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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.

All guides

201 guides · Page 3 of 17
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 →
Hormones & Vitality

Migraines during perimenopause: why the pattern can change

Estrogen fluctuations may affect migraine frequency. Sleep, other triggers and the headache history help clarify a changing pattern.

3 sources · The Menopause SocietyRead · 2 min →
Biomarkers & Labs

Postpartum fatigue: what iron, B12 and thyroid tests can clarify

Postpartum fatigue can have more than one cause. Iron stores, B12, and thyroid function answer different questions when testing is warranted.

5 sources · NIHRead · 2 min →
Trust & Safety

Finasteride side effects: mood and sexual health

Understand the difference between trial findings and postmarketing reports when weighing finasteride’s sexual and mood-related side effects.

3 sources · FDA, NIHRead · 2 min →
Trust & Safety

Semaglutide before surgery: tell the anesthesia team early

Semaglutide can delay stomach emptying. Learn why the procedure team needs to know and why medication instructions are individualized.

2 sources · NIHRead · 2 min →
Trust & Safety

A thinner ponytail in your forties: shedding or ongoing hair loss?

The timing and pattern of thinning help distinguish delayed shedding from other hair-loss conditions. Both can occur together.

3 sources · The Menopause SocietyRead · 2 min →
Weight & Metabolic

When GLP-1 treatment changes your appetite, what happens to meals?

A smaller appetite changes meal planning. Food quality, tolerability and enough nutrition still matter, especially when cooking for a household.

2 sources · PubMed / PMC, NIHRead · 2 min →
Biomarkers & Labs

Night shifts and lab timing: cortisol, TSH and glucose

Clock time, sleep timing and fasting status can affect interpretation. The right collection plan depends on the particular test and clinical question.

6 sources · NIH, PubMed / PMC, Endocrine SocietyRead · 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 →
Biomarkers & Labs

What to expect before labs are ordered at a first visit

A first visit should connect your health history to the tests being ordered. Here is what makes an intake and follow-up useful.

Read · 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 →