Issue · Oct 2026New this week: evidence-first longevity readsThe newsletter — one essay, Sunday morningsArchive access — every article, free to readPodcast coming soon — NotebookLM sessionsLetters from readers — reply to any emailIssue · Oct 2026New this week: evidence-first longevity readsThe newsletter — one essay, Sunday morningsArchive access — every article, free to readPodcast coming soon — NotebookLM sessionsLetters from readers — reply to any email

Heart.

Cardiovascular health, explained — blood pressure, cholesterol, and the lifestyle factors that genuinely move heart-disease risk.

In this section
14longreads
Newest
Dec 42025
Section since
2025archive
Reading time
~8min average
This week's longread

Vitamin K2 and Arterial Calcification: Can This Overlooked Vitamin Protect Your Arteries?

Research shows vitamin K2 activates proteins that keep calcium in bones and out of arteries. This guide covers the evidence, best food sources, and who benefits most.

Read the articleHL Benefits Editorial · Dec 4, 2025
Dark leafy greens and fermented foods rich in vitamin K2 arranged on a wooden cutting boardPhotograph · HL Benefits
§ 01

The latest, in long form.

Browse all 14 →
Traditional Finnish wooden sauna interior with warm amber lighting and steam rising from heated stones
CoverHeart

Sauna Bathing for Heart Health: What 20 Years of Finnish Research Actually Proves

A 20-year Finnish study found regular sauna bathing linked to lower risk of sudden cardiac death and cardiovascular mortality.

Jan 1
Vitamin D3 and Second Heart Attack Prevention: The Breakthrough Study That Changes Everything
Heart

Vitamin D3 and Second Heart Attack Prevention: The Breakthrough Study That Changes Everything

A landmark clinical trial found that targeted vitamin D3 supplementation reduced second heart attack risk by 50% in survivors with monitored blood levels.

Mar 19
Vagus Nerve and Heart Health: New Research on the Nerve That Keeps Your Heart Young
Heart

Vagus Nerve and Heart Health: New Research on the Nerve That Keeps Your Heart Young

New research shows the vagus nerve actively protects your heart from aging. Learn what HRV reveals about cardiac health and how to strengthen vagal tone.

Mar 20
The Best Types of Magnesium for Heart Health: A Guide to Palpitations, Blood Pressure, and Arrhythmia
Heart

The Best Types of Magnesium for Heart Health: A Guide to Palpitations, Blood Pressure, and Arrhythmia

Which magnesium forms actually help your heart? This evidence-based guide breaks down taurate, glycinate, citrate, and more for palpitations, blood pressure, and arrhythmia.

Mar 20
§ 02

Companion sections.

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Health

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Food & Nutrition

A companion section to heart, with its own evidence-led reading list.

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Weight Loss

A companion section to heart, with its own evidence-led reading list.

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§ 03

Definitive guides.

All guides →
How Sleep Timing (Not Just Duration) Affects Your Heart: What New Research Reveals
Guide

How Sleep Timing (Not Just Duration) Affects Your Heart: What New Research Reveals

New research shows that when you fall asleep matters for heart health, not just how long. A UK Biobank study of 88,000 people found the optimal bedtime window.

Mar 20
Polyphenol-Rich Foods for Heart Health: The Evidence-Based Guide to What Actually Works
Guide

Polyphenol-Rich Foods for Heart Health: The Evidence-Based Guide to What Actually Works

A meta-analysis of 281 trials shows polyphenol-rich foods measurably reduce blood pressure, improve cholesterol, and protect arterial function.

Mar 20
§ 04

On our desk this week.

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