy
· Treatment of medical comorbidities (hypothyroidism, nutritional deficits, OSA)
· Social connection

Lifestyle interventions are complement — not substitute — to psychiatric management when medication or psychotherapy is indicated.

The non-negotiable axis

Ignoring depression in a longevity protocol is ignoring 7 to 11 years of lost life expectancy — and the strongest independent predictor of cardiovascular, oncological, and dementia mortality.

Measure shared biological axes, coordinate with psychiatry and psychotherapy when indicated, integrate mental health as part of the protocol and not as a separate piece — that is serious longevity.

Mental health as longevity axis?

Book an integrated assessment · body and mind

We evaluate inflammaging profile (hsCRP, IL-6), HRV, functional hormonal profile (DUTCH), urinary neurotransmitters, and medical comorbidities. Depression is not addressed with supplements — but it is addressed better when its complete biology is understood. We coordinate with psychiatry/psychotherapy when indicated.

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