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THE VELRI LIBRARY

Understand your health. Know what to ask.

Guides to treatments, lab results and common health questions. Sources are listed in every article.

Longevity & Performance

59 guides · Page 1 of 5
Longevity & PerformanceLongevity

Persistent fatigue: what a medical evaluation adds

An energy supplement and a fatigue evaluation answer different questions. What the evaluation looks at before discussing a product.

3 sources · FDA, Endocrine SocietyRead · 2 min →
Longevity & PerformanceLongevity

Night-shift sleep scores: useful data, incomplete context

Wearable scores can prompt useful questions, but the device, measurement method and work schedule determine what the numbers can reasonably tell you.

4 sources · NIH, PubMed / PMCRead · 2 min →
Longevity & PerformanceLongevity

Why the afternoon slump may start the night before

Sleep timing, travel and caffeine can all affect afternoon alertness. How their timing helps explain a recurring energy dip.

3 sources · NIHRead · 2 min →
Longevity & PerformanceLongevity

What medical oversight adds to a peptide decision

Tracking symptoms and lab numbers cannot establish whether a peptide is appropriate. What a provider and pharmacy each need to clarify.

3 sources · FDARead · 2 min →
Longevity & PerformanceLongevity

Fatigue after weeks of overtime: what else could contribute?

Long hours can disrupt sleep, but persistent fatigue also deserves a symptom and medication review. Testing should follow the question being investigated.

4 sources · Endocrine SocietyRead · 2 min →
Longevity & PerformanceLongevity

Lean mass and grip strength are different measurements

A body scan estimates tissue; a grip test measures force. Why muscle quantity and physical strength do not always change together.

2 sources · PubMed / PMCRead · 2 min →
Longevity & PerformanceLongevity

A first NAD+ consultation: evidence and expectations

For frequent travelers considering NAD+, the important questions are what is causing fatigue, which product is proposed and what evidence supports it.

4 sources · FDA, PubMed / PMCRead · 2 min →
Longevity & PerformanceLongevity

Persistent fatigue: what to check before considering NAD+

Fatigue can have several causes. Learn how sleep, symptoms and selected blood tests shape an evaluation before NAD+ enters the conversation.

4 sources · PubMed / PMC, NIHRead · 2 min →
Longevity & PerformanceLongevity

Why a requested peptide still needs a medical assessment

A prescription decision considers the specific product, intended use, evidence, and health history. Tracking your own data does not replace that review.

2 sources · FDARead · 2 min →
Longevity & PerformanceLongevity

Caregiver fatigue: what thyroid and iron tests can tell you

Persistent caregiver fatigue deserves context. Thyroid and iron tests answer specific questions; cortisol does not measure the burden of caregiving.

4 sources · NIH, Endocrine SocietyRead · 2 min →
Longevity & PerformanceLongevity

VO2 max and zone 2: two different ways to describe exercise

VO2 max describes aerobic capacity. Training zones describe effort. Understanding the difference can make fitness advice easier to use.

Read · 2 min →
Longevity & PerformanceLongevity

Melatonin, magnesium and the difference between sleep problems

Melatonin and magnesium do different things. A sleep schedule, persistent insomnia and a mineral deficiency are separate questions.

4 sources · NIHRead · 2 min →