The 4V Journal
A library for the questions that matter.
Plain-English guides that help you understand longevity, performance and emerging health science.
01
Featured · Longevity
Healthspan: The Years That Matter Most
A practical introduction to the idea of healthspan—and why the quality of years deserves as much attention as their number.
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02
Research Literacy
How to Read a Certificate of Analysis
A certificate of analysis is a record to interpret, not a shortcut to certainty.
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03
Emerging Research
Preclinical Evidence vs. Human Evidence
Why the setting of a study matters as much as its headline.
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04
Peptide Science
Peptide Purity: What the Percentage Actually Tells You
A percentage can be one data point. It is not a complete quality narrative.
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05
Longevity
How to Evaluate Emerging Longevity Research
A quieter framework for reading a fast-moving field without mistaking possibility for proof.
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06
Performance
Creatine: What the Human Research Supports
A research-grounded reading of creatine’s established human evidence, including the contexts that still deserve care.
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07
Healthy Aging
Resistance Training & Healthy Aging: Evidence With Context
What randomized trials and observational studies say about strength, function, and healthy aging—without turning population evidence into a prescription.
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08
Emerging Research
Retatrutide: What the Clinical Program Shows
A careful look at an advancing clinical program: human trial findings, sponsor-reported results, and investigational status remain distinct.
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09
Hormones & Signaling
Kisspeptin: The Pathway Is Not the Prescription
Kisspeptin has meaningful human research across reproductive hormone physiology and IVF, but formulation and study setting matter.
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10
Emerging Research
GHK-Cu: Topical Evidence and Open Questions
Human topical studies, preclinical biology, and unresolved questions belong in the same picture—without treating them as interchangeable.
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