Topic
Cardiovascular
Cardiovascular is a recurring research topic on Health Canon. This hub collects related explainers and protocols, newest first, each with evidence grades and practical decision frameworks.
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Hormones & Genes
MTHFR Is Not an Actionable Thrombophilia or CVD Indication
Unlike factor V Leiden, common MTHFR SNPs do not change anticoagulation or CVD prevention. Homocysteine-lowering RCTs failed hard outcomes; RPL management is not genotype-driven.
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Environmental Health
Microplastics in Blood, Organs, Brain, and Plaque
Detection in blood, placenta, organs, carotid plaque, and brain tissue shows internalization is real. Detection ≠ proven clinical disease or known toxic dose thresholds.
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Light & Recovery
Laukkanen JAMA Sauna Study: CVD and Sudden Cardiac Death in Finnish Men
KIHD 2,315 men, ~20.7-year follow-up: 4–7 saunas/week vs 1× associated with HR 0.37 SCD and 0.50 fatal CVD after adjustment—graded dose-response, not proven causation.
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Light & Recovery
Sauna Physiology: Heart Rate, Autonomic Stress, and Plasma Volume Expansion
Finnish sauna raises HR toward 120–150 bpm like passive cardio stress, redistributes blood to skin, and repeated post-exercise heat can expand plasma volume—BP falls in recovery with orthostatic risk.
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Nutrition
Seed Oils, Linoleic Acid Biomarkers, and Mendelian Randomization
Higher circulating linoleic acid associates with lower cardiovascular risk in major pooling studies—conflicting with some heated-oil narratives. MR is not a supermarket policy engine.
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Light & Recovery
Sauna Risks: Alcohol, Acute Cardiac Events, and Who Needs Medical Caution
Habitual Finnish sauna looks favorable in cohorts—but acute risk rises with alcohol, hypotension, recent MI instability, and unsupervised extremes. Safety is not the enemy of benefits.
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Light & Recovery
Finnish Sauna vs Infrared: Physics, Evidence Mapping, and Modality Conflation
Finnish dry ~80–100°C carries hard-outcome cohorts. Consumer IR ~45–60°C must not inherit KIHD hazard ratios. Waon is a clinical far-IR protocol, not spa marketing.
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Light & Recovery
Sauna and Endothelial Function: Vascular Biology Behind the Heat Habit
Passive heat can improve vascular function markers in experimental settings. Finnish epidemiology aligns with vascular risk reduction—but mechanisms are not detox magic.
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Hormones & Genes
MTHFR, Thrombophilia, CVD, and Recurrent Pregnancy Loss Myths
Why common MTHFR SNPs are not managed like factor V Leiden—and what HOPE-2 means for hearts.
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Men's Health
MTHFR in Men: Fertility Claims and Cardiovascular Axes
What male-factor fertility blogs get wrong—and what CVD trials actually measured.
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Light & Recovery
Sauna, Stroke, and Dementia: Finnish Cohort Evidence
4–7× weekly Finnish sauna linked to lower stroke and dementia HRs—still observational.
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Light & Recovery
Sauna Dose: Temperature, Duration, and Frequency
Finnish anchors: ~80–100°C, often 5–20+ minutes, benefits steepest at 4–7×/week.
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Nutrition
Seed Oil CVD Trials: AHA, Cochrane, and Ramsden Side by Side
PUFA substitution lowers LDL; pure linoleic RCTs do not prove a mortality free lunch.
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Environmental Health
Microplastics in Arterial Plaque: What the Marfella NEJM Study Shows
Marfella 2024 found micro- and nanoplastics in 58.4% of carotid plaques and higher rates of MI, stroke, or death—an observational landmark, not proof that removal cures heart disease.
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Metabolic Health
hs-CRP and IL-6: Inflammation Markers Without Allergy Confusion
hs-CRP stratifies residual CV inflammatory risk. It does not diagnose food allergy or MCAS.
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Light & Recovery
Evidence-Based Sauna Protocols (2026)
Finnish frequency and duration, acute BP bouts, post-exercise heat, infrared limits, and safety gates—ranked by human evidence.
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Men's Health
Sauna and Men’s Cardiovascular Data: KIHD Hazard Ratios Explained
In Finnish men, 4–7 sauna sessions/week vs 1×/week: SCD HR 0.37, fatal CVD ~0.50—observational, traditional dry sauna, not infrared.
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Light & Recovery
Sauna and Blood Pressure: Evidence for Hypertension Support
Heat stress is not a drug—but Finnish-style sauna has real BP and CV observational signals.
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Light & Recovery
Sauna Benefits: What the Evidence Actually Shows
Finnish dry-sauna cohort data on heart, stroke, and blood pressure—separated from infrared marketing, detox myths, and pregnancy risks.
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Light & Recovery
Finnish Sauna and Mortality: The KIHD Laukkanen JAMA Study Explained
2,315 men, 20.7-year follow-up: 4–7 sauna sessions/week vs 1×/week associated with HR 0.37 for sudden cardiac death—observational, not causal proof.
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